Rainbow Electronics MAX16074 User Manual

19-5112; Rev 0; 1/10

µP Supervisory Circuits in

4-Bump (1mm x 1mm) Chip-Scale Package

General Description

The MAX16072/MAX16073/MAX16074 ultra-small, ultralow-power, microprocessor (µP) supervisory circuits feature a precision band-gap reference, comparator, and internally trimmed resistors that set the threshold voltage. Designed to monitor the system supply voltage and assert an output during power-up, power-down, and brownout conditions, these devices provide excellent circuit reliability and low cost by eliminating external components and adjustments when monitoring nominal system voltage from 1.8V to 3.6V.

The MAX16072 has a push-pull, active-low reset output, the MAX16073 has a push-pull, active-high reset output, and the MAX16074 has an open-drain active-low reset output. The devices are designed to ignore fast transients on VCC. The devices also include a manual reset input (MR).

The MAX16072/MAX16073/MAX16074 are available in a 1mm x 1mm, space-saving, 4-bump, chip-scale package (UCSPTM).

Applications

Portable/Battery-Powered Equipment

Cell Phones

PDAs

MP3 Players

Digital Cameras

Typical Operating Circuit

Features

S Ultra-Low, 0.7µA Supply Current

S Ultra-Small (1mm x 1mm), 4-Bump UCSP

S 20µs, 8ms, 34ms, and 140ms Reset Timeout

Options Available

S Factory-Trimmed Reset Thresholds Available

from 1.58V to 3.08V in Approximately 100mV Increments

S Q2.5% Threshold Accuracy Over Temperature

S Manual Reset Input

S Guaranteed Reset Valid to VCC = 1.0V

S Immune to Short VCC Transient

Ordering Information

PART RESET OUTPUT TYPE

MAX16072RS_ _D_+ Push-Pull, Active-Low 4 UCSP

MAX16073RS_ _D_+ Push-Pull, Active-High 4 UCSP

MAX16074RS_ _D_+ Open-Drain, Active-Low 4 UCSP

Note: All devices are specified over the -40NC to +85NC operat- ing temperature range.

Insert the desired suffix numbers (from Table 1) into the blanks “RS_ _D” to indicate the reset trip threshold. Insert the desired suffix number (from Table 2) into the blank ”D_+” to indicate the reset timeout. Minimum order quantity may apply.

PINPACKAGE

MAX16072/MAX16073/MAX16074

+Denotes a lead(Pb)-free/RoHS-compliant package.

RESET INPUT

µP

GND

MAX16072 MAX16073

MAX16074

( ) FOR THE MAX16073 ONLY

UCSP is a trademark of Maxim Integrated Products, Inc.

_______________________________________________________________ Maxim Integrated Products 1

(RESET)/

RESET

GND

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

µP Supervisory Circuits in 4-Bump (1mm x 1mm) Chip-Scale Package

ABSOLUTE MAXIMUM RATINGS

(Voltages referenced to GND.)

VCC, MR ..................................................................-0.3V to +6V

RESET, RESET Push-Pull ......................... -0.3V to (VCC + 0.3V)

RESET Open-Drain ..................................................-0.3V to +6V

Output Current (all pins) ................................................. Q20mA

Continuous Power Dissipation (TA = +70NC)

4-Bump UCSP (derate 3mW/NC above +70NC) ..........239mW

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.

ELECTRICAL CHARACTERISTICS

(VCC = 1.5V to 2.75V, TA = -40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC and VCC = 3.6V.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Operating Voltage Range V

Supply Current I

Detector Threshold V

Detector Threshold Hysteresis V Detector Threshold Tempco

MR INPUT

MAX16072/MAX16073/MAX16074

MR Input High Voltage

MR Pullup Resistance

RESET/RESET OUTPUT (Note 3)

Output-Voltage Low V

Output-Voltage High V

Open-Drain RESET Output Leakage Current

TIMING

MR Minimum Pulse Width MR Glitch Rejection MR to RESET/RESET

Propagation Delay VCC to Reset Delay t

HYST

DVTH/NC

MPW

EGR

OFF

TA = 0NC to +85NC TA = -40NC to +85NC VCC = 1.8V for VTH P 1.66V VCC = 3.6V, no load 1.0 1.5

