DS1232 查看數據表（PDF） - Dallas Semiconductor -> Maxim Integrated

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DS1232

MicroMonitor Chip

Dallas Semiconductor -> Maxim Integrated 

AC ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

PBRST = VIL

tPB

RESET Active Time

tRST

ST Pulse Width

tST

VCC Fail Detect to RST and RST

tRPD

VCC Slew Rate 4.75V to 4.25V

tF

VCC Detect to RST and RST Transition

tRPU

VCC Slew Rate 4.25V to 4.75V

tR

PBRST Stable Low to RST and RST

tPDLY

MIN

20

250

20

300

250

0

DS1232/DS1232S

(0°C to 70°C; VCC=5V ± 10%)

TYP MAX UNITS NOTES

ms

610 1000

ms

ns

6, 8

100 175

µs

µs

610 1000

ms

4

5

µs

20

ms

NOTES:

1. All voltages referenced to ground.

2. Measured with outputs open.

3. PBRST is internally pulled up to VCC with an internal impedance of 10k typical.

4. tR = 5 µs.

5. RST is an open-drain output.

6. Must not exceed tTD minimum. See Table 1.

7. RST remains within 0.5V of VCC on power-down until VCC drops below 2.0V. RST remains within

0.5V of GND on power-down until VCC drops below 2.0V.

8. Watchdog can not be disabled. It must be strobed to avoid resets.

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