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| 型号： | SP690ACN-L |
| 厂商： | Exar Corporation |
| 文件页数： | 11/16页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISOR MPU LP 8NSOIC |
| 产品变化通告： | SP690A,S,T |
| 标准包装： | 98 |
| 类型： | 简单复位/加电复位 |
| 监视电压数目： | 1 |
| 复位： | 低有效 |
| 复位超时： | 最小为 140 ms |
| 电压 - 阀值： | 4.65V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOICN |
| 包装： | 管件 |
| 其它名称： | 1016-1529-5 SP690ACN-L-ND |
S I G N A L
V C C
S T A T U S
D i s c o n n e c t e d f r o m V O U T
+5V
V O U T
C o n n e c t e d t o V B A T T t h r o u g h
a n i n t e r n a l 8 ? P M O S s w i t c h
C o n n e c t e d t o V O U T . C u r r e n t
V BATT
V CC
V OUT
CONNECT TO
STATIC RAM
V B A T T
d r a w n f r o m t h e b a t t e r y i s
l e s s t h a n 0 . 6 μ A , a s l o n g a s
0.1F
RESET
(RESET)*
CONNECT
TO μ P
P F I
V C C < V B A T T - 1 V .
P o w e r - f a i l c o m p a r a t o r i s
d i s a b l e d .
GND
*( ) SP805L only
P F O
R E S E T
R E S E T
W D I
L o g i c l o w
L o g i c l o w
L o g i c h i g h ( S P 8 0 5 o n l y )
W a t c h d o g t i m e r i s d i s a b l e d
Figure 16. Backup Power Source Using High Capacity
Capacitor with SP690A/802L/805L and a +5V ± 5% Supply
If V CC is above the reset threshold and V BATT
is 0.5V above V CC , current flows to VOUT and
V CC from V BATT until the voltage at V BATT is
Figure 14. Input and Output Status in Battery-Backup Mode.
To enter the Battery-Backup mode, V CC must be less than the
Reset threshold and less than V BATT .
Using a High Capacity Capacitor
as a Backup Power Source
V BATT has the same operating voltage range as
V CC , and the battery-switchover threshold volt-
ages are typically +20mV centered at V BATT ,
allowing use of a capacitor and a simple charging
circuit as a backup source (see Figure 16) .
less than 0.5V above V CC .
Leakage current through the capacitor charging
diode and the SP690A/SP802L/SP805L internal
power diode eventually discharges the capacitor
to V CC . Also, if V CC and V BATT start from 0.5V
above the reset threshold and power is lost at
V CC , the capacitor on V BATT discharges through
V CC until V BATT reaches the reset threshold; the
SP690A/SP802L/SP805L then switches to
battery-backup mode.
PART
N U M B E R
M A X I M U M
B A C K U P - B A T T E R Y
V O L T A G E [ V ]
+5V
V CC
S P 6 9 0 A
S P 8 0 2 L
S P 8 0 5 L
4 . 8 0
0.1F
V BATT
V OUT
RESET
CONNECT TO
STATIC RAM
CONNECT
S P 6 9 2 A
S P 8 0 2 M
4 . 5 5
100K ?
GND
(RESET)* TO μ P
*( ) SP805M only
S P 8 0 5 M
Figure 15. Allowable BACKUP-BATTERY Voltages
Figure 17. Backup Power Source Using High Capacity
Capacitor with SP692A/802M/805M and a +5V ± 10% Supply
Date: 11/29/04
SP690A/692A Low Power Microprocessor Supervisory with Battery Switch-Over
11
? Copyright 2004 Sipex Corporation
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相关代理商/技术参数 |
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|---|---|
| SP690ACN-L/TR | 功能描述:监控电路 LW PWR MICRO 4.65V TEMP 0C to 70C RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| SP690ACP | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Low Power Microprocessor Supervisory with Battery Switch-Over |
| SP690ACP-L | 功能描述:监控电路 LW PWR MICRO 4.65V TEMP 0C to 70C RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| SP690AEN | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Low Power Microprocessor Supervisory with Battery Switch-Over |
| SP690AEN/TR | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Low Power Microprocessor Supervisory with Battery Switch-Over |
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