See Table 1

VCC rising, VTH P 1.66V (Note 2) (Note 2) 40

VCC R 1.2V, I VCC R 1.65V, I

VCC R 1.65V, I

VCC R 1.2V, I

RESET not asserted (Note 2)

(Note 2) 0.8 (Note 2) 100 ns

MR falling MR rising

VCC = (V

Operating Temperature Range .......................... -40NC to +85NC

Storage Temperature Range ............................ -65NC to +150NC

Junction Temperature .....................................................+150NC

Soldering Temperature (reflow) ......................................+260NC

1.0 5.5

1.2 5.5

0.7 1.2

VCC falling, TA = +25NC

VCC falling, TA = -40NC to +85NC

= 100FA

SINK

= 1mA

SINK

SOURCE

+ 100mV) to (VTH -100mV) 20 90

= 500FA

= 50FA

VTH -

1.5%

VTH -

2.5%

0.7 x V

25 50 75

0.8 x

0.8 x V

200 400 ns

VTH +

1.5%

VTH +

2.5%

6.3 mV

0.7 x V

0.4

0.3

0.1

1 2

ppm/NC

2 ______________________________________________________________________________________

µP Supervisory Circuits in

4-Bump (1mm x 1mm) Chip-Scale Package

ELECTRICAL CHARACTERISTICS (continued)

(VCC = 1.5V to 2.75V, TA = -40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC and VCC = 3.6V.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

MAX1607_RSD0+ 20 80 120

Reset Active Timeout Period t

VCC rising, VCC = (VTH - 100mV) to (VTH + 100mV)

MAX1607_RSD1+ 8 13 17 ms

MAX1607_RSD2+ 34 52 69 ms

MAX1607_RSD3+ 140 210 280 ms

Note 1: Production testing done at TA = +25NC only. Overtemperature limits are guaranteed by design and are not production

tested.

Note 2: Guaranteed by design. Note 3: Reset is guaranteed down to VCC = 1.0V.

Typical Operating Characteristics

= +25°C, unless otherwise noted.)

MAX16072/MAX16073/MAX16074

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

SUPPLY CURRENT (µA)

1.0 5.5 SUPPLY VOLTAGE (V)

SUPPLY CURRENT

vs. TEMPERATURE

3.0

2.5

MAX16072 toc01

2.0

1.5

1.0

SUPPLY CURRENT (µA)

0.5

5.04.54.03.53.02.52.01.5

VCC = 1.8V

-40 85

TEMPERATURE (°C)

VCC = 5V

VCC = 3V

603510-15

MAX16072 toc02

NORMALIZED RESET THRESHOLD (%)

NORMALIZED RESET THRESHOLD

vs. TEMPERATURE

0.3

0.2

0.1

-0.1

-0.2

-0.3

-40 85

TEMPERATURE (°C)

VCC FALLING

VCC RISING

MAX16072 toc03

603510-15

_______________________________________________________________________________________ 3

µP Supervisory Circuits in 4-Bump (1mm x 1mm) Chip-Scale Package

Typical Operating Characteristics (continued)

= +25°C, unless otherwise noted.)

OUTPUT LOW VOLTAGE

vs. SINK CURRENT

2.00

1.75

1.50

1.25

(V)

1.00

0.75

0.50 VCC = 1.8V

0.25

0 20

VCC = 3V

SINK

(mA)

VCC = 5V

18162 4 6 10 128 14

MAX16072 toc04

(V) V

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

VCC TO RESET PROPAGATION DELAY

vs. TEMPERATURE

VOD = OVERDRIVE VOLTAGE

VOD = 100mV

VOD = 10mV

PROPAGATION DELAY (µs)

MAX16072/MAX16073/MAX16074

VOD = 20mV

TEMPERATURE (°C)

VOD = 200mV

VCC FALLING

603510-15-40 85

MAX16072 toc07

120

100

PROPAGATION DELAY (µS)

OUTPUT HIGH VOLTAGE

vs. SOURCE CURRENT

VCC = 5V

VCC = 3V

VCC = 1.8V

18162 4 6 10 128 140 20

(mA)

