DS1632 Datasheet, PDF (1/6 Pages) Dallas Semiconductor – PC Power-Fail and Reset Controller

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DS1632
PC Power-Fail and Reset Controller
FEATURES
· Power-fail detector for personal computers
and workstations
· Connects directly to popular personal
computer chip sets
· On chip 32.768 kHz oscillator for real time
clock
· Provides battery backup power to clock chip
· Pushbutton reset input
· Accurate 5% or 10% +5-volt power supply
monitoring
· Complementary outputs for reset, power-fail,
and low battery
· Provides for reset pulse width of either 95 ms
or 190 ms
· Eliminates the need for discrete components
· Low-power CMOS circuitry
· 16-pin DIP or SOIC surface mount package
· 0°C to 70°C operation
PIN ASSIGNMENT
PBRST
1
X1
2
X2
3
VBAT
4
LB
5
LB
6
TOL
7
GND
8
16
VCC
15
PF
14
PF
13
VCCO
12
RST
11
RST
10
RD
9
OSCOUT
16-Pin DIP (300-mil)
See Mech. Drawings Section
PBRST
1
X1
2
X2
3
VBAT
4
LB
5
LB
6
TOL
7
GND
8
16
VCC
15
PF
14
PF
13
VCCO
12
RST
11
RST
10
RD
9
OSCOUT
16-Pin SOIC (300-mil)
See Mech. Drawings Section
PIN DESCRIPTION
PBRST
- Pushbutton Reset Input
X1, X2
- Crystal Inputs
V_BAT
LB, LB
- Battery Input
- Low Battery Outputs
RST, RST - Reset Outputs
RD
- Reset Duration
TOL
- Selects 5% Or 10% Detection
GND
- Ground
OSCOUT - Oscillator Out
V_CCO
PF, PF
- Switched Power Out
- Power-Fail Outputs
DESCRIPTION
V_CC
- +5-Volt Power In
The DS1632 PC Power-Fail and Reset Controller is designed to do various functions involving battery
backup and other functions typically accomplished with discrete components. The DS1632 provides a
32.768 kHz battery-backed crystal oscillator and switched V_CC/V_BAT power via V_CCO for the real time
clock function located in accompanying chip sets. In addition, the DS1632 provides for reset on both
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