参数资料
| 型号： | X45620V20I-2.7 |
| 厂商： | Intersil |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC VOLT MON DUAL SW EEPR 20TSSOP |
| 标准包装： | 75 |
| 类型： | 多压监控器 |
| 监视电压数目： | 2 |
| 输出： | 开路漏极或开路集电极 |
| 复位： | 低有效 |
| 复位超时： | 最小为 75 ms |
| 电压 - 阀值： | 1.75V，2.62V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-TSSOP |
| 包装： | 管件 |
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X45620
Data Sheet
July 29, 2005
FN8250.0
Dual Voltage Monitor with Integrated
System Battery Switch and EEPROM
FEATURES
?
?
?
?
2.7V to 5.5V power supply operation
Available package — 20-lead TSSOP
Dual supervisor
Battery switch and output
? Dual voltage monitoring
? Active low reset outputs
? Two standard reset threshold voltages
—Factory programmable threshold
? Lowline Output — zero delayed POR
? Reset signal valid to V CC = 1V
? System battery switch-over circuitry
? Selectable watchdog timer
—(0.15s, 0.4s, 0.8s, off)
? 256Kbits of EEPROM
? Built-in inadvertent write protection
—Power-up/power-down protection circuitry
—Protect 0, 1/4, 1/2 or all of EEPROM array with
programmable Block Lock ? protection
—In circuit programmable ROM mode
? Minimize EEPROM programming time
—64 byte page write mode
—Self-timed write cycle
—5ms write cycle time (typical)
? 400kHz 2-wire Interface
BLOCK DIAGRAM
DESCRIPTION
The Intersil X45620 combines power-on reset control,
battery switch circuit, watchdog timer, supply voltage
supervision, secondary voltage supervision, block lock
protect and serial EEPROM in one package. This
combination lowers system cost, reduces board space
requirements, and increases reliability.
Applying power to the device activates the power-on
reset circuit which holds RESET active for a period of
time. This allows the power supply and oscillator to
stabilize before the processor can execute code.
A system battery switch circuit compares V CC (V1MON)
with V BATT input and connects V OUT to whichever is
higher. This provides voltage to external SRAM or other
circuits in the event of main power failure. The X45620
can drive 50mA from V CC and 250μA from V BATT . The
device switches to V BATT when V CC drops below the
low V CC voltage threshold and V BATT > V CC .
V2MON
V2 Monitor
Logic
+
V TRIP2
-
V OUT
V2FAIL
WDO
WP
Watchdog Transition
Detector
Data
Protect Logic
Watchdog
Timer Reset
SDA
Register
Status
Register
SCL
Command
Decode, Test
& Control
Logic
EEPROM
Array
512 X 512
Reset &
Watchdog
Timebase
BATT-ON
(32K X 8 Bit)
S0
S1
Device
Select
Logic
RESET/MR
V CC
(V1MON)
V CC Monitor
V OUT
+
V TRIP1
-
Power-on,
Low Voltage
Reset
Generation
LOWLINE
System
Logic
V OUT
V BATT
Battery
Switch
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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