Rainbow Electronics MAX6764 User Manual

General Description

The MAX6754–MAX6764 low-power window detectors monitor undervoltage/overvoltage conditions on system power supplies. These devices assert when the monitored voltage is under the undervoltage and/or over the overvoltage thresholds.

The MAX6754–MAX6759/MAX6763/MAX6764 monitor a single voltage. The MAX6760/MAX6761/MAX6762 monitor dual-voltage systems. The MAX6754/MAX6755/ MAX6756 provide a single undervoltage/overvoltage output and the MAX6757–MAX6764 provide independent undervoltage and overvoltage outputs. The outputs are available in push-pull or open-drain configurations.

The MAX6754–MAX6762 offer factory-fixed voltage thresholds for monitoring system voltages from 0.9V to 5V with a selectable ±5%, ±10%, or ±15% window voltage. The MAX6763/MAX6764 allow for externally adjustable thresholds. The MAX6754–MAX6762 are available in two delay timing options (20µs, typ or 100ms, min). The MAX6760/MAX6761/MAX6762 also include a latched overvoltage output function and the MAX6754–MAX6762 include a manual reset input.

The family of products is available in small SOT23 and TDFN packages and is specified over the extended temperature range of -40°C to +125°C.

Applications

Features

♦ Single- or Dual-Supply Voltage Monitors

♦ Factory-Trimmed Window Threshold Options for

5V, 3.3V, 3V, 2.5V, 1.8V, 1.5V, 1.2V, and 0.9V Supplies

♦ Externally Adjustable Window Monitoring Options

for Supplies Down to 0.5V

♦ Selectable Window Threshold Options (±5%,

±10%, ±15%)

♦ Single (Combined UV/OV) or Dual (Separate UV

and OV) Outputs

♦ 20µs (typ) or 100ms (min) Timeout Period Options

(MAX6754–MAX6762)

♦ Manual Reset Input (MAX6754–MAX6762)

♦ Latched Overvoltage Output Function

(MAX6760/MAX6761/MAX6762)

♦ Immune to Short Voltage Transients

♦ Low 10µA Supply Current

♦ Low-Voltage Operation (Outputs Valid for V

Down to 1V)

♦ -40°C to +125°C Operating Temperature Range

♦ Small SOT23 and TDFN Packages

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window

Detectors

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

MAX6757

NMI

RESETMR

GND

SET

µP

Typical Application Circuit

19-3031; Rev 0; 10/03

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

*Note: Insert the threshold level suffixes for VCCand V

CC2

(Tables 1 and 2) after UK, UT, or TA. For the MAX6754–MAX6759, insert only the VCCthreshold suffix after the UK or UT. Insert the reset timeout delay (Table 3) after D to complete the part number. For example, the MAX6760TALTD3-T provides a V

threshold of 5V, a V

CC2

threshold of 3.3V, and a 100ms minimum reset timeout period. Sample stock is generally held on standard versions only (see the Standard Versions

table). Standard versions have an order increment requirement

of 2500 pieces. Nonstandard versions have an order increment requirement of 10,000 pieces. Contact factory for availability.

Ordering Information continued at end of data sheet.

Pin Configurations appear at end of data sheet.

Telecommunications

Networking

Computers/Servers

Data Storage

Power Metering

DC-DC Converter Modules

Automotive

PART* TEMP RANGE PIN-PACKAGE

MAX6754UK_D_-T -40°C to +125°C 5 SOT23-5

MAX6755UK_D_-T -40°C to +125°C 5 SOT23-5

MAX6756UK_D_-T -40°C to +125°C 5 SOT23-5

MAX6757UT_D_-T -40°C to +125°C 6 SOT23-6

MAX6758UT_D_-T -40°C to +125°C 6 SOT23-6

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window Detectors

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

= 1.0V to 6.0V, V

CC2

= 0 to 6.0V (MAX6760–MAX6762), TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA=

+25°C.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

(Voltages with respect to GND) V

, V

CC2

, ............................................................-0.3V to +6.5V

SET, OVLATCH, MR, UVIN, OVIN ..............-0.3V to (V

+ 0.3V)

UV, RESET, OV (open drain) .................................-0.3V to +6.5V

RESET, OV, UV, UV, RESET (push-pull).....-0.3V to (V

+ 0.3V)

Input/Output Current (all pins) ............................................20mA

Continuous Power Dissipation (T

= +70°C)

5-Pin SOT23-5 (derate 7.1mW/°C above T

= +70°C)....571mW

6-Pin SOT23-6 (derate 8.7mW/°C above T

= +70°C)....696mW

8-Pin TDFN (derate 24.4mW/°C above T

= +70°C).....1951mW

Operating Temperature Range .........................-40°C to +125°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

POWER REQUIREMENTS

Operating Voltage Range V

VCC Supply Current I

Supply Current

CC2

Adjustable Bias Current

THRESHOLD

VCC Overvoltage Threshold OV

(Note 2) 1.0 6.0

MAX6760TAAA/MAX6761TAAA/ MAX6762TAAA/MAX6763/MAX6764UT-T

VCC = 3.6V, MAX6754–MAX6759, no load 13 30

VCC = 3.6V, MAX6763/MAX6764, no load 10 23

VCC = 3.6V, VCC ≥ V

CC2

MAX6760/MAX6761/MAX6762, no load

CC2

= 1.8V, VCC ≥ V

CC2

MAX6760/MAX6761/MAX6762

(MAX6760–MAX6762TA_AD_)

