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CAT1321UI-25TSSOP 数据表(PDF) 1 Page - Catalyst Semiconductor |
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CAT1321UI-25TSSOP 数据表(HTML) 1 Page - Catalyst Semiconductor |
1 / 18 page 1 CAT1320, CAT1321 Supervisory Circuits with I2C Serial 32K CMOS EEPROM © 2005 by Catalyst Semiconductor, Inc. Characteristics subject to change without notice Doc. No. 20585, Rev. 00 ALO GEN FR TM LEAD FREE FEATURES I Precision power supply voltage monitor — 5V, 3.3V and 3V systems - +5.0V (+/- 5%, +/- 10%) - +3.3V (+/- 5%, +/- 10%) - +3.0V (+/- 10%) I Active low reset, CAT1320 I Active high reset, CAT1321 I Valid reset guaranteed at V CC=1V I 400kHz I2C bus I 3.0V to 5.5V operation I Low power CMOS technology I 64-Byte page write buffer I 1,000,000 Program/Erase cycles I 100 year data retention I 8-pin DIP, SOIC, TSSOP and TDFN packages I Industrial temperature range PIN CONFIGURATION DESCRIPTION The CAT1320 and CAT1321 are complete memory and supervisory solutions for microcontroller-based systems. A 32kbit 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 I2C bus. The CAT1320 provides a precision VCC sense circuit and drives an open drain output, RESET low whenever VCC falls below the reset threshold voltage. The CAT1321 provides a precision VCC sense circuit that drives an open drain output, RESET high whenever VCC falls below the reset threshold voltage. 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 options, interface to microcontrollers and other ICs is simple. In addition, the RESET (CAT1320) pin can be used as an input for push-button manual reset capability. The CAT1320/21 memory features a 64-byte page. In addition, hardware data protection is provided by a VCC sense circuit that prevents writes to memory whenever VCC falls below the reset threshold or until VCC reaches the reset threshold during power up. Available packages include an 8-pin DIP, SOIC, TSSOP and 4.9 x 3mm TDFN. PDIP (P, L) SOIC (J, W) TDFN PACKAGE: 4.9MM X 3MM (RD2, ZD2) TSSOP (U, Y) A0 VCC RESET SCL SDA A1 A2 VSS CAT1320 1 2 3 4 8 7 6 5 VCC RESET SCL SDA CAT1321 1 2 3 4 8 7 6 5 A0 A1 A2 VSS A0 VCC RESET SCL SDA A1 A2 VSS CAT1320 1 2 3 4 8 7 6 5 CAT1321 1 2 3 4 8 7 6 5 VCC RESET SCL SDA A0 A1 A2 VSS 1 2 3 4 8 7 6 5 VCC RESET SCL SDA CAT1320 A0 A1 A2 VSS VCC RESET SCL SDA CAT1321 A0 A1 A2 VSS 1 2 3 4 8 7 6 5 |
类似零件编号 - CAT1321UI-25TSSOP |
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类似说明 - CAT1321UI-25TSSOP |
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