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參數資料
| 型號： | CAT1026 |
| 英文描述： | Dual Voltage Supervisory Circuit with I2C Serial 2K CMOS EEPROM. Reset Active High & Low. Auxiliary Voltage Monitor |
| 中文描述： | 雙電壓監控電路與I2C串行2K的CMOS EEPROM中。復位高有效 |
| 文件頁數： | 1/17頁 |
| 文件大?。?/td> | 114K |
| 代理商： | CAT1026 |
DESCRIPTION
The CAT1026 and CAT1027 are complete memory and
supervisory solutions for microcontroller-based systems.
A 2k-bit 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
2
C bus.
The CAT1026 and CAT1027 provide a precision V
CC
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
CC
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
CAT1026, CAT1027
Dual Voltage Supervisory Circuits with I
2
C Serial 2k-bit CMOS EEPROM
FEATURES
I
Precision V
CC
power supply voltage monitor
— 5V, 3.3 V and 3 V systems
— Five threshold voltage options
I
Additional voltage monitoring
— Externally adjustable down to 1.25 V
I
Watchdog timer (CAT1027 only)
I
Active high or low reset
— Valid reset guaranteed to V
CC
= 1 V
I
400 kHz I
2
C bus
I
2.7 V to 5.5 V operation
I
Low power CMOS technology
I
16-Byte page write buffer
I
Built-in inadvertent write protection
I
1,000,000 Program/Erase cycles
I
Manual reset capability
I
100 year data retention
I
8-pin DIP, SOIC, TSSOP, MSOP or TDFN
(3 x 4.9 mm & 3 x 3 mm foot-print) packages
— TDFN max height is 0.8mm
I
Industrial and extended temperature ranges
2003 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Doc No. 3010, Rev. G
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.
The on-chip 2k-bit EEPROM memory features a 16-byte
page. In addition, hardware data protection is provided by a
V
CC
sense circuit that prevents writes to memory whenever
V
CC
falls below the reset threshold or until V
CC
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).
Preliminary Information
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相關PDF資料 |
PDF描述 |
|---|---|
| CAT1022 | Supervisory Circuit with I2C Serial 2K CMOS EEPROM. Manual Reset and Watchdog Timer Monitors SDA |
| CAT1023 | Supervisory Circuit with I2C Serial 2K CMOS EEPROM. Manual Reset and Watchdog Timer Monitors WDI pin. Active High & Low Reset |
| CAT1024 | Supervisory Circuit with I2C Serial 2K CMOS EEPROM. Manual Reset |
| CAT1025 | Supervisory Circuit with I2C Serial 2K CMOS EEPROM. Manual Reset. WP Pin. Active High & Low Reset |
| CAT1027 | Dual Voltage Supervisory Circuit with I2C Serial 2K CMOS EEPROM. Auxiliary Voltage Monitor. Watchdog Monitors WDI Pin |
相關代理商/技術參數 |
參數描述 |
|---|---|
| CAT1026LI25 | 功能描述:監控電路 2K bit 2.5V Ind Temp RoHS:否 制造商:STMicroelectronics 監測電壓數: 監測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| CAT1026LI-25-G | 功能描述:監控電路 CPU w/2K RoHS:否 制造商:STMicroelectronics 監測電壓數: 監測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| CAT1026LI28 | 功能描述:監控電路 2K bit 2.8V Ind Temp RoHS:否 制造商:STMicroelectronics 監測電壓數: 監測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| CAT1026LI-28-G | 功能描述:監控電路 CPU w/2K RoHS:否 制造商:STMicroelectronics 監測電壓數: 監測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| CAT1026LI30 | 功能描述:監控電路 2K bit 3V Ind Temp RoHS:否 制造商:STMicroelectronics 監測電壓數: 監測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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