2

FN3138.16

September 26, 2008

Pin Descriptions

PIN

FUNCTION

Power Supply Input 5V ±10%.

V+

Internally generated positive supply (+10V nominal), HIN239 requires +7.5V to +13.2V.

V-

Internally generated negative supply (-10V nominal).

GND

Ground lead. Connect to 0V.

C1+

External capacitor (+ terminal) is connected to this lead.

C1-

External capacitor (- terminal) is connected to this lead.

C2+

External capacitor (+ terminal) is connected to this lead.

C2-

External capacitor (- terminal) is connected to this lead.

Transmitter Inputs. These leads accept TTL/CMOS levels. An internal 400k

Transmitter Outputs. These are RS-232 levels (nominally ±10V).

Receiver Inputs. These inputs accept RS-232 input levels. An internal 5k

Ω pull-down resistor to GND is connected to each input.

Receiver Outputs. These are TTL/CMOS levels.

EN

Enable input. This is an active low input which enables the receiver outputs. With EN = 5V, the receiver outputs are placed

in a high impedance state.

SD

Shutdown Input. With SD = 5V, the charge pump is disabled, the receiver outputs are in a high impedance state and the

transmitters are shut off.

NC

No Connect. No connections are made to these leads.

HIN232, HIN236, HIN237, HIN238, HIN239, HIN240, HIN241