 2002 Microchip Technology Inc.

DS21360B-page 3

TC1142

2.0

PIN DESCRIPTIONS

The descriptions of the pins are listed in Table 2-1.

TABLE 2-1:

PIN FUNCTION TABLE

Pin No.

(8-Pin MSOP)

Symbol

Description

Regulated negative output voltage.

2C2–

Negative terminal of flying capacitor C2.

3C2+

Positive terminal of flying capacitor C2.

4C1–

Negative terminal of flying capacitor C1.

5

GND

Power supply ground.

6C1+

Positive terminal of flying capacitor C1.

Power supply positive voltage input (2.5V to 5.5V).

8

CCLK

Clock control input:

If low, the TC1142 is in Shutdown mode (1

µA, max).

If high, the TC1142 runs off the internal oscillator (200kHz, typ.).

CCLK can be overridden by an external oscillator from 3kHz to 500kHz.