CC2

(Note 3)

= V

SET

L, 5V

SET = V

SET = GND 5.250 5.375 5.500

= V

SET

SET = V

SET = GND 3.465 3.548 3.630

= V

SET

= V

TA = -40°C to +125°C, rising V

R, 3.0V

Z, 2.5V

SET = V

SET = GND 3.150 3.225 3.300

SET = V

SET = GND 2.625 2.688 2.750

= V

SET

W, 1.8V

SET = V

SET = GND 1.890 1.935 1.980

1.4 6.0

13 30

1 1.5 µA

-20 +20 nA

5.750 5.875 6.000

5.500 5.625 5.750

3.795 3.878 3.960

3.630 3.713 3.795T, 3.3V

3.450 3.525 3.600

3.300 3.375 3.450

2.875 2.938 3.000

2.750 2.813 2.875

2.070 2.115 2.160

1.980 2.025 2.070

µA

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window

Detectors

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

= 1.0V to 6.0V, V

CC2

= 0 to 6.0V (MAX6760–MAX6762), TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA=

+25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

VCC Undervoltage Threshold UV

Overvoltage Threshold OV

CC2

L, 5V

TA = -40°C

to +125°C, falling V

R, 3.0V

W, 1.8V

T, 3.3V

W, 1.8V

TA = -40°C to +125°C,

TH2

rising V

CC2

G, 1.2V

ADJ

= V

SET

SET = V

4.000 4.125 4.250

4.250 4.375 4.500

SET = GND 4.500 4.625 4.750

= V

SET

SET = V

2.640 2.723 2.805

2.805 2.888 2.970T, 3.3V

SET = GND 2.970 3.053 3.135

= V

SET

SET = V

2.400 2.475 2.550

2.550 2.625 2.700

SET = GND 2.700 2.775 2.850

= V

SET

SET = V

2.000 2.063 2.125

2.125 2.188 2.250Z, 2.5V

SET = GND 2.250 2.313 2.375

= V

SET

SET = V

1.440 1.485 1.530

1.530 1.575 1.620

SET = GND 1.620 1.665 1.710

= V

SET

SET = V

3.795 3.878 3.960

3.630 3.713 3.795

SET = GND 3.465 3.548 3.630

= V

SET

SET = V

3.450 3.525 3.600

3.300 3.375 3.450R, 3.0V

SET = GND 3.150 3.225 3.300

= V

SET

SET = V

2.875 2.938 3.000

2.750 2.813 2.875Z, 2.5V

SET = GND 2.625 2.688 2.750

= V

SET

SET = V

2.070 2.115 2.160

1.980 2.025 2.070

SET = GND 1.890 1.935 1.980

= VSB (Note 2) 1.725 1.763 1.800

SET

SET = VCC (Note 2) 1.650 1.688 1.725I, 1.5V

SET = GND (Note 2) 1.575 1.613 1.650

= VSB (Note 2) 1.380 1.410 1.440

SET

SET = VCC (Note 2) 1.320 1.350 1.380

SET = GND (Note 2) 1.260 1.290 1.320

= VSB (Note 2) 1.035 1.058 1.080

SET

SET = VCC (Note 2) 0.990 1.013 1.035E, 0.9V

SET = GND (Note 2) 0.945 0.968 0.990

= V

SET

SET = V

0.489 0.500 0.511

0.468 0.479 0.489

SET = GND 0.447 0.457 0.468

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window Detectors

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

= 1.0V to 6.0V, V

CC2

= 0 to 6.0V (MAX6760–MAX6762), TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA=

+25°C.) (Note 1)

Threshold Hysteresis V

UNDERVOLTAGE/OVERVOLTAGE INPUTS (UVIN, OVIN) (MAX6763/MAX6764)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Undervoltage Threshold UV

CC2

TA = -40°C to +125°C,

TH2

falling V

HYSTVCC

, V

CC2

T, 3.3V

Z, 2.5V

G, 1.2V

ADJ

= V

SET

SET = V

SET = GND 2.970 3.053 3.135

= V

SET

SET = V

SET = GND 2.700 2.775 2.850

= V

SET

SET = V

SET = GND 2.250 2.313 2.375

= V

SET

SET = V

SET = GND 1.620 1.665 1.710

= VSB (Note 2) 1.200 1.238 1.275

SET

SET = VCC (Note 2) 1.275 1.313 1.350I, 1.5V

SET = GND (Note 2) 1.350 1.388 1.425

= VSB (Note 2) 0.960 0.990 1.020

SET

SET = VCC (Note 2) 1.020 1.050 1.080

SET = GND (Note 2) 1.080 1.110 1.140

= VSB (Note 2) 0.720 0.743 0.765

SET

SET = VCC (Note 2) 0.765 0.788 0.810E, 0.9V

SET = GND (Note 2) 0.810 0.833 0.855

= V

SET

SET = V

SET = GND 0.383 0.394 0.404

2.640 2.723 2.805

2.805 2.888 2.970

2.400 2.475 2.550

2.550 2.625 2.700R, 3.0V

2.000 2.063 2.125

2.125 2.188 2.250

1.440 1.485 1.530

1.530 1.575 1.620W, 1.8V

0.340 0.351 0.362

0.362 0.372 0.383

0.7 %

UVIN, OVIN Threshold Voltage V

UVIN, OVIN Input Bias Current I

UVIN, OVIN Threshold Hysteresis

TH-IN

HYST

0.4875 0.5 0.5125 V

-10 +10 nA

0.7 %

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window

Detectors

_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS (continued)

