DS1232LP datasheet(7/7 Pages) DALLAS

7 / 7 page

DS1232LP/LPS

062698 7/7

AC ELECTRICAL CHARACTERISTICS

°C to 70°C; VCC = 5V + 10%)

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

NOTES

PBRST = VIL

tPB

RESET Active Time

tRST

250

610

1000

ST Pulse Width

tST

6, 9

VCC Fail Detect to RST and RST

tRPD

175

µs

VCC Slew Rate 4.75V to 4.25V

300

µs

VCC Detect to RST and RST

Inactive

tRPU

250

610

1000

VCC Slew Rate 4.25V to 4.75V

PBRST Stable Low to RST and

RST

tPDLY

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 VCC with an internal impedance of 40K 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. 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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