1027LE-25TE13 datasheet, PDF - EEWORLD Datasheet

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1027LE-25TE13: DescriptionPower Supply Management Circuit, Adjustable, 2 Channel, CMOS, PDIP8, PLASTIC, DIP-8; CategoryPower/power management The power supply circuit; File Size109KB，17 Pages; ManufacturerCatalyst; Websitehttp://www.catalyst-semiconductor.com/; Environmental Compliance

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1027LE-25TE13 Overview

Power Supply Management Circuit, Adjustable, 2 Channel, CMOS, PDIP8, PLASTIC, DIP-8

1027LE-25TE13 Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Parts packaging code	DIP
package instruction	DIP,
Contacts	8
Reach Compliance Code	unknow
ECCN code	EAR99
Adjustable threshold	YES
Analog Integrated Circuits - Other Types	POWER SUPPLY MANAGEMENT CIRCUIT
JESD-30 code	R-PDIP-T8
JESD-609 code	e3
length	13.87 mm
Number of channels	2
Number of functions	1
Number of terminals	8
Maximum operating temperature	125 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	DIP
Package shape	RECTANGULAR
Package form	IN-LINE
Peak Reflow Temperature (Celsius)	260
Certification status	Not Qualified
Maximum seat height	4.57 mm
Maximum supply voltage (Vsup)	5.5 V
Minimum supply voltage (Vsup)	2.7 V
Nominal supply voltage (Vsup)	3 V
surface mount	NO
technology	CMOS
Temperature level	AUTOMOTIVE
Terminal surface	MATTE TIN
Terminal form	THROUGH-HOLE
Terminal pitch	2.54 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	40
width	7.62 mm
Base Number Matches	1

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Preliminary Information

CAT1026, CAT1027

Dual Voltage Supervisory Circuits with I

C Serial 2K CMOS EEPROM

FEATURES

Precision V

power supply voltage monitor

16-Byte page write buffer

Built-in inadvertent write protection

1,000,000 Program/Erase cycles

Manual reset capability

100 year data retention

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

— 5V, 3.3V and 3V systems

— Five threshold voltage options

Additional voltage monitoring

— Externally adjustable down to 1.25V

Watchdog timer (CAT1027 only)

Active high or low reset

— Valid reset guaranteed to V

=1V

400kHz I

C bus

2.7V to 5.5V operation

Low power CMOS technology

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

packages

— TDFN max height is 0.8mm

Automotive, extended automotive and

industrial temperature ranges

DESCRIPTION

The CAT1026 and CAT1027 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 CAT1026 and CAT1027 provide a precision V

sense circuit with five reset threshold voltage options

that support 5V, 3.3V and 3V systems. The power

supply monitor and reset circuit protects memory and

systems controllers during power up/down and against

brownout conditions. If power supply voltages are out of

tolerance reset signals become active preventing the

system microcontroller, ASIC, or peripherals from

operating.

The CAT1026 features two open drain reset outputs:

one (RESET) drives high and the other (RESET) drives

low whenever V

falls below the threshold. Reset

outputs become inactive typically 200 ms after the

supply voltage exceeds the reset threshold value. With

both active high and low reset signals, interface to

microcontrollers and other ICs is simple. CAT1027 has

only a

RESET

output. In addition, the

RESET

pin can be

used as an input for push-button manual reset capability.

The CAT1026 and CAT1027 provide an auxiliary voltage

sensor input, V

SENSE

, which is used to monitor a second

system supply. The auxiliary high impedance comparator

drives the open drain output, V

LOW

, whenever the sense

voltage is below 1.25V threshold.

The CAT1027 is designed with 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. The CAT1027

features a watchdog timer interrupt input, WDI.

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 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. 3010, Rev. E

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