SP691A datasheet(4/7 Pages) SIPEX

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SP691AEB/03

SP691A/693A Evaluation Board Manual

Pin #

Pin Name

Pin Function

Active Level

Input Pin Points

BATT

Backup-Battery Input

OUT

Output Supply Voltage

Input Supply Voltage

GND

Ground for all Signals

BATT ON

Battery On Output

HIGH

LOWLINE

Lowline Output

LOW

OSC IN

Oscillator Input

OUT & GND

OSC SEL

Oscillator Select

OUT & GND

PFI

Power-Fail Input

HIGH

R1 & R2

PFO

Power-Fail Output

LOW

WDI

Watchdog Input

Transitions

OUT & GND

CE OUT

Chip-Enable Output

LOW

CE IN

Chip-Enable Input

LOW

OUT & GND

WDO

Watchdog Output

LOW

RESET

RESET Output

LOW

RESET

RESET Output

HIGH

SP691A/693A Pin Assignments

Power Supply Connections

Pin 3 – V

CC – connect to external +5 VDC supply.

Pin 1 – V

BATT – connect to external V+ supply of 2.8 to 4.0 VDC, or install capacitor CBATT

and charging diode D1 (see List of Materials).

Pin 4 – GND – connect to negative or ground of +5VDC supply and ground of V+ supply for V

BATT

Note: Ensure V

CC, VBATT and GND connections are made before operating device.

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