MAX793T Maxim Integrated Products, MAX793T Datasheet

MAX793T

Manufacturer Part Number

MAX793T

Description

Manufacturer

Maxim Integrated Products

Datasheets

1.MAX793RESE.pdf (21 pages)

2.MAX795CSA.pdf (20 pages)

Specifications of MAX793T

Case

SOP

Date_code

08+

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Current page: 1 of 21
Download datasheet (320Kb)

The MAX793/MAX794/MAX795 microprocessor (µP)

supervisory circuits monitor and control the activities of

+3.0V/+3.3V µPs by providing backup-battery switchover,

among other features such as low-line indication, µP

reset, write protection for CMOS RAM, and a watchdog

(see the Selector Guide below). The backup-battery volt-

age can exceed V

batteries in systems using 3.0V to 3.3V for V

The MAX793/MAX795 offer a choice of reset threshold

voltage range (denoted by suffix letter): 3.00V to 3.15V

(T), 2.85V to 3.00V (S), and 2.55V to 2.70V (R). The

MAX794’s reset threshold is set externally with a resistor

divider. The MAX793/MAX794 are available in 16-pin

DIP and narrow SO packages, and the MAX795 comes

in 8-pin DIP and SO packages.

________________________Applications

19-0366; Rev 5; 2/07

Pin Configurations appear at end of data sheet.

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.

_____________________Selector Guide

_______________General Description

Active-Low Reset

Active-High Reset

Programmable Reset

Threshold

Low-Line Early Warning

Output

Backup-Battery

Switchover

External Switch Driver

Power-Fail Comparator

Battery OK Output

Watchdog Input

Battery Freshness Seal

Manual Reset Input

Chip-Enable Gating

Pin-Package

Battery-Powered Computers and Controllers

Embedded Controllers

Intelligent Controllers

Critical µP Power Monitoring

Portable Equipment

FEATURE

________________________________________________________________ Maxim Integrated Products

, permitting the use of 3.6V lithium

16-DIP/SO 16-DIP/SO 8-DIP/SO

MAX793

3.0V/3.3V Adjustable Microprocessor

✔

MAX794

✔

MAX795

✔

MAX793/MAX794/MAX795

♦ Precision Supply-Voltage Monitor:

♦ Guaranteed Reset Assertion to V

♦ Backup-Battery Power Switching—Battery

♦ On-Board Gating of Chip-Enable Signals—7ns

MAX793/MAX794 Only

♦ Battery Freshness Seal

♦ Battery OK Output (MAX793)

♦ Uncommitted Voltage Monitor for Power-Fail or

♦ Independent Watchdog Timer (1.6s timeout)

♦ Manual Reset Input

____________________________Features

Ordering Information continued on last page.

*The MAX793/MAX795 offer a choice of reset threshold voltage.

Select the letter corresponding to the desired reset threshold

voltage range (T = 3.00V to 3.15V, S = 2.85V to 3.00V, R =

2.55V to 2.70V) and insert it into the blank to complete the part

number. The MAX794’s reset threshold is adjustable.

Devices are available in both leaded and lead-free packaging.

Specify lead free by adding the + symbol at the end of the part

number when ordering.

__________Typical Operating Circuit

MAX793_CPE

MAX793_CSE

Voltage Can Exceed V

Max Propagation Delay

Low-Battery Warning

3.6V

PART*

Fixed Reset Trip Voltage (MAX793/MAX795)

Adjustable Reset Trip Voltage (MAX794)

Supervisory Circuits

+5V

3.0V OR 3.3V

+5V SUPPLY

FAILURE

0.1µF

TEMP RANGE

0°C to +70°C

BATT

PFO

PFI

WDO

(OPTIONAL)

SILICONIX

Si9433DY

BATT ON

MAX793

Ordering Information

GND

PMOS

LOWLINE

BATT OK

CE OUT

RESET

CE IN

OUT

WDI

ADDRESS

DECODER

PIN-

PACKAGE

16 Plastic DIP

16 Narrow SO

CMOS

0.1µF

RAM

= 1V

I/O

NMI

A0-A15

RESET

µP

CODE

P16-1

PKG

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