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參數(shù)資料
| 型號(hào)： | SP690R |
| 英文描述： | 3.0V/3.3V Low Power Microprocessor Supervisory with Battery Switch-Over |
| 中文描述： | 3.0V/3.3V低功耗微處理器監(jiān)控與電池開(kāi)關(guān)過(guò) |
| 文件頁(yè)數(shù)： | 4/16頁(yè) |
| 文件大小： | 631K |
| 代理商： | SP690R |
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SP690A/692ADS/08 SP690A/692A Low Power Microprocessor Supervisory with Battery Switch-Over
Copyright 2000 Sipex Corporation
4
PIN ASSIGNMENTS
Pin 1 —V
— Output Supply Voltage. V
connects to V
CC
when V
is greater than
V
and V
CC
is above the reset thresh-
old. When V
falls below V
and
V
is below the reset threshold, V
OUT
connects to V
BATT
. Connect a 0.1
F
capacitor from V
OUT
to GND.
Pin 2 — V
CC
— +5V Supply Input
Pin3 — GND — Ground reference for all signals
Pin 4 — PFI — Power-Fail Input. This is the
noninverting input to the power-fail com-
parator. When PFI is less than 1.25V,
PFO goes low. Connect PFI to GND or
V
OUT
when not used.
Pin 5 — PFO — Power-Fail Output.
Pin 6 — WDI — Watchdog Input. WDI is a
three level input. If WDI remains high or
low for 1.6sec, the internal watchdog timer
triggers a reset. If WDI is left floating or
connected to a high-impedance tri-state
buffer, the watchdog feature is disabled.
The internal watchdog timer clears when-
ever reset is asserted.
Pin 7 for
SP690A/692A/802 only
— RESET
(Active Low)– Reset Output. RESET Out-
put goes low whenever V
falls below
the reset threshold or whenever WDI
remains high or low longer than 1.6
seconds. RESET remains low for 200ms
after V
crosses the reset threshold
voltage on power-up or after being trig-
gered by WDI.
Pin 7 for
SP805 only
— RESET (Active High)–
Reset Output is the inverse of RESET;
when RESET is asserted, the RESET
output voltage = V
CC
or V
BATT
,
whichever is higher.
Pin 8 — V
BATT
— Backup-Battery Input. When
V
BATT
will be switched to V
if V
BATT
20mV greater than V
CC
. When V
20mV above V
, V
will be
reconnected to V
. The 40mV
hysteresis prevents repeated switching if
V
CC
falls slowly.
Figure 10. Pinout
Figure 11. Internal Block Diagram
V
OUT
V
CC
GND
PFI
V
BATT
RESET (RESET)*
WDI
PFO
1
2
3
4
5
6
7
8
*( ) SP805 only
1.25V
0.8V
3.5V
1.25V
BATTERY-SWITCHOVER
CIRCUITRY
PFI
WDI
V
CC
V
BATT
RESET
GENERATOR
V
OUT
RESET
(RESET)*
PFO
WATCHDOG
TIMER
*( ) SP805 only
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP690RCN | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:3.0V/3.3V Low Power Microprocessor Supervisory with Battery Switch-Over |
| SP690RCN-L | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
| SP690RCP | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:3.0V/3.3V Low Power Microprocessor Supervisory with Battery Switch-Over |
| SP690RCP-L | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
| SP690REN | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:3.0V/3.3V Low Power Microprocessor Supervisory with Battery Switch-Over |
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