CAT1021RA-25TE13 datasheet, PDF

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CAT1021RA-25TE13: DescriptionPower Supply Management Circuit, Fixed, 1 Channel, CMOS, PDSO8, MSOP-8; CategoryPower/power management The power supply circuit; File Size107KB，17 Pages; ManufacturerCatalyst; Websitehttp://www.catalyst-semiconductor.com/

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CAT1021RA-25TE13 Overview

Power Supply Management Circuit, Fixed, 1 Channel, CMOS, PDSO8, MSOP-8

CAT1021RA-25TE13 Parametric

Parameter Name	Attribute value
Is it Rohs certified?	incompatible
Parts packaging code	MSOP
package instruction	TSSOP,
Contacts	8
Reach Compliance Code	unknow
ECCN code	EAR99
Adjustable threshold	NO
Analog Integrated Circuits - Other Types	POWER SUPPLY MANAGEMENT CIRCUIT
JESD-30 code	R-PDSO-G8
JESD-609 code	e0
Humidity sensitivity level	1
Number of channels	1
Number of functions	1
Number of terminals	8
Maximum operating temperature	105 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	TSSOP
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	240
Certification status	Not Qualified
Maximum seat height	1.1 mm
Maximum supply voltage (Vsup)	5.5 V
Minimum supply voltage (Vsup)	2.7 V
Nominal supply voltage (Vsup)	3 V
surface mount	YES
technology	CMOS
Temperature level	INDUSTRIAL
Terminal surface	TIN LEAD
Terminal form	GULL WING
Terminal pitch	0.65 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	30
width	3 mm
Base Number Matches	1

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Preliminary Information

CAT1021, CAT1022, CAT1023

Supervisory Circuits with I

C Serial 2K CMOS EEPROM, Manual Reset

and Watchdog Timer

FEATURES

Precision power supply voltage monitor

Built-in inadvertent write protection

— 5V, 3.3V and 3V systems

— Five threshold voltage options

Watchdog timer

Active high or low reset

— WP pin (CAT1021)

1,000,000 Program/Erase cycles

Manual reset input

100 year data retention

8-pin DIP, SOIC, TSSOP, TDFN (MSOP

— Valid reset guaranteed at V

=1V

400kHz I

C bus

2.7V to 5.5V operation

Low power CMOS technology

16-Byte page write buffer

(3x4.9mm) & 3x3mm foot prints) or MSOP

packages

— TDFN max height is 0.8mm

Automotive, extended automotive and

industrial temperature ranges

DESCRIPTION

The CAT1021, CAT1022 and CAT1023 are complete

memory and supervisory solutions for microcontroller-

based systems. A 2kbit serial EEPROM memory and a

system power supervisor with brown-out protection are

integrated together in low power CMOS technology.

Memory interface is via a 400kHz I

C bus.

The CAT1021 and CAT1023 provide a precision V

sense circuit and two open drain outputs: one (RESET)

drives high and the other (RESET) drives low whenever

falls below the reset threshold voltage. The CAT1021

also has a Write Protect input (WP). Write operations

are disabled if WP is connected to a logic high.

The CAT1022 has a

RESET

output and does not have

a Write Protect input.

All supervisors have a 1.6 second watchdog timer circuit

that resets a system to a known state if software or a

hardware glitch halts or “hangs” the system. For the

CAT1021 and CAT1022, the watchdog timer monitors

the SDA signal. The CAT1023 has a separate watchdog

timer interrupt input pin, WDI.

The power supply monitor and reset circuit protect memory

and system controllers during power up/down and against

brownout conditions. Five reset threshold voltages support

5V, 3.3V and 3V systems. If power supply voltages are out

of tolerance reset signals become active, preventing the

system microcontroller, ASIC or peripherals from operating.

Reset signals become inactive typically 200 ms after the

supply voltage exceeds the reset threshold level. With both

active high and low reset signals, interface to microcontrollers

and other ICs is simple. In addition, the

RESET

pin or a

separate input,

MR,

can be used as an input for push-button

manual reset capability.

The on-chip, 2k EEPROM memory features a 16-byte page.

In addition, hardware data protection is provided by a V

sense circuit that prevents writes to memory whenever V

falls below the reset threshold or until V

reaches the reset

threshold during power up.

Available packages include an 8-pin DIP and surface mount

8-pin SO, 8-pin TSSOP, 8-pin TDFN and 8-pin MSOP

packages. The TDFN package thickness is 0.8mm maximum.

TDFN footprint options are 3x3mm or 3x4.9mm (MSOP pad

layout).

Characteristics subject to change without notice

Doc No. 3009, Rev. E

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