= 1.0V to 6.0V, V

CC2

= 0 to 6.0V (MAX6760–MAX6762), TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA=

+25°C.) (Note 1)

TIMING CHARACTERISTICS

Reset and UV Timeout Period t

VCC to Reset Delay t

VCC to UV Delay t

VCC to OV Delay t

UVIN to UV Delay (MAX6763/MAX6764) 20 µs

OVIN to OV Delay (MAX6763/MAX6764) 20 µs

Startup Delay Time t

THRESHOLD WINDOW SELECT INPUT (SET)

Input Voltage Low 0 0.1 V

Input Bias Voltage (Note 5)

Input Voltage High VCC - 0.1 V

Input Current I

MANUAL RESET (MR)

Input Voltage Low

Input Voltage High

Pullup Resistance to V

Minimum Pulse Width 4µs

Transient Immunity 300 ns

Propagation Delay

OVERVOLTAGE OUTPUT LATCH CONTROL INPUT (OVLATCH)

Input Voltage Low

Input Voltage High

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

D0 20 µs

D3 100 185 320 ms

20 µs

-1 +1 µA

0.23 x V

0.6 x V

26 kΩ

D0 40

D3 100 185 320 ms

0.3 x V

0.7 x V

D-RESET

D-UV

D-OV

START

SET

D-MR

MR_P

Figure 7

VCC/V UV

VCC/V OV

VCC/V OV (MAX6757–MAX6762 only)

D0 options only, OV output (Note 4) 2 ms

VCC = 1.4V 0.65 0.75

VCC = 3.0V 0.81 2.19

VCC = 6.0V 1.10 4.90

MR falling, Figure 7 300

MR rising, Figure 7

falling at 10mV/µs from

CC2

+ 100mV to UVTH - 100mV

rising at 10mV/µs from

CC2

- 100mV to OVTH + 100mV

rising at 10mV/µs from

CC2

- 100mV to OVTH + 100mV

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window Detectors

6 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

= 1.0V to 6.0V, V

CC2

= 0 to 6.0V (MAX6760–MAX6762), TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA=

+25°C.) (Note 1)

Input Bias Current I

RESET, RESET, UV, UV, OV

RESET, UV Output Low (Open Drain or Push-Pull)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

RESET, UV Output High (Push-Pull)

RESET, UV Output Low (Push-Pull)

RESET, UV Output High (Push-Pull)

OVLATCH

Any VCC ≥ 1.0V, I output asserted

Any VCC ≥ 1.2V, I output asserted

Any VCC ≥ 1.71V, I output asserted

Any VCC ≥ 2.85V, I output asserted

Any VCC ≥ 4.75V, I output asserted

Any VCC ≥ 1.71V, I output deasserted

Any VCC ≥ 2.85V, I output deasserted

Any VCC ≥ 4.75V, I output deasserted

Any VCC ≥ 1.71V, I output deasserted

Any VCC ≥ 2.85V, I output deasserted

Any VCC ≥ 4.75V, I output deasserted

Any VCC ≥ 1.0V, I output asserted

Any VCC ≥ 1.2V, I output asserted

Any VCC ≥ 1.71V, I output asserted

Any VCC ≥ 2.85V, I output asserted

Any VCC ≥ 4.75V, I output asserted

= 100µA,

SINK

= 200µA,

SINK

= 1.0mA,

SINK

= 2.0mA,

SINK

= 4.0mA,

SINK

SOURCE

= 1.0mA,

SINK

= 2.0mA,

SINK

= 4.0mA,

SINK

SOURCE

= 0.8mA,

= 2.0mA,

= 4.0mA,

= 50µA,

= 100µA,

= 0.8mA,

= 2.0mA,

= 4.0mA,

-1 +1 µA

0.8 x V

0.3

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window

Detectors

_______________________________________________________________________________________ 7

ELECTRICAL CHARACTERISTICS (continued)

= 1.0V to 6.0V, V

CC2

= 0 to 6.0V (MAX6760–MAX6762), TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA=

+25°C.) (Note 1)

Note 1: Devices are production tested at +25°C. Overtemperature limits are guaranteed by design. Note 2: Voltage monitoring requires that V

must be greater than or equal to 1.4V, but outputs remain asserted in the correct

state for V

down to 1.0V.

Note 3: Guaranteed by design. Note 4: For D0 window detector options and OV outputs, startup delay time is the time required for the internal reference/circuitry

to reach specified accuracy after the monitor is powered up from GND.

