DS1232LPU Datasheet, PDF (7/7 Pages) Dallas Semiconductor – Low Power MicroMonitor Chip

AC ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
PBRST = V_IL
t_PB
RESET Active Time
t_RST
ST Pulse Width
t_ST
V_CC Fail Detect to RST and RST
t_RPD
V_CC Slew Rate 4.75V to 4.25V
t_F
V_CC Detect to RST and RST Inactive
t_RPU
V_CC Slew Rate 4.25V to 4.75V
t_R
PBRST Stable Low to RST and RST
t_PDLY
MIN
20
250
20
300
250
0
DS1232LP/LPS
(0°C to 70°C; V_CC=5V ± 10%)
TYP MAX UNITS NOTES
ms
610 1000
ms
ns
6, 9
50
175
µs
µs
610 1000
ms
4
ns
20
ms
NOTES:
1. All voltages referenced to ground.
2. Measured with outputs open and ST and PBRST within 0.5V of supply rails.
3. PBRST is internally pulled up to V_CC with an internal impedance of 40k typical.
4. t_R = 5 µs.
5. RST is an open-drain output.
6. Must not exceed t_TD minimum. See Table 1.
7. RST remains within 0.5V of V_CC on power-down until V_CC drops below 2.0V. RST remains within
0.5V of GND on power-down until V_CC drops below 2.0V.
8. Measured with outputs open and ST and PBRST at TTL levels.
9. Watchdog can not be disabled. It must be strobed to avoid resets.
MARKING INFORMATION:
8-pin DIP - “DS1232L”
16-pin SOIC - “DS1232L”
8-pin SOIC - “DS1232L”
8-pin µ-SOP - “1232”
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