ASM706JCUA - Alliance Semiconductor

Alliance Semiconductor

2575 Augustine Drive . Santa Clara, CA 95054 . Tel: 408.855.4900 . Fax: 408.855.4999 . www.alsc.com

Notice: The information in this document is subject to change without notice

October 2003

rev 1.0 3/3.3/4.0 V µP Supervisor Circuits

ASM706 P/ R/ S/ T/ J

ASM708 R/ S/ T/ J

General Description

The ASM706P/R/S/T/J and ASM708R/S/T/J are cost effective

CMOS supervisor circuits that monitor power-supply and

battery voltage level, and µP/µC operation.

The family offers several functional options. Each device

generates a reset signal during power-up, power-down and

during brownout conditions. A reset is generated when the

supply drops below 2.63V (ASM706P/R, ASM708R), 2.93V

(ASM706S, ASM708S), 3.08V (ASM706T, ASM708T) or 4.00

(ASM706J, ASM708J). In addition, the ASM706P/R/S/T/J

feature a 1.6 second watchdog timer. The watchdog timer

output will trigger a reset if connected to MR. Floating the WDI

input pin disables the watchdog timer.

The ASM708R/S/T/J have both active-HIGH and active-LOW

reset outputs but no watchdog function. The ASM706P has the

same pin-out and functions as the ASM706R but has an active-

HIGH reset output.

A versatile power-fail circuit, useful in checking battery levels

and non-5V supplies, has a 1.25V threshold. All devices have a

manual reset input. All devices are available in 8-pin DIP, SO

and the compact MicroSO packages. The MicroSO package

requires 50% less PC board area than the conventional SO

package.

Features

• Precision power supply minotor

•2.63V threshold (ASM706P/R, ASM708R)

•2.93V threshold (ASM706S, ASM708S)

•3.08V threshold (ASM706T, ASM708T)

•New 4.00V threshold (ASM706J , ASM708J)

• Debounced manual reset input

• Auxiliary voltage monitor comparator

•1.25V threshold

•Battery monitor / auxiliary supply monitor

• Watchdog timer (ASM706P/R/S/T/J)

•Watchdog can be disabled by floating WDI

• 200ms reset time delay

• Three reset signal options

•Active HIGH: ASM706P

•Active LOW: ASM706R/S/T/J

•Active HIGH and LOW outputs: ASM708R/S/T/J

• DIP, SO and MicroSO packages

• Guaranteed RESET assertion to VCC = 1.1V

Applications

• Computers and embedded controllers

• CTI applications

• Automotive systems

• Portable/Battery-operated systems

• Intelligent instruments

• Wireless communication systems

• PDAs and hand-held equipment

• Safety systems

Typical Operating Circuit

+3.3V Regulator

VCC

PFI

(RESET)

WDI

WDO

PFO

VCC

(RESET)

I/O LINE

NMI

INTERRUPT

Unregulated DC

µP

ASM706 R/S/T

ASM708 R/S/T

(ASM706 P)

RESET RESET

ASM706 P/ R/ S/ T/ J

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3/3.3/4.0 V µP Supervisor Circuits

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October 2003

rev 1.0

Block Diagrams

Pin Configuration

RESET RESET

VCC

PFI

PFO

GND

Generator

VCC

20kΩ

ASM708R/S/T/J

2.63V (ASM708R)

2.93V (ASM708S)

3.08V (ASM708T)

4.00V (ASM708J)

1.25V

RESET

Transition Watchdog

Timebase

RESET

WDI WDO

RESET

(RESET) ASM706P

VCC

PFI

PFO

GND

Detector Timer

Generator

VCC

20kΩ

ASM706P/R/S/T/J

2.63V (ASM706P/R)

2.93V (ASM706S)

3.08V (ASM706T)

4.00V (ASM706J)

1.25V

GND

PFI

RESET

PFO

8MR

GND

PFI

RESET

PFO

8MR

GND

PFI

RESET

PFO

GND

PFI

RESET

PFO

WDI

WDO WDO

WDI

WDO

WDI

GND

PFI

RESET

PFO

RESET

(RESET)

(ASM706P)

DIP/SO MicroSO

ASM708R/S/T/J

ASM706P

ASM706R/S/T/J

ASM706P

ASM706R/S/T/J

ASM708R/S/T/J

ASM706 P/ R/ S/ T/ J

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rev 1.0

Pin Description

Pin Number

Name Function

ASM706P ASM706R/S/T/J ASM708R/S/T/J

DIP/

SO MicroSO DIP/

SO MicroSO

131313 MR

Manual reset input. The active LOW input triggers

a reset pulse. It is pulled HIGH by a 20kΩ pull-up

resistor. It is compatible with TTL/CMOS signals

when VCC = 5V. It can be shorted to ground

through a mechanical switch. Leave folating or

connect to VCC if the function is not used.

242424VCC Monitored power supply input.

353535GNDGround.

464646 PFI

Power-fail input voltage monitor. With PFI less

than 1.25V, PFO goes LOW. Connect PFI to

Ground when not in use.

575757PFO

Power-fail output. The output is active LOW and

sinks current when PFI is less than 1.25V. If not

used, leave the pin unconnected.

6868 - -WDI

Watchdog input. WDI controls the internal watch-

dog timer. A HIGH or LOW signal for 1.6sec at

WDI allows the internal timer to run-out, setting

WDO low. A rising or falling edge must occur at

WDI within 1.6 seconds or WDO goes LOW. The

watchdog function is disabled by floating WDI. The

internal watchdog timer clears when: RESET is

asserted; WDI is three-stated ; or WDI sees a ris-

ing or falling edge.

- - - - 6 8 NC Not Connected

- - 7 1 7 1 RESET

Active LOW reset output. Pulses LOW for 200ms

when triggered, and stays LOW whenever VCC is

below the reset threshold. RESET remains LOW

for 200ms after VCC rises above the reset thresh-

old or MR goes from HIGH to LOW. A watchdog

timeout will not trigger RESET unless WDO is con-

nected to MR.

ASM706 P/ R/ S/ T/ J

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rev 1.0

8282 - -WDO

Watchdog output. WDO goes LOW when the 1.6

second interval watchdog timer times-out and

does not go HIGH until a transition occurs at WDI.

In addition, when VCC falls below the reset thresh-

old, WDO goes LOW. Unlike RESET, WDO does

not have a minimum pulse width and as soon as

VCC exceeds the reset threshold, WDO becomes

HIGH with no delay.

7 1 - - 8 2 RESET Active HIGH reset output. The inverse of RESET

Pin Number

Name Function

ASM706P ASM706R/S/T/J ASM708R/S/T/J

DIP/

SO MicroSO DIP/

SO MicroSO

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3/3.3/4.0 V µP Supervisor Circuits

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ASM708 R/ S/ T/ J

October 2003

rev 1.0

Detailed Descriptions

A proper reset input enables a microprocessor/

microcontroller to start in a known state. ASM706 P/ R/ S/ T/

J and ASM708 R/ S/ T/ J assert reset to prevent code

execution errors during power-up, power-down and brown-

out conditions.

RESET/RESET Operation

The RESET/RESET signals are designed to start or return a

µP/µC to a known state.

With VCC above 1.2V, RESET and RESET are guaranteed to

be asserted. During a power-up sequence, the reset outputs

remain asserted until the supply rises above the threshold

level. The resets are deasserted approximately 200ms after

crossing the threshold.

In a brownout situation where VCC falls below the threshold

level, the reset outputs are asserted. If a brownout occurs

during an already initiated reset period, the reset period will

extend for an additional reset period of 200ms.

The ASM708 devices have dual reset outputs, one active

LOW and one active HIGH. The ASM706P has a single

active HIGH reset and the ASM706/R/S/T/J devices have an

active LOW reset output.

Manual Reset (MR)

The active-LOW manual reset input is pulled high by an

internal 20kΩ pull-up resistor and can be driven low by

CMOS/TTL logic or a mechanical switch to ground. An

external debounce circuit is

unnecessary since the 140ms minimum reset time will

debounce mechanical pushbutton switches. The minimum

MR input pulse width is 0.5µs with a 3V VCC input and 0.15µs

with a 5V VCC input. If not used, tie MR to VCC or leave

floating.

By connecting the watchdog output (WDO) and MR, a

watchdog timeout forces a RESET to be generated.

Watchdog Timer

A watchdog timer available on the ASM706P/R/S/T/J

monitors µP/µC activity. An output line on the processor is

used to toggle the WDI line. If the line is not toggled within 1.6

seconds on the Watchdog Input (WDI), the internal timer puts

the Watchdog Output (WDO) into a LOW state. WDO will

remain LOW until a toggle is detected at WDI.

The watchdog function is disabled, meaning it is cleared and

not counting, if WDI is floated or connected to a three-stated

circuit. The watchdog timer is also disabled if RESET is

asserted. When RESET becomes inactive and the WDI input

sees a high or low transition as short as 100ns (VCC = 2.7V)/

Alliance

Part #

RESET

Polarity Threshold Watchdog

Timer

ASM706P HIGH 2.63V YES

ASM706R LOW 2.63V YES

ASM706S LOW 2.93V YES

ASM706T LOW 3.08V YES

ASM706J LOW 4.00V YES

ASM708R HIGH & LOW 2.63V NO

ASM708S HIGH & LOW 2.93V NO

ASM708T HIGH & LOW 3.08V NO

ASM708J HIGH & LOW 4.00V NO

Figure 1: WDI Three-state operation

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3/3.3/4.0 V µP Supervisor Circuits

ASM706 P/ R/ S/ T/ J

ASM708 R/ S/ T/ J

October 2003

rev 1.0

50ns (VCC = 4.5V), the watchdog timer will begin a 1.6

second countdown. Additional transitions at WDI will reset

the watchdog timer and initiate a new countdown sequence.

WDO will also become LOW and remain so, whenever the

supply voltage, VCC, falls below the device threshold level.

WDO goes HIGH as soon as VCC transitions above the

threshold. There is no minimum pulse width for WDO as

there is for the RESET outputs. If WDI is floated, WDO

essentially acts as a low supply voltage output indicator.

Power-failure Detection With Auxiliary Comparator

All devices have an auxiliary comparator with 1.25V trip point.

The output, PFO, is active LOW and the noninverting input is

PFI. This comparator can be used as a supply voltage

monitor with an external resistor voltage divider. As the

monitored voltage level falls, PFI is reduced causing the PFO

output to go LOW. Normally PFO interrupts the processor so

the system can be shut down in a controlled manner.

Application Information

Bi-directional Reset Pin Interfacing

The ASM706/8 can interface with µP/µC bi-directional reset

pins by connecting a 4.7kΩ resistor in series with the RESET

output and the µP/µC bi-directional reset pin.

Ensuring the RESET is Valid Down to VCC = 0V

When VCC falls below 1.2V, the ASM706R/S/T/J and 708R/S/

T/J RESET reset outputs no longer pull down; it becomes

indeterminate. To avoid the possibility that stray charges

could build up and force RESET to the wrong state, a pull-

down resistor should be connected to the RESET pin, thus

draining such charges to ground. The resistor value is not

critical. A100kΩ resistor will pull RESET to ground without

loading it.

Figure 2: Watchdog timing

Supply Voltage

BUF Buffered

RESET

ASM70x

GND GND

RESET RESET

Input

µC or µP

4.7k

Ω

Bi-directional I/O Pin

Figure 3: Bi-directional reset pin interfacing

ASM706 P/ R/ S/ T/ J

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October 2003

rev 1.0

Monitoring Voltages Other Than VCC

Absolute Maximum Ratings

Parameter Min Max Unit

Pin Terminal Voltage with Respect to Ground

VCC -0.3 6.0 V

All other inputs -0.3 VCC + 0.3 V

Input Current at VCC and GND 20 mA

Output Current: All outputs 20 mA

Rate of Rise at VCC 100 V/µs

Plastic DIP Power Dissipation

(Derate 9mW/°C above 70°C) 700 mV

SO Power Dissipation

(Derate 5.9mW/°C above 70°C) 470 mW‘

MicroSO POwer Disspation

(Derate 4.1mW/°C above 70°C) 330 mW

Operating Temperature Range

ASM706xE, ASM708xE -40 +85 °C

ASM706xC, ASM708xC 0 70 °C

Storage Temperature Range -65 160 °C

Lead Temperature Soldering (10sec) 300 °C

Note: These are stress ratings only and functional operation is noy implied. Exposure to absolute maximum ratings for pro-

longed time periods may affect device reliability.

The ASM706/708 can monitor voltages other than VCC using

the Power Fail circuitry. If a resistive divider is connected from

the voltage to be monitored to the PFI input, the PFO will go

LOW if the voltage at PFI goes below 1.25V reference. Should

hysteresis be desired, connect a resistor (equal to

approximately 10 times the sum of the two resistors in the

divider) between the PFI and PFO pins. A capacitor between

PFI and GND will reduce circuit sensitivity to input high

frequency noise. If it is desired to assert a reset in addition to

the PFO flag, this may be achieved by connecting the PFO

output to MR.

VCC

PFI

PFO

VIN

ASM70X

RESET

GND

+5V

µP

Figure 4: Monitoring +5V and an additional supply VIN

ASM706 P/ R/ S/ T/ J

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October 2003

rev 1.0

Electrical Characteristics

Unless otherwise noted, specifications are over the operating temperature range and VCC supply voltages are 2.7V to 5.5V (ASM706P,

ASM708R), 3.0 V to 5.5V (ASM706/708S), 3.15V to 5.5V (ASM706/708T) and 4.1V to 5.5.V (ASM706/708J)

Parameter Symbol Conditions Min Typ Max Unit

Operating Voltage

Range VCC

ASM706xC, ASM708xC 1.1 5.5

ASM706xE, ASM708xE 1.2 5.5

Supply Current

VCC < 3.6V ICC

ASM706xC, ASM706xE, MR = VCC, WDI Float-

ing 75 140

µA

ASM708xC, ASM708xE, MR = VCC, WDI Float-

ing 50 140

Supply Current

VCC < 5.5V ICC

ASM706xC, ASM706xE, MR = VCC, WDI Float-

ing 75 140

µA

ASM708xC, ASM708xE, MR = VCC, WDI Float-

ing 50 140

RESET Threshold VRT

P and R devices 2.55 2.63 2.70

S devices 2.85 2.93 3.00

T devices 3.00 3.08 3.15

J devices 3.89 4.00 4.10

RESET Threshold

Hysteresis 40 mV

RESET Pulse Width tRS

VCC = 3V (ASM706/8, P/R devices).

VCC = 3.3V (ASM706/8, S/T devices). 140 200 280

VCC = 4.4V (ASM706/8, J devices).

VCC = 5V 200

MR Pulse Width tMR

4.5V < VCC < 5.5V 150

3.6V < VCC < 4.5V (ASM706/8J devices)

VRST (MAX) < VCC < 3.6V

(ASM706/8/P/R/S/T devices)

500

MR to RESET Out

Delay tMD

3.6V < VCC < 4.5V (AS706/8J devices)

VRST (MAX) < VCC < 3.6V

(ASM706/8/P/R/S/T devices)

750

4.5V < VCC < 5.5V 250

ASM706 P/ R/ S/ T/ J

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rev 1.0

MR Input Threshold

VIH VRST(MAX) < VCC < 4.5V 0.7VCC

VIL VRST(MAX) < VCC < 4.5V 0.6

VIH 4.5V < VCC < 5.5V 2.0

VIL 4.5V < VCC < 5.5V 0.8

MR Pullup resistor RP10 20 40 kΩ

RESET Output Volt-

age

(All R/S/T/J devices)

VOH ISOURCE = 800µA, 4.5V < VCC < 5.5V VCC - 1.5

VOL ISINK = 3.2mA, 4.5V < VCC < 5.5V 0.4

VOH ISOURCE=500µA, VRST(MAX) < VCC < 4.5V 0.8VCC

VOL ISINK =1.2mA, VRST(MAX) < VCC < 4.5V 0.3

VOL

ISINK = 50µA, VCC = 1.1V (ASM706xC,

ASM708xC devices) 0.3

ISINK =100µA, VCC = 1.2V (ASM706xE,

ASM708xE devices) 0.3

RESET Output Volt-

age

ASM706P

VOH ISOURCE = 800µA, 4.5V < VCC < 5.5V VCC - 1.5

VOL ISINK = 3.2mA, 4.5V < VCC < 5.5V 0.4

VOH ISOURCE=500µA, VRST(MAX) < VCC <3.6V 0.8VCC

VOL ISINK =1.2mA, VRST(MAX) < VCC < 3.6V 0.3

RESET Output Volt-

age

ASM708R/S/T/J

VOH ISOURCE = 800µA, 4.5V < VCC < 5.5V VCC - 1.5

VOL ISINK = 3.2mA, 4.5V < VCC < 5.5V 0.4

VOH ISOURCE=500µA, VRST(MAX) < VCC < 4.5V 0.8VCC

VOL ISINK =1.2mA, VRST(MAX) < VCC < 4.5V 0.3

Watchdog Timeout

Period tWD

VCC = 3V (ASM706, P/R devices).

VCC = 3.3V (ASM706 S/T devices). 1.0 1.6 2.25

VCC = 4.4V (ASM706, J devices).

WDI Pulse Width tWP

VIL = 0.4V, VIH=0.8VCC,

VRST(MAX) < VCC < 4.5V 100

VIL = 0.4V, VIH=0.8VCC,

4.5V < VCC < 5.5V 50

Parameter Symbol Conditions Min Typ Max Unit

ASM706 P/ R/ S/ T/ J

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rev 1.0

WDI Input Threshold

VIH VCC = 5V 3.5

VIL 0.8

VIH VRST(MAX) < VCC < 4.5V 0.7VCC

VIL 0.6

WDI Input Current

WDI = VCC, ASM706 only 50 150

µA

WDI = 0V, ASM706 only -150 -50

WDO Output Voltage

VOH ISOURCE = 800µA, 4.5V < VCC < 5.5V VCC - 1.5

VOL ISINK = 1.2mA, 4.5V < VCC < 5.5V 0.4

VOH ISOURCE=500µA, VRST(MAX) < VCC < 4.5V 0.8VCC

VOL ISINK =1.2mA, VRST(MAX) < VCC < 4.5V 0.3

PFI Input Threshold PFI falling. For P/R devices VCC = 3V. For S/T

devices VCC = 3.3V. For J devices VCC = 4.4V 1.2 1.25 1.3 V

PFI Input Current -25 0.01 25 nA

PFO Output Voltage

VOH ISOURCE = 800µA, 4.5V < VCC < 5.5V VCC - 1.5

VOL ISINK = 3.2mA, 4.5V < VCC < 5.5V 0.4

VOH ISOURCE=500µA, VRS(MAX) < VCC < 4.5V 0.8VCC

VOL ISINK =1.2mA, VRS(MAX) < VCC < 4.5V 0.3

Parameter Symbol Conditions Min Typ Max Unit

ASM706 P/ R/ S/ T/ J

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rev 1.0

Package Dimensions

MicroSO(8-pin)

Inches Millimeters

Min Max Min Max

A - 0.0433 - 1.10

A1 0.0020 0.0059 0.050 0.15

A2 0.0295 0.0374 0.75 0.95

b 0.0098 0.0157 0.25 0.40

C 0.0051 0.0091 0.13 0.23

D 0.1142 0.1220 2.90 3.10

e 0.0256 0.65BS

E 0.193B 4.90BS

E1 0.1142 0.1220 2.90 3.10

L 0.0157 0.0276 0.40 0.70

a 0°6°0°6°

SO(8-pin)

Inches Millimeters

Min Max Min Max

A 0.053 0.069 1.35 1.75

A1 0.004 0.010 0.10 0.25

B 0.013 0.020 0.33 0.51

C 0.007 0.010 0.19 0.25

e 0.050 1.27

E 0.150 0.157 3.80 4.00

H 0.228 0.244 5.80 6.20

L 0.016 0.50 0.40 1.27

D 0.189 0.197 4.80 2.00

ASM706 P/ R/ S/ T/ J

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rev 1.0

Inches Millimeters

Min Max Min Max

A - 0.210 - 5.33

A1 0.015 - 0.38 -

A2 0.115 0.195 2.92 4.95

b 0.014 0.022 0.36 0.56

b2 0.045 0.070 1.14 1.78

b3 0.030 0.045 0.080 1.14

D 0.355 0.400 9.02 10.16

D1 0.005 - 0.13 -

E 0.300 0.325 7.62 8.26

E1 0.240 0.280 6.10 7.11

e0.100- 2.54

eA 0.300 - 7.62

eB - 0.430 - 10.92

eC - 0.060

L 0.115 0.150 2.92 3.81

Plastic DIP(8-pin)

ASM706 P/ R/ S/ T/ J

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3/3.3/4.0 V µP Supervisor Circuits

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rev 1.0

Ordering Codes

Part Number Package

Operating

Temperature

Range (°C)

Reset

Threshold Reset Polarity Watchdog

Timer

ASM706PCPA 8- Plastic DIP 0 to +70 2.63 HIGH YES

ASM706PCSA 8-SO 0 to +70 2.63 HIGH YES

ASM706PCUA 8-MicroSO 0 to +70 2.63 HIGH YES

ASM706PEPA 8-Plastic DIP -40 to +85 2.63 HIGH YES

ASM706PESA 8-SO -40 to +85 2.63 HIGH YES

ASM706RCPA 8- Plastic DIP 0 to +70 2.63 LOW YES

ASM706RCSA 8-SO 0 to +70 2.63 LOW YES

ASM706RCUA 8-MicroSO 0 to +70 2.63 LOW YES

ASM706REPA 8-Plastic DIP -40 to +85 2.63 LOW YES

ASM706RESA 8-SO -40 to +85 2.63 LOW YES

ASM706SCPA 8- Plastic DIP 0 to +70 2.93 LOW YES

ASM706SCSA 8-SO 0 to +70 2.93 LOW YES

ASM706SCUA 8-MicroSO 0 to +70 2.93 LOW YES

ASM706SEPA 8-Plastic DIP -40 to +85 2.93 LOW YES

ASM706SESA 8-SO -40 to +85 2.93 LOW YES

ASM706TCPA 8- Plastic DIP 0 to +70 3.08 LOW YES

ASM706TCSA 8-SO 0 to +70 3.08 LOW YES

ASM706TCUA 8-MicroSO 0 to +70 3.08 LOW YES

ASM706TEPA 8-Plastic DIP -40 to +85 3.08 LOW YES

ASM706TESA 8-SO -40 to +85 3.08 LOW YES

ASM706JCPA 8- Plastic DIP 0 to +70 4.00 LOW YES

ASM706JCSA 8-SO 0 to +70 4.00 LOW YES

ASM706JCUA 8-MicroSO 0 to +70 4.00 LOW YES

ASM706JEPA 8-Plastic DIP -40 to +85 4.00 LOW YES

ASM706JESA 8-SO -40 to +85 4.00 LOW YES

ASM708RCPA 8- Plastic DIP 0 to +70 2.63 Dual: HIGH & LOW NO

ASM708RCSA 8-SO 0 to +70 2.63 Dual: HIGH & LOW NO

ASM708RCUA 8-MicroSO 0 to +70 2.63 Dual: HIGH & LOW NO

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rev 1.0

ASM708REPA 8-Plastic DIP -40 to +85 2.63 Dual: HIGH & LOW NO

ASM708RESA 8-SO -40 to +85 2.63 Dual: HIGH & LOW NO

ASM708SCPA 8- Plastic DIP 0 to +70 2.93 Dual: HIGH & LOW NO

ASM708SCSA 8-SO 0 to +70 2.93 Dual: HIGH & LOW NO

ASM708SCUA 8-MicroSO 0 to +70 2.93 Dual: HIGH & LOW NO

ASM708SEPA 8-Plastic DIP -40 to +85 2.93 Dual: HIGH & LOW NO

ASM708SESA 8-SO -40 to +85 2.93 Dual: HIGH & LOW NO

ASM708TCPA 8- Plastic DIP 0 to +70 3.08 Dual: HIGH & LOW NO

ASM708TCSA 8-SO 0 to +70 3.08 Dual: HIGH & LOW NO

ASM708TCUA 8-MicroSO 0 to +70 3.08 Dual: HIGH & LOW NO

ASM708TEPA 8-Plastic DIP -40 to +85 3.08 Dual: HIGH & LOW NO

ASM708TESA 8-SO -40 to +85 3.08 Dual: HIGH & LOW NO

ASM708JCPA 8- Plastic DIP 0 to +70 4.00 Dual: HIGH & LOW NO

ASM708JCSA 8-SO 0 to +70 4.00 Dual: HIGH & LOW NO

ASM708JCUA 8-MicroSO 0 to +70 4.00 Dual: HIGH & LOW NO

ASM708JEPA 8-Plastic DIP -40 to +85 4.00 Dual: HIGH & LOW NO

ASM708JESA 8-SO -40 to +85 4.00 Dual: HIGH & LOW NO

Part Number Package

Operating

Temperature

Range (°C)

Reset

Threshold Reset Polarity Watchdog

Timer

ASM706 P/ R/ S/ T/ J

15 of 16

Notice: The information in this document is subject to change without notice

3/3.3/4.0 V µP Supervisor Circuits

ASM708 R/ S/ T/ J

October 2003

rev 1.0

Feature Summary

ASM706P ASM706R ASM706S ASM706

TASM706J ASM708R ASM708S ASM708T ASM708J

Power fail

detector 

Brownout

detection 

Debounced

Manual

RESET



Power-up/

down RESET 

Watchdog

Timer 

Active HIGH

RESET 

Active LOW

RESET 

Active LOW

and HIGH

RESETs



RESET

Threshold (V) 2.63 2.63 2.93 3.08 4.00 2.63 2.93 3.08 4.00

Alliance Semiconductor Corporation

2575, Augustine Drive,

Santa Clara, CA 95054

Tel: 408 - 855 - 4900

Fax: 408 - 855 - 4999

www.alsc.com

Part Number: ASM706 P/ R/ S/ T/ J

ASM708 R/ S/ T/ J

Document Version: 1.0

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right to make changes to this document and its products at any time without notice. Alliance assumes no responsibility for any errors that may

appear in this document. The data contained herein represents Alliance's best data and/or estimates at the time of issuance. Alliance reserves the

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ASM706 P/ R/ S/ T/ J

ASM708 R/ S/ T/ J