Note 5: The input bias voltage is based off of V

. The minimum value is given by the equation (0.1 x V

+ 0.51)V and the maxi-

mum value is given by (0.9 x V

- 0.51)V.

OV Output Low (Open-Drain or Push-Pull)

OV Output High (Push-Pull)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Any VCC ≥ 1.98V, I output asserted

Any VCC ≥ 2.75V, I

output asserted

Any VCC ≥ 3.63V, I output asserted

Any VCC ≥ 5.5V, I output asserted

Any VCC ≥ 1.0V, I output deasserted

Any VCC ≥ 1.2V, I output deasserted

Any VCC ≥ 1.98V, I output deasserted

Any VCC ≥ 2.75V, I output deasserted

Any VCC ≥ 3.63V, I output deasserted

Any VCC ≥ 5.5V, I output deasserted

SINK

SOURCE

= 1.4mA,

= 2.0mA,

= 3.0mA,

= 4.0mA,

= 50µA,

= 100µA,

= 1.4mA,

= 2.0mA,

= 3.0mA,

= 4.5mA,

0.8 x V

0.3

RESET, UV, OV Output OpenDrain Leakage Current

LKG

Output not asserted 1 µA

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window Detectors

8 _______________________________________________________________________________________

Typical Operating Characteristics

(VCC= 5V, V

CC2

= 3.3V, TA= +25°C, unless otherwise noted.)

OVERVOLTAGE THRESHOLD

vs. TEMPERATURE

MAX6754 toc01

TEMPERATURE (°C)

NORMALIZED OVERVOLTAGE THRESHOLD (V)

1109580655035205-10-25

0.98

0.99

1.00

1.01

1.02

1.03

0.97

-40 125

OVERVOLTAGE THRESHOLD RISING

OVERVOLTAGE THRESHOLD FALLING

NORMALIZED TO RISING THRESHOLD AT T

= +25°C

UNDERVOLTAGE THRESHOLD

vs. TEMPERATURE

MAX6754 toc02

TEMPERATURE (°C)

NORMALIZED UNDERVOLTAGE THRESHOLD (V)

1109580655035205-10-25

0.98

0.99

1.00

1.01

1.02

1.03

0.97

-40 125

UNDERVOLTAGE THRESHOLD RISING

UNDERVOLTAGE THRESHOLD FALLING

NORMALIZED TO FALLING THRESHOLD AT T

= +25°C

TRANSIENT IMMUNITY

vs. THRESHOLD OVERDRIVE

MAX6754 toc03

OVERDRIVE (mV)

TRANSIENT IMMUNITY (µs)

10010

100

10001

1000

OUTPUT ASSERTS ABOVE THIS LINE

D3 TIMEOUT PERIOD

vs. TEMPERATURE

MAX6754 toc04

TIMEOUT PERIOD (ms)

182

184

186

188

190

192

194

180

TEMPERATURE (°C)

1109580655035205-10-25-40 125

SUPPLY CURRENT vs. SUPPLY VOLTAGE

MAX6754 toc05

VCC (V)

(µA)

5432

TA = +125°C T

= +85°C

= +25°C

= -40°C

OUTPUT VOLTAGE LOW

vs. SINK CURRENT

MAX6754 toc06

SINK

(mA)

(V)

15105

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

020

VCC = 5.0V

= 3.3V

= 2.5V

= 1.8V

OUTPUT VOLTAGE HIGH

vs. SOURCE CURRENT

MAX6754 toc07

SOURCE

(mA)

- V

(V)

15105

-1.6

-1.4

-1.2

-1.0

-0.8

-0.6

-0.4

-0.2

-1.8 020

VCC = 5.0V

VCC = 3.3V

VCC = 2.5V

VCC = 1.8V

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window

Detectors

_______________________________________________________________________________________ 9

Pin Description

MAX6754/ MAX6755/

MAX6756

——— 1

MAX6757/ MAX6758/

MAX6759

111–

2 2 2 2 GND Ground

338— MR

4 ———

564— SET

MAX6760/ MAX6761/

MAX6762

MAX6763/

MAX6764

NAME FUNCTION

RESET/

RESET

Power Voltage Input. V voltage.

Power Input. V

Active-Low Manual Reset Input. Drive MR low to assert undervoltage and reset outputs. The asserted output remains asserted for the specified propagation delay period after MR goes high. MR is internally pulled up to V

Reset Output. The Reset Output asserts when V selected UV output deasserts after the specified timeout period after V above the UV MAX6754: Active-low push-pull output (RESET). MAX6755: Active-high push-pull output (RESET). MAX6756: Active-low open-drain output (RESET).

Threshold Window Select Input. SET configures the undervoltage and overvoltage window range for the internal detectors. Connect SET to GND for ±5% window, or to V for a ±15% window.

through a 26kΩ resistor.

threshold or above the selected OVTH threshold. Reset

threshold or drops below the OVTH threshold.

powers the device. VCC is the monitored

powers the device.

for ±10% window. Bias SET to VCC/2

is below the

rises

— 46—

—— 3 — V

555OV

UV/

CC2

Undervoltage Output. UV/UV asserts when the monitored supply/supplies are below the UV deasserts after the specified timeout period when the monitored supply/supplies rise above the UV propagation delay after MR goes high. MAX6757/MAX6760: Active-low push-pull output (UV). MAX6758/MAX6761: Active-high push-pull output (UV). MAX6759/MAX6762: Active-low open-drain output (UV).