SOURCE

VCC TO RESET PROPAGATION DELAY

vs. TEMPERATURE

VOD = OVERDRIVE VOLTAGE

VOD = 10mV

VOD = 100mV

VOD = 20mV

VOD = 200mV

VCC RISING

-40 85

TEMPERATURE (°C)

603510-15

MAX16072 toc05

TRANSIENT DURATION (µs)

MAX16072 toc08

RESET DELAY (ns)

MAXIMUM TRANSIENT DURATION

vs. RESET THRESHOLD OVERDRIVE

RESET OCCURS ABOVE LINES

1 1000

RESET THRESHOLD OVERDRIVE (mV)

RST

= 1.63V

RST

10010

= 3.08V

MR TO RESET DELAY (tON)

vs. V

150

120

1.650 2.750

MR RISING

2.4752.2001.925

VCC (V)

MAX16072 toc06

MAX16072 toc09

MR TO RESET DELAY (t

vs. V

1.25

1.00

0.75

0.50

RESET DELAY (µs)

0.25

1.650 2.750

VCC (V)

)

OFF

MR FALLING

2.4752.2001.925

MAX16072 toc10

MR TURN-ON

100ns/div

MAX16072 toc11

MR TURN-OFF

MR 1V/div

RESET 1V/div

4 ______________________________________________________________________________________

MAX16072 toc12

MR 1V/div

RESET 1V/div

200ns/div

µP Supervisory Circuits in

4-Bump (1mm x 1mm) Chip-Scale Package

Bump Configuration

MAX16072/MAX16073/MAX16074

MAX16072 MAX16073 MAX16074

1 2

GND

RESET/

(RESET)

UCSP

TOP VIEW

(BUMP SIDE DOWN)

( ) FOR THE MAX16073 ONLY

Bump Description

BUMP

MAX16072 MAX16073 MAX16074

A1 A1 A1 GND Ground

B1 — —

— B1 — RESET

NAME FUNCTION

Active-Low Push-Pull Reset Output. RESET changes from high to

RESET

low when VCC drops below the detector threshold (VTH) or MR is pulled low. RESET remains low for the reset timeout period after VCC exceeds VTH and MR is high. When MR is low, RESET is low.

Active-High Push-Pull Reset Output. RESET changes from low to high when VCC drops below the detector threshold (VTH) or MR is pulled low. RESET remains high for the reset timeout period after VCC exceeds VTH and MR is high. When MR is low, RESET is high.

— — B1

A2 A2 A2 V

B2 B2 B2

_______________________________________________________________________________________ 5

RESET

Active-Low Open-Drain Reset Output. RESET changes from highimpedance to active-low when VCC drops below the detector threshold (VTH) or MR is pulled low. RESET remains low for the reset timeout period after VCC exceeds the reset threshold and MR is high. When MR is low, RESET is low.

Supply Voltage and Input for the Reset Threshold Monitor

Active-Low Manual-Reset Input. Drive low to force a reset. Reset remains active as long as MR is low and for the reset timeout period (if applicable) after MR is driven high. MR has an internal pullup resistor connected to V

and may be left unconnected if not used.

CC,

µP Supervisory Circuits in 4-Bump (1mm x 1mm) Chip-Scale Package

Functional Diagrams

RESET

TIMEOUT

MAX16073

GND

( ) MAX16073 ONLY

(RESET)

Detailed Description

The MAX16072/MAX16073/MAX16074 ultra-small, ultralow-power, µP supervisory circuits feature a precision band-gap reference, comparator, and internally trimmed resistors that set specified trip threshold voltages. Designed to monitor the system supply voltage and an output during power-up, power-down, and brownout conditions, these devices provide excellent circuit reliability and low cost by eliminating external components

MAX16072/MAX16073/MAX16074

and adjustments when monitoring nominal system voltage from 1.8V to 3.6V.

The MAX16072 has a push-pull active-low reset output, the MAX16073 has a push-pull active-high reset output, and the MAX16074 has an open-drain active-low reset

output. The devices are designed to ignore fast transients on VCC. The devices also include a manual reset input (MR). When MR is low, reset is asserted. When MR is high and VCC is above the detector threshold (VTH), reset is not asserted.

Supply and Monitored Input (VCC)

The MAX16072/MAX16073/MAX16074 operate with a VCC supply voltage from 1.2V to 2.75V. VCC has a rising threshold of VTH + V When VCC rises above VTH + V RESET goes high (RESET goes low) after the reset timeout period (tRP). See Figure 1.

When VCC falls below VTH, RESET goes low (RESET goes high) after a fixed delay (tRD).

RESET

TIMEOUT

MAX16074MAX16072

GND

and a falling threshold of VTH.

HYST

and MR is high,

HYST

RESET

+ V

HYST

t < t

EGR

t < t

MPW

OFFtON

RESET

MPW

Figure 1. MAX16072/MAX16073/MAX16074 Timing Diagram

6 ______________________________________________________________________________________

µP Supervisory Circuits in

4-Bump (1mm x 1mm) Chip-Scale Package

Manual Reset Input (MR)

Many FP-based products require manual-reset capability, allowing the operator, a test technician, or external logic circuit to initiate a reset. A logic-low on MR asserts reset. Reset remains asserted while MR is low, and for the reset active timeout period (tRP) or delay (tON) after MR returns high. This input has an internal 50kI pullup resistor, so it can be left unconnected if it is not used. MR can be driven with TTL or CMOS logic levels, or with open-drain/collector outputs. For manual operation, connect a normally open momentary switch from MR to GND; external debouncing circuitry is not required. If MR is driven from long cables or if the device is used in a noisy environment, connect a 0.1FF capacitor from MR to ground to provide additional noise immunity.

Applications Information

Interfacing to µP with

Bidirectional Reset Pins

Since RESET on the MAX16074 is open-drain, this device interfaces easily with FPs that have bidirectional reset pins. Connecting the FP supervisor’s RESET output directly to the FP’s RESET pin with a single pullup resistor allows either device to assert reset (Figure 2).

Negative-Going VCC Transients

The MAX16072/MAX16073/MAX16074 family of devices is relatively immune to short-duration, negativegoing VCC transients (glitches). The Typical Operating Characteristics show the Maximum Transient Duration vs. Reset Threshold Overdrive graph, for which reset pulses are not generated. The graph shows the maximum pulse width that a negative-going VCC transient may typically have when issuing a reset signal. As the amplitude of the transient increases, the maximum allowable pulse width decreases.

Table 1. Factory Trimmed Reset Thresholds

THRESHOLD

SUFFIX

15 1.58 1.54 1.61 16 1.63 1.60 1.66 17 1.67 1.62 1.71 18 1.80 1.76 1.85 19 1.90 1.85 1.95 20 2.00 1.95 2.05 21 2.10 2.05 2.15 22 2.20 2.145 2.25 23 2.32 2.262 2.375 24 2.40 2.34 2.46 25 2.50 2.437 2.562 26 2.63 2.564 2.69 27 2.70 2.633 2.768 28 2.80 2.63 2.87 29 2.93 2.857 3.0 30 3.00 2.925 3.075 31 3.08 3.003 3.15

RESET TRIP THRESHOLD (V)

TA = +25NC TA = -40NC to +85NC

TYP MIN MAX

Table 2. Reset Timeout Periods

RESET TIMEOUT PERIODS

SUFFIX MIN TYP MAX UNITS

0 20 80 120 1 8 13 17 ms 2 34 52 69 ms 3 140 210 280 ms

MAX16072/MAX16073/MAX16074

RESET INPUT

µP

68HCXX

GND

MAX16074 MOTOROLA

Figure 2. Interfacing to µP with Bidirectional Reset Pins

RESET

GND

_______________________________________________________________________________________ 7

µP Supervisory Circuits in 4-Bump (1mm x 1mm) Chip-Scale Package

Chip Information

PROCESS: BiCMOS

Package Information

For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.

PACKAGE TYPE PACKAGE CODE DOCUMENT NO.

4 UCSP R41C1-1

21-0242

MAX16072/MAX16073/MAX16074

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.

8 Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

2010 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.

Rainbow Electronics MAX16074 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual