Datasheet ASM1816 Datasheet (Alliance Semiconductor)

Download

Page 1

February 2005

ASM1816

rev 1.4

Low Power 3.3V/3.0V µP Reset, Active LOW, Open-Drain Output

General Description

The ASM1816 is a voltage supervisory device with low-power,

3.3V/3V µP Reset, active LOW, open-drain output. Maximum

supply current over temperature is a low 15µA (at 3.6V).

The ASM1816 generates an active LOW reset signal whenever

the monitored supply is out of tolerance. A precision reference

and comparator circuit monitor power supply (V

Tolerance level options are 5%, 10% and 20%. When an out-of-

tolerance condition is detected, an internal power-fail signal is

generated which forces an active LOW reset signal. After V

returns to an in-tolerance condition, the reset signal remains

active for 150ms to allow the power supply and system

microprocessor to stabilize.

The ASM1816 is designed with a open-drain output stage and

operates over the extended industrial temperature range.

Devices are available in TO-92 and compact surface mount

SOT-23 packages.

CC)

level.

Applications

• Set-top boxes

• Cellular phones

•PDAs

• Energy management systems

• Embedded control systems

• Printers

• Single board computers

Typical Application

ASM1816

RESET

Microprocessor

RESET

Other low power products in this family include the ASM1810/

11/12/15/17, ASM1233D and ASM1233M.

Key Features

• Low Supply Current

•20 µA maximum (5.5 V)

•15µA maximum (3.6 V)

• Automatically restarts a microprocessor after power failure

• 150ms reset delay after V

dition

• Active LOW power-up reset

• Precision temperature-compensated voltage reference and

comparator

• Eliminates external components

• TO-92 and compact surface mount SOT-23 package

• Operating temperature -40°C to +85°C

returns to an in-tolerance con-

Block Diagram

Supply

Tolerance

Bias

Reference

GND

ASM1816

Delay

150ms

Typical

GND

5.0KΩ

RESET

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

Page 2

February 2005

rev 1.4

Pin Configuration

SOT-23

RESET

ASM1816

TO-92

ASM1816

Pin Description

TO-92 SOT-23

Pin # Pin #

1 1 RESET

3 3 GND Ground

ASM1816-R

GND

Pin Name Description

Active LOW reset output

Power supply input

Low Power 3.3V/3.0V µP Reset

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

2 of 9

Page 3

February 2005

rev 1.4

Application Information

Operation - Power Monitor

The ASM1816 detects out-of-tolerance power supply

conditions. It resets a processor during power-up, power-

down and issues a reset to the system processor when the

monitored power supply voltage is below the reset threshold.

When an out-of-tolerance V

RESET signal is asserted. On power-up, RESET is kept

active (LOW) for approximatley 150ms after the power supply

voltage has reached the selected tolerance. This allows the

power supply and microprocessor to stablize before RESET

is released.

(MIN)

CCTP

voltage is detected, the

(MAX)

CCTP

RPD

(MAX)

CCTP

RESET

Figure 2: Timing Diagram: Power-Down

ASM1816

(MIN)

CCTP

RESET

Figure 1: Timing Diagram: Power-Up

RPU

Low Power 3.3V/3.0V µP Reset

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

3 of 9

Page 4

February 2005

rev 1.4

Absolute Maximum Ratings

Parameter Min Max Unit

ASM1816

Voltage on V

Voltage on RESET

Operating Temperature Range -40 85 °C

Soldering Temperature (for 10 sec) 260 °C

Storage Temperature -55 125 °C

-0.5 7 V

-0.5

+ 0.5

ESD rating

HBM

NOTE: These are stress ratings only and functional use is not implied. Exposure to absolute maximum rat-

ings for prolonged periods of time may affect device reliability.

200

Electrical Characteristics

Unless otherwise noted, VCC = 1.2V to 5.5V and specifications are over the operating temperature range of -40°C to +85°C. All voltages are referenced to

ground

Parameter Symbol Conditions Min Typ Max Unit

Supply Voltage

Output Current

Operating Current

Trip Point (ASM1816R-5) V

Trip Point (ASM1816R-10) V

Trip Point (ASM1816R-20) V

Internal Pull-up Resistor

Output Capacitance

Detect to RESET Low t

Slew Rate

(MAX) to V

CCTP

VCC Slew Rate

(MIN) to V

CCTP

Detect to RESET High t

Note: The tF value is for reference in defining values for t

CCTP

(MIN)

(MAX)

CCTP

OUT

RPD

RPU

Output = 0.4V, VCC > 2.7V

VCC < 5.5V, RESET output open

VCC < 3.6V, RESET output open

tr = 5µs

and should not be considered for proper operation or use.

RPD

1.2 5.5 V

+10 mA

820µA

615µA

2.98 3.06 3.15 V

2.80 2.88 2.97 V

2.47 2.55 2.64 V

3.5 5.5 7.5 kΩ

10 pF

25µs

300 µs

0ns

100 150 250 ms

Low Power 3.3V/3.0V µP Reset

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

4 of 9

Page 5

February 2005

rev 1.4

Family Selection Guide

ASM1816

Part # RESET Voltage (V)

ASM1810 4.620, 4.370, 4.120 150 Push-Pull LOW

ASM1811 4.620, 4.350, 4.130 150 Open-Drain LOW

ASM1812 4.620, 4.350, 4.130 150 Push-Pull HIGH

ASM1815 3.060, 2.880, 2.550 150 Push-Pull LOW

ASM1816 3.060, 2.880, 2.550 150 Open-Drain LOW

ASM1817 3.060, 2.880, 2.550 150 Push-Pull HIGH

ASM1233D 4.625, 4.375, 4.125 350 Open-Drain LOW

ASM1233M 4.625, 4.375, 2.720 350 Open-Drain LOW

RESET Time

(ms)

Output Stage RESET Polarity

Low Power 3.3V/3.0V µP Reset

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

5 of 9

Page 6

February 2005

rev 1.4

Package Dimension

Plastic SOT-23 (3-Pin)

ASM1816

Inches Millimeters

Min Max Min Max

Plastic SOT-23 (3-Pin)

A 0.030 0.046 0.75 1.17

A1 0.002 0.006 0.05 0.15

B 0.012 0.020 0.30 0.50

C 0.003 0.008 0.08 0.20

D 0.110 0.120 2.80 3.04

E 0.047 0.055 1.20 1.40

e 0.037 BSC 0.95 BSC

e1 0.075 BSC 1.9 BSC

H 0.083 0.104 2.10 2.64

L 0.016 0.024 0.40 0.60

SNA NA

Low Power 3.3V/3.0V µP Reset

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

6 of 9

Page 7

February 2005

rev 1.4

ASM1816

To-92 (3-Pin)

Dimensions in Inches Dimensions in Millimeters

Min Max Min Max

TO-92

A 0.175 0.185 4.445 4.699

b 0.016 0.020 0.406 0.508

C 0.014 0.016 0.356 0.406

φD 0.175 0.185 4.445 4.699

E 0.138 0.144 3.505 3.658

e 0.098 0.102 2.489 2.591

e1 0.045 0.055 1.143 1.397

j 0.168 0.174 4.269 4.420

L 0.500 0.585 12.7 14.86

s 0.095 0.099 2.413 2.515

Low Power 3.3V/3.0V µP Reset

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

7 of 9

Page 8

February 2005

rev 1.4

Ordering Information

ASM1816

Device Summary

RESET

Part ***

Number

TIN - LEAD DEVICES

ASM1816R-5 3.06 5 150 LOW RMLL

ASM1816R-10 2.88 10 150 LOW RNLL

ASM1816R-20 2.55 20 150 LOW ROLL

LEAD FREE DEVICES

ASM1816R-5F 3.06 5 150 LOW KMLL

ASM1816R-10F 2.88 10 150 LOW KNLL

ASM1816R-20F 2.55 20 150 LOW KOLL

Part ***

Number

TIN - LEAD DEVICES

ASM1816-5 3.06 5 150 LOW ASM1816-5

Output

Voltage

(V)

RESET

Output

Voltage

(V)

RESET

Tolerance

(%)

RESET

Tolerance

(%)

RESET

Time (ms)

RESET

Time (ms)

Open-Drain **

Output Stage

Open-Drain **

Output Stage

SOT-23

Package

TO-92

Package

RESET

Polarity

RESET

Polarity

Package Marking

ASM1816-10 2.88 10 150 LOW ASM1816-10

ASM1816-20 2.55 20 150 LOW ASM1816-20

LEAD FREE DEVICES

ASM1816-5F 3.06 5 150 LOW ASM1816-5F

ASM1816-10F 2.88 10 150 LOW ASM1816-10F

ASM1816-20F 2.55 20 150 LOW ASM1816-20F

** Internal 5.5kΩ resistor pull-up ** *Add /T to Part Number for Tape and Reel (i.e ASM18xx-x/T) LL - Lot Code

Low Power 3.3V/3.0V µP Reset

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

8 of 9

Page 9

ASM1816

Alliance Semiconductor Corporation 2575, Augustine Drive, Santa Clara, CA 95054 Tel: 408 - 855 - 4900 Fax: 408 - 855 - 4999 www.alsc.com

© Copyright 2003 Alliance Semiconductor Corporation. All rights reserved. Our three-point logo, our name and Intelliwatt are trademarks or registered trademarks of Alliance. All other brand and product names may be the trademarks of their respective companies. Alliance reserves the 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 right to change or correct this data at any time, without notice. If the product described herein is under development, significant changes to these specifications are possible. The information in this product data sheet is intended to be general descriptive information for potential customers and users, and is not intended to operate as, or provide, any guarantee or warrantee to any user or customer. Alliance does not assume any responsibility or liability arising out of the application or use of any product described herein, and disclaims any express or implied warranties related to the sale and/or use of Alliance products including liability or warranties related to fitness for a particular purpose, merchantability, or infringement of any intellectual property rights, except as express agreed to in Alliance's Terms and Conditions of Sale (which are available from Alliance). All sales of Alliance products are made exclusively according to Alliance's Terms and Conditions of Sale. The purchase of products from Alliance does not convey a license under any patent rights, copyrights; mask works rights, trademarks, or any other intellectual property rights of Alliance or third parties. Alliance does not authorize its products for use as critical components in life-supporting systems where a malfunction or failure may reasonably be expected to result in significant injury to the user, and the inclusion of Alliance products in such life-supporting systems implies that the manufacturer assumes all risk of such use and agrees to indemnify Alliance against all claims arising from such use.