Voltage Input. Input for the second window voltage monitor, and

CC2

device output power supply when V

Active-Low Overvoltage Output. OV asserts low when the monitored supply/supplies are above their overvoltage threshold (OV high impedance immediately when the monitored supply/supplies drop below OV There is no timeout delay period for the OV output. For MAX6763/MAX6764, OV is low when OVIN is above the internal

0.5V threshold. OV is high when OVIN is below the internal 0.5V threshold. MAX6757–MAX6762: Active-low open-drain output. MAX6763: Active-low push-pull output. MAX6764: Active-low open-drain output.

thresholds or MR is low. UV/UV

thresholds or for the specified

> VCC.

CC2

). OV goes

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window Detectors

10 ______________________________________________________________________________________

Pin Description (continued)

Functional Diagrams

Figure 1. MAX6754/MAX6755/MAX6756 Functional Diagram

MAX6754/ MAX6755/

MAX6756

MAX6757/ MAX6758/

MAX6759

MAX6760/ MAX6761/

MAX6762

MAX6763/

MAX6764

7 — OVLATCH

——— 3 UVIN

——— 4 UV

——— 6 OVIN

——EP — EP

NAME FUNCTION

Overvoltage Output Latch Control Input. Drive OVLATCH high to latch the overvoltage output for any V OVLATCH low to clear the latch after overvoltage conditions have been removed. The latch is transparent when OVLATCH is connected to GND. OVLATCH is a high-impedance input. Use external pullup or pulldown.

Undervoltage Input. UV is low when UVIN is below the internal 0.5V threshold. UV is high when UVIN is above the internal 0.5V threshold.

Undervoltage Output. UV is low when UVIN is below the internal 0.5V threshold. UV is high when UVIN is above the internal 0.5V threshold. There is no timeout delay period for the UV output.

Overvoltage Input. OV is low when OVIN is above the internal 0.5V threshold. OV is high when OVIN is below the internal 0.5V threshold.

Exposed Pad. EP is internally connected to GND. Leave EP unconnected or connect to GND.

or V

CC2

overvoltage condition. Drive

ADJUST

SET

MONITOR VOLTAGE

UV THRESHOLD

-5%, -10%, -15%

INTERNAL

REFERENCE

OV THRESHOLD

+5%, +10%, +15%

UV MONITOR

OV MONITOR

MAX6754/MAX6755/MAX6756

TIMEOUT

PERIOD OPTION

( ) MAX6755 ONLY.

(RESET)/ RESET

GND

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window

Detectors

______________________________________________________________________________________ 11

Figure 2. MAX6757/MAX6758/MAX6759 Functional Diagram

Functional Diagrams (continued)

SET

ADJUST MONITOR VOLTAGE

UV THRESHOLD

-5%, -10%, -15%

INTERNAL

REFERENCE

OV THRESHOLD

+5%, +10%, +15%

(UV)/ UV

GND

UV MONITOR

OV MONITOR

MAX6757/MAX6758/MAX6759

TIMEOUT

PERIOD OPTION

( ) MAX6758 ONLY.

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window Detectors

12 ______________________________________________________________________________________

Figure 3. MAX6760/MAX6761/MAX6762 Functional Diagram

Functional Diagrams (continued)

ADJUST MONITOR VOLTAGE

SET

CC2

UV THRESHOLD

-5%, -10%, -15%

INTERNAL

REFERENCE

ADJUST MONITOR VOLTAGE

OV THRESHOLD

+5%, +10%, +15%

UV MONITOR

OV MONITOR

UV MONITOR

MRV

TIMEOUT

PERIOD OPTION

CIRCUIT

(UV)/ UV

OVLATCH

GND

MAX6760/MAX6761/MAX6762

OV MONITOR

( ) MAX6761 ONLY.

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window

Detectors

______________________________________________________________________________________ 13

Detailed Description

The MAX6754–MAX6764 are low-power window voltage detectors capable of monitoring undervoltage and overvoltage conditions on system power supplies. Whenever a monitored voltage falls below its undervoltage threshold or exceeds its overvoltage threshold, these devices assert their outputs to notify the system (see Functional Diagrams).

The MAX6754/MAX6755/MAX6756 are single-voltage window detectors with internally fixed nominal voltage, externally adjustable set window, single reset under/overvoltage output, and a manual reset input.

The MAX6757/MAX6758/MAX6759 are single-voltage window detectors with internally set nominal voltage, externally adjustable set window, separate under/overvoltage outputs, and manual reset input.

The MAX6760/MAX6761/MAX6762 are dual-voltage window detectors with internally/externally set nominal voltages, externally adjustable set window, separate under/overvoltage outputs, manual reset input, and overvoltage latch functions.

The MAX6763/MAX6764 are single adjustable window detectors with separate under/overvoltage outputs.

The MAX6754–MAX6762 offer factory-fixed voltage thresholds for monitoring system voltages from 0.9V to 5V. The MAX6754–MAX6762 include a SET function to select the window voltage to ±5%, ±10%, or ±15%. The MAX6763/MAX6764 allow for externally adjustable upper and lower voltage thresholds to be set externally (down to 0.5V). The MAX6754–MAX6762 are available with two timing options (20µs propagation delay or 100ms minimum reset timeout).

Supply Voltages

VCCis the power-supply input and the monitored voltage of the MAX6754–MAX6762. These devices feature a factory-trimmed VCCand V

CC2

divider that sets the nominal input range (see Tables 1 and 2). VCCfor the MAX6763/ MAX6764 is the power supply of the device and not the monitored voltage. For noisy systems, bypass VCCand V

CC2

each with a 0.1µF capacitor to GND.

Setting the Adjustable Nominal Voltage

Threshold

The MAX6760/MAX6761/MAX6762 (versions with suffixes LA, TA, RA, ZA, WA, and AA) offer adjustable nominal voltage threshold to monitor V

CC2

. Use an external volt-

age-divider to set the voltage at V

CC2

to 0.4255V. Configure SET to select a monitor window of ±5%, ±10%, or ±15% (see Figure 5). The MAX6760/MAX6761/ MAX6762 suffix AA monitor only V

CC2

and do not moni-

tor V

Figure 4. MAX6763/MAX6764 Functional Diagram

Functional Diagrams (continued)

Figure 5. Setting the Threshold Voltage of V

CC2

MAX6763/MAX6764

UVIN

OVIN

INTERNAL

REFERENCE

0.5V OV

UV MONITOR

GND

OV MONITOR

0.4255V +5%

V+

CC2

+10% +15%

0.4255V -5%

-10%

-15%

MAX6760/MAX6761/MAX6762

(SUFFIXES LA, TA, RA, ZA, WA, AA)

( ) MAX6761 ONLY.

(UV) UV

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window Detectors

14 ______________________________________________________________________________________

Choose R2 to have a resistance of up to 500kΩ. Calculate R1 by:

R1 = ((V+- 0.4255V) x R2) / 0.4255V

The MAX6763/MAX6764 provide inputs to a window detector allowing the programming of the threshold voltage to within VCC(see Figure 6).

Choose R1, R2, and R3 such that:

(V+ / (R1 + R2 + R3)) ≥ 1µA

SET

The MAX6754–MAX6762 allow the setting of the window voltage range of the voltage detector. Connect SET to GND to set a ±5% window. Connect SET to V

for a

±10% window. Bias SET to VCC/2 for a ±15% window.

Manual Reset (MR)

The MAX6754–MAX6762 include an active-low manual reset input. Drive MR low to assert a reset output (MAX6754/MAX6755/MAX6756) or an undervoltage output (MAX6757/MAX6758/MAX6759). The output remains asserted for the specified propagation delay time (see Figure 7) after MR goes high. MR is internally pulled to VCCwith a 26kΩ resistor.

Overvoltage Latch Control Input

(OVLATCH)

The MAX6760/MAX6761/MAX6762 provide an overvoltage latch control input (OVLATCH). Drive OVLATCH high to latch the overvoltage output for any VCCor V

CC2

overvoltage condition. Drive OVLATCH low to clear the latch after overvoltage conditions have been removed. The latch is transparent when OVLATCH is connected to GND. OVLATCH is a high impedance input. Use external pullup or pulldown.

Reset, Undervoltage, and Overvoltage

Outputs (RESET,

RESET, UV

, UV, OV)

RESET, RESET, UV, UV, and OV outputs assert when the monitored supply is below the selected UV

threshold or above the selected OVTHthreshold. The reset output deasserts after the specified timeout period when the monitored supply rises above the UV

threshold or drops below the OVTHthreshold. The push-pull versions are referenced to VCC.

The MAX6760/MAX6761/MAX6762 monitor both V

and V

CC2

. An under/overvoltage condition on either

voltage supply asserts the corresponding output. RESET and UV are guaranteed to be in the correct logic state when V

or V

CC2

> 1V.

Figure 6. Setting the Under/Overvoltage Window

Figure 7a. Manual Reset/

Reset

Timing Diagram

Figure 7b. VCC/RESET, UVTiming Diagram

V+

MAX6763/MAX6764

UVIN

INTERNAL

REFERENCE

0.5V

OVIN

OVERVOLTAGE ASSERTS WHEN

UNDERVOLTAGE ASSERTS WHEN

UV MONITOR

OV MONITOR

V+ x R3

R1 + R2 + R3

V+ x (R2 + R3)

R1 + R2 + R3

GND

> 0.5V

< 0.5V

RESET, UV

D-UV

RESET, UV

(RESET IS THE COMPLEMENT OF RESET)

D-MR

MR_P

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window

Detectors

______________________________________________________________________________________ 15

Applications Information

Microprocessor Monitoring

Figure 8 shows a microprocessor monitoring circuit. An

overvoltage condition on either the core or I/O supply

turns the SCR on, blowing the fuse to disconnect the circuit from the power source. An optional capacitor (C1) on the gate of the SCR provides additional transient immunity against nuisance trips.

Figure 8. Microprocessor Monitoring

Selector Guide

CORE

DC-DC

CONVERTER

UNREGULATED

POWER SOURCE

FUSE

SCR

I/O

DC-DC

CONVERTER

100kΩ 100kΩ

100kΩ

CORE

I/O

µP

MAX6760

GND

SET

CC2

OVLATCH

PUSH BUTTON

RESET

NMI

*C1 1µF

PUSH-PULL

RESET

PUSH-PULL

RESET

OPEN-DRAIN

MAX6754 X —

MAX6755 — X

MAX6756 ——

MAX6757 ——

MAX6758 ——

MAX6759 ——

MAX6760 ——

MAX6761 ——

MAX6762 ——

MAX6763 ——

MAX6764 ——

RESET

—

*OPTIONAL.

PUSH-PULLUVPUSH-PULLUVOPEN-DRAINUVPUSH-PULLOVOPEN-DRAIN

——

X —

— X

——

X —

— X

——

X —

— X

—

——

—

— X

X —

— X

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window Detectors

16 ______________________________________________________________________________________

Ordering Information (continued)

*Note: Insert the threshold level suffixes for VCCand V

CC2

(Tables 1 and 2) after UK, UT, or TA. For the MAX6754–MAX6759, insert only the V

threshold suffix after the UK or UT. Insert the reset timeout delay (Table 3) after D to complete the part number. For example, the MAX6760TALTD3-T provides a V

threshold of 5V, a V

CC2

threshold of 3.3V, and a 100ms minimum reset timeout period. Sample stock is generally held on standard versions only (see the Standard Versions

table). Standard versions have an order increment requirement

of 2500 pieces. Nonstandard versions have an order increment requirement of 10,000 pieces. Contact factory for availability.

Table 1. Window Threshold Voltage Suffix Guide Single Fixed V

(MAX6754—MAX6759)

Table 2. Window Threshold Voltage Suffix Guide Dual Fixed/Adjustable (MAX6760/MAX6761/MAX6762)

*See Setting the Adjustable Nominal Voltage Threshold Section.

Table 3. Timeout Period Suffix Guide

**Future product—contact factory for availability.

PART NO. SUFFIX VCC NOMINAL SYSTEM VOLTAGE (V)

L 5.0

T 3.3

R 3.0

Z 2.5

W 1.8

PART NO.

SUFFIX

LT 5 3.3

LR 5 3.0

LA 5 ADJ*

TZ 3.3 2.5

TW 3.3 1.8

TI 3.3 1.5

TG 3.3 1.2

TE 3.3 0.9

TA 3.3 ADJ*

RZ 3.0 2.5

RW 3.0 1.8

RI 3.0 1.5

RG 3.0 1.2

RE 3.0 0.9

RA 3.0 ADJ*

ZW 2.5 1.8

ZI 2.5 1.5

ZG 2.5 1.2

ZE 2.5 0.9

ZA 2.5 ADJ*

WI 1.8 1.5

WG 1.8 1.2

WE 1.8 0.9

WA 1.8 ADJ*

AA – ADJ*

NOMINAL

SYSTEM VOLTAGE

(V)

NOMINAL

CC2

SYSTEM VOLTAGE

(V)

TIMEOUT

PERIOD SUFFIX

D0 — 0.02 —

D3 100 185 320

PART* TEMP RANGE PIN-PACKAGE

MAX6759UT_D_-T -40°C to +125°C 6 SOT23-6

MAX6760TA_ _D_-T -40°C to +125°C 8 TDFN-8

MAX6761TA_ _D_-T -40°C to +125°C 8 TDFN-8

MAX6762TA_ _D_-T -40°C to +125°C 8 TDFN-8

MAX6763UT-T** -40°C to +125°C 6 SOT23-6

MAX6764UT-T** -40°C to +125°C 6 SOT23-6

ACTIVE TIMEOUT PERIOD

MIN (ms) TYP (MS) MAX (ms)

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window

Detectors

______________________________________________________________________________________ 17

Standard Versions Table

PART TOP MARK

MAX6754UKLD0 AEOC

MAX6754UKLD3 AEJN

MAX6754UKTD0 AEOD

MAX6754UKTD3 AEJO

MAX6754UKZD0 AEJQ

MAX6754UKZD3 AEOF

MAX6754UKWD0 AEOG

MAX6754UKWD3 AEJR

MAX6755UKLD0 AEOH

MAX6755UKLD3 AEJS

MAX6755UKTD0 AEOI

MAX6755UKTD3 AEJT

MAX6755UKZD0 AEKV

MAX6755UKZD3 AEOK

MAX6755UKWD0 AEOL

MAX6755UKWD3 AEJW

MAX6756UKLD0 AEJX

MAX6756UKLD3 AEOM

MAX6756UKTD0 AEJY

MAX6756UKTD3 AEON

MAX6756UKZD0 AEOP

MAX6756UKZD3 AEKA

MAX6756UKWD0 AEKB

MAX6756UKWD3 AEOQ

MAX6757UTTD0 ABST

MAX6757UTTD3 ABRB

MAX6757UTLD0 ABSO

MAX6757UTLD3 ABRC

MAX6757UTZD0 ABRE

MAX6757UTZD3 ABSW

MAX6757UTWD0 ABSX

MAX6757UTWD3 ABRF

PART TOP MARK

MAX6758UTLD0 ABSY

MAX6758UTLD3 ABRG

MAX6758UTTD0 ABSZ

MAX6758UTTD3 ABRH

MAX6758UTZD0 ABRJ

MAX6758UTZD3 ABTB

MAX6758UTWD0 ABTC

MAX6758UTWD3 ABRK

MAX6759UTLD0 ABRL

MAX6759UTLD3 ABTD

MAX6759UTTD0 ABRM

MAX6759UTTD3 ABTE

MAX6759UTZD0 ABTG

MAX6759UTZD3 ABRO

MAX6759UTWD0 ABRP

MAX6759UTWD3 ABTH

MAX6760TALTD3 AIO

MAX6760TALAD3 AHI

MAX6760TATZD3 AIR

MAX6760TATWD3 AHJ

MAX6760TATAD3 AIT

MAX6760TARAD3 AIV

MAX6760TAZWD3 AIX

MAX6760TAZAD3 AIZ

MAX6760TAWED3 AJB

MAX6760TAWAD3 AHL

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window Detectors

18 ______________________________________________________________________________________

Standard Versions Table (continued)

PART TOP MARK

MAX6761TALTD3 AJD

MAX6761TALAD3 AHN

MAX6761TATZD3 AJG

MAX6761TATWD3 AHO

MAX6761TATAD3 AJI

MAX6761TARAD3 AJK

MAX6761TAZWD3 AJM

MAX6761TAZAD3 AJO

MAX6761TAWED3 AJQ

MAX6761TAWAD3 AHQ

MAX6762TALTD3 AJT

MAX6762TALAD3 AHR

MAX6762TATZD3 AJW

MAX6762TATWD3 AJY

MAX6762TATAD3 AKA

MAX6762TARAD3 AKB

MAX6762TAZWD3 AHT

MAX6762TAZAD3 AKE

MAX6762TAWED3 AKF

MAX6762TAWAD3 AKH

MAX6763UTAD3 ABRQ

MAX6764UTAD3 ABRR

PART TOP MARK

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window

Detectors

______________________________________________________________________________________ 19

Chip Information

TRANSISTOR COUNT: 726

PROCESS: BiCMOS

GND

RESET (RESET)MR

1 5 SETV

MAX6754 MAX6755 MAX6756

SOT23

( ) MAX6755 ONLY.

TOP VIEW

GND

UV (UV)

1 6 SET

5OV

MAX6757 MAX6758 MAX6759

SOT23

( ) MAX6758 ONLY.

OVLATCH

UV (UV)

SET

CC2

GND

MAX6760 MAX6761 MAX6762

TDFN

( ) MAX6761 ONLY.

GND

1 6 OVIN

5OV

MAX6763 MAX6764

SOT23

UVIN

Pin Configurations

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window Detectors

20 ______________________________________________________________________________________

Package Information

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)

PIN 1 INDEX AREA

NUMBER OF LEADS SHOWN ARE FOR REFERENCE ONLY

COMMON DIMENSIONS

MIN. MAX.

SYMBOL

0.70 0.80

2.90 3.10

0.00 0.05

0.20 0.40

0.25 MIN.

A2 0.20 REF.

DETAIL A

C0.35

DALLAS

SEMICONDUCTOR

PROPRIETARY INFORMATION

TITLE:

PACKAGE OUTLINE, 6, 8 & 10L, TDFN, EXPOSED PAD, 3x3x0.80 mm

APPROVAL

DOCUMENT CONTROL NO. REV.

PIN 1 ID

1N1

[(N/2)-1] x e

REF.

21-0137 D

6, 8, &10L, DFN THIN.EPS

PACKAGE VARIATIONS

PKG. CODE

T633-1 1.50–0.10D22.30–0.10

1.50–0.10

2.30–0.10T833-1 8

JEDEC SPEC

0.95 BSCeMO229 / WEEA

MO229 / WEEC

0.65 BSC

[(N/2)-1] x e

0.40–0.05b1.90 REF

1.95 REF0.30–0.05

0.25–0.05 2.00 REFMO229 / WEED-30.50 BSC1.50–0.10 2.30–0.1010T1033-1

DALLAS

SEMICONDUCTOR

PROPRIETARY INFORMATION

TITLE:

PACKAGE OUTLINE, 6, 8 & 10L, TDFN, EXPOSED PAD, 3x3x0.80 mm

DOCUMENT CONTROL NO.APPROVAL

21-0137

REV.

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window

Detectors

______________________________________________________________________________________ 21

Package Information (continued)

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)

SOT-23 5L .EPS

PACKAGE OUTLINE, SOT-23, 5L

21-0057

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window Detectors

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

22 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

Package Information (continued)

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)

6LSOT.EPS

PACKAGE OUTLINE, SOT-23, 6L

21-0058

Rainbow Electronics MAX6764 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual