EM Microelectronic V6309LSP3B, V6309MSP3B, V6309RSP3B, V6309SSP3B, V6309TSP3B Schematic [ru]

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EM MICROELECTRONIC -

3-Pin Microprocessor Reset Circuit

Description

The V6309 and V6319 are microprocessor supervisory
circuits used to monitor the power supplies in µP and digital
systems. They provide excellent circuit reliability and low
cost by eliminating external components and adjustments
when used with 5V powered or 3V powered circuits.

These circuits perform a single function: they assert a reset
signal whenever the V
preset threshold, keeping it asserted for at least 140ms after
VDD has risen above the reset threshold. The only difference
between the two devices is that the V6309 has an active-low
RESET output (which is guaranteed to be in the correct
state for V

down to 1V), while the V6319 has an active-

DD

high RESET output. The reset comparator is designed to
ignore fast transients on V
operation with a variety of supply voltages are available.

Low supply current makes the V6309/V6319 ideal for use in
portable equipment. The V6309/V6319 come in a 3-pin
SOT23 package.

Typical Operating Configuration

V

DD

supply voltage declines below a

DD

. Reset thresholds suitable for

DD

MARIN SA

6309
6319

Features

 Precision monitoring of 3V, 3.3V and 5V power supply

voltages

 Fully specified over the temperature range of

-40 to +125°C

 140ms minimum power-on reset pulse width:

RESET output for V6309
RESET output for V6319

 16 µA supply current

 Guaranteed RESET/RESET valid to V

 Power supply transient immunity

 No external components needed

 3-pin SOT23 package

 Fully compatible with MAX809/MAX810

Applications

 Computer

 Controllers

 Intelligent instruments

 Critical µP and µC power monitoring

 Portable/battery-powered equipment

Pin Assignment

SOT23-3L

V

DD

DD

= 1V

V

DD

V6309

V

SS

RES

V

DD

Micro-

processor

RES

V

SS

V

Fig. 1

Pin Description

Pin Name Function

1 VSS Ground
2 for V6309

RESET

2 for V6319

RESET

3 VDD Supply voltage (+5V, +3.3V or

SS

RESET

V

DD

rises for 240ms after V
reset threshold
RESET Output remains high while
V

DD

rises for 240ms after V
reset threshold

+3.0V)

3

V6309/19

21

RES / RES

Output remains low while

is below the reset threshold and

is below the reset threshold and

above the

DD

above the

DD

Table 1

Fig. 2

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6309

Absolute Maximum Ratings

Parameter Symbol Conditions

Terminal voltage to VSS V
Min. voltage at RESET or

RESET
Maximum voltage at RESET or

RESET
Input current at VDD I

Output current at RESET or

RESET
Rate of rise at VDD t

Stresses above these listed maximum ratings may cause

-0.3V to + 6.0V

DD

permanent damages to the device. Exposure beyond
specified operating conditions may affect device reliability or

V

-0.3V

min

cause malfunction.

V

VCC + 0.3V

max

20 mA

min

I

20 mA

max

100Vµs

R

Handling Procedures

This device has built-in protection against high static
voltages or electric fields; however, it is advised that normal
precautions be taken as for any other CMOS component.
Unless otherwise specified, proper operation can only occur
when all terminal voltages are kept within the voltage range.

6319

Continuous power dissipation at
T

= +70°C for SOT-23

A

320 mW

P

max

(>70°C derate by 4 mW/°C)
Operating temperature range TA -40 to +125°C
Storage temperature range TST -65°C to +150°C

Table 2

Electrical Characteristics

VDD = full range, TA = -40 to +125°C, unless otherwise specified, typical values at TA = +25°C, VDD = 5V for versions L and M,
V

= 3.3V for versions T and S, VDD = 3 V for R. (Production testing done at TA = +25°C and 85°C, over temperature limits

DD

guaranteed by design only)

Parameter Symbol Test Conditions Min. Typ. Max. Unit

VDD range VDD TA = 0 to +70°C 1.0 5.5 V
T
T
Supply current
versions L, M ICC VDD < 5.5V 26 60 µA
versions R, S, T VDD < 3.6V 16 50 µA
RESET threshold 1)
version L VTH TA = +25°C 4.56 4.63 4.70 V
T
version M TA = +25°C 4.31 4.38 4.45 V
T
version T TA = +25°C 3.04 3.08 3.11 V
T
version S TA = +25°C 2.89 2.93 2.96 V
T
version R TA = +25°C 2.59 2.63 2.66 V
T
Reset threshold temp. coefficient -200 ppm/°C

VDD to reset delay 1) V
Reset active timeout period TA = -40 to °125°C 140 330 590 ms

RESET output voltage low for V6309

V

OL

versions R, S, T VDD = VTH min., I
versions L, M VDD = VTH min., I

RESET output voltage high for V6309

versions R, S, T VOH VDD = VTH max., I
versions L, M VDD = VTH max., I
RESET output voltage low for V6319
versions R, S, T VOL VDD = VTH max., I
versions L, M VDD = VTH max., I
RESET output voltage high for V6319 VOH 1.8V < VDD < VTH min.,

1)

RESET output for V6309 , RESET output for V6319

= -40 to +105C 1.2 5.5 V

A

= -40 to +125°C 1.6 5.5 V

A

= -40 to +125°C 4.40 4.79 V

A

= -40 to +125°C 4.16 4.53 V

A

= -40 to +125°C 2.92 3.17 V

A

= -40 to +125°C 2.78 3.02 V

A

= -40 to +125°C 2.50 2.72 V

A

= VTH to (VTH – 100mV) 7 µs

DD

VDD > 1.0V, I

I

= 150µA

SOURCE

= 50µA 0.3 V

SINK

= 1.2mA 0.3 V

SINK

= 3.2mA 0.4 V

SINK

= 500µA 0.8 VDD V

SOURCE

= 800µA VDD-1.5V V

SOURCE

= 1.2mA 0.3 V

SINK

= 3.2mA 0.4 V

SINK

V

0.8 V

DD

Table 3

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Supply Current vs Temperature

No load, V63xxR/S/T

Supply Current vs Temperature

No load, V63xxL/M

6319

Fig. 3

Power-Down Reset Delay vs Temperature

V63xxR/S/T

Power-Down Reset Delay vs Temperature

V63xxL/M

Fig. 6

Power-Up Reset Timeout vs Temperature

All versions

Fig. 4

Fig. 5

Normalized Reset Threshold vs Temperature

All versions

Fig. 7

Fig. 8

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6309

Application Information

Negative-Going VDD Transients

In addition to issuing a reset to the microprocessor during
power-up, power-down and brownout conditions, the
V6309/V6319 are relatively immune to short duration
negative-doing V

transients (glitches). Fig. 8 shows

DD

typical transient duration vs. Reset comparator overdrive,
for which the V6309/V6319 do not generate a reset pulse.
The graph was generated using a negative-going pulse
applied to V

, starting 0.5V above the actual reset

DD

threshold and ending below it by the magnitude indicated
(reset comparator overdrive). The graph indicates the
maximum pulse width a negative-going V

transient can

DD

have without causing a reset pulse. As the magnitude of
the transient increases (goes farther below the reset
threshold), the maximum allowable pulse width decreases.
Typically, for the V6309L and V6319M, a V

transient that

DD

goes 100V below the reset threshold and lasts 20µs or less
will not cause a reset pulse. A 0.1µF bypass capacitor
mounted as close as possible to the V

pin provides

DD

additional transient immunity.

Max. Transient Duration without causing a Reset Pulse
versus Reset Comparator Overdrive

6319

RESET Valid for VDD = Ground Circuit

V

DD

RES

V6309

V

SS

Interfacing to µPs with Bidirectional Reset Pins

Microprocessors with bidirectional reset pins (such as the
Motorola 68HC11 series) can connect to the V6309 reset

output. If, for example, the V6309
asserted high and the µP wants to pull it low, indeterminate
logic levels may result. To correct this, connect a 4.7 k
resistor between the V6309

(Fig. 11). Buffer the V6309

RESET

RESET

components.

Interfacing to µPs with Bidirectional Reset I/O

Buffer

100 kΩ

RESET

and the µP reset I/O

output to other system

Buffer RES to

other system

components

Fig. 10

output is

Ω

Fig .9

Ensuring a Valid Reset Output down to VDD = 0V

When V

falls below 1V, the V6309

DD

RESET

output no
longer sinks current, it becomes an open circuit.
Therefore, high-impedance CMOS logic inputs connected
to

RESET

can drift to undetermined voltages. This

presents no problem in most applications, since most µP
and other circuitry is inoperative with V

However, in applications where

RESET

down to 0V, adding a pull-down resistor to

below 1V.

DD

must be valid

RESET

causes

any stray leakage currents to flow to ground, holding

RESET

large enough not to load

RESET

low (Fig. 10). R1's value is not critical; 100 kΩ is

RESET

to ground. A 100 kΩ pull-up resistor to V

and small enough to pull

is also

DD

recommended for the V6319, if RESET is required to
remain valid for V

< 1V.

DD

V

DD

V6309

V

SS

RES

4.7 kO

4.7k

RES

V

V

DD

µP

SS

Fig. 11

Benefits of Highly Accurate Reset Threshold

Most µP supervisor ICs have reset threshold voltages
between 5% and 10% below the value of nominal supply
voltages. This ensures a reset will not occur within 5% of
the nominal supply, but will occur when the supply is 10%
below nominal. When using ICs rated at only the nominal
supply ±5%, this leaves a zone of uncertainty where the
supply is between 5% and 10% low, and where the reset
may or may not be asserted.
The V6209/T and V6319/T use highly accurate circuitry to
ensure that reset is asserted close to the 5% limit, and long
before the supply has declined to 10% below nominal.

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Packaging and Ordering Information

Dimensions of SOT23-3L Package

D

B

e

e1

A1A2A

SOT23-3L

6319

E

C

L

H

SYMBOL MIN TYP MAX

A0.891.041.12
A1 0.013 0.10
A2 0.95 0.97 1.00
B0.37 0.51
C 0.085 0.12 0.18
D2.802.953.04
E1.201.321.40
e0.95
e1 1.78 1.90 2.05
H2.102.402.64
L0.55

Dimensions are in mm

Ordering Information

When ordering, please always specify the complete Part Number. Please contact EM Microelectronic for availability.

Part Number Threshold

Voltage

Output Type Package &

Delivery Form

Top Marking 1)

with 4 Characters

Top Marking 2)

with 3 Characters

V6309RSP3B 2.63V AEAR ER#
V6309SSP3B 2.93V AEAS ES#
V6309TSP3B 3.08V AEAT ET#
V6309MSP3B 4.38V AEAM EM#

Active low

push-pull

V6309LSP3B 4.63V

SOT23-3L,

Tape & Reel

3000 pces

AEAL EL#
V6319RSP3B 2.63V AFAR FR#
V6319SSP3B 2.93V AFAS FS#
V6319TSP3B 3.08V AFAT FT#
V6319MSP3B 4.38V AFAM FM#

Active high

push-pull

V6319LSP3B 4.63V

1)

Top marking with 4 characters is standard from 2003. For lead-free/green mold (RoHS) parts, the first letter of top marking

with 4 characters begins with letter "B" instead of letter "A".

2)

Top marking with 3 characters is kept as information since it was used until 2002. Where # refers to the lot number (EM

SOT23-3L,

Tape & Reel

3000 pces

AFAL FL#

internal reference only)

RoHS Compliance Information

This product is also available in a lead-free/green mold package. Please add a "+" symbol at the end of the Part Number when
ordering to receive a lead-free equivalent (eg. V6309LSP3B+). Top marking of lead-free/green mold V6309 parts always begins
with letter "B" instead of "A".

Traceability for Small Packages

Due to the limited space on the package surface, the bottom marking contains a limited number of characters that provide only
partial information for lot traceability. Full information for complete traceability is however provided on the packing labels of the
product at delivery from EM. It is highly recommended that the customer insures full lot traceability of EM product in his final
product.

EM Microelectronic-Marin SA (EM) makes no warranty for the use of its products, other than those expressly contained in the Company's
standard warranty which is detailed in EM's General Terms of Sale located on the Company's web site. EM assumes no responsibility for
any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without
notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property
of EM are granted in connection with the sale of EM products, expressly or by implications. EM's products are not authorized for use as
components in life support devices or systems.

©

EM Microelectronic-Marin SA, 02/05, Rev. F

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