HIN232, HIN236, HIN237, HIN238, HIN239, HIN240, HIN241
Pin Descriptions
PIN
FUNCTION
V
Power Supply Input 5V ±10%.
CC
V+
V-
Internally generated positive supply (+10V nominal), HIN239 requires +7.5V to +13.2V.
Internally generated negative supply (-10V nominal).
GND
C1+
C1-
C2+
C2-
Ground lead. Connect to 0V.
External capacitor (+ terminal) is connected to this lead.
External capacitor (- terminal) is connected to this lead.
External capacitor (+ terminal) is connected to this lead.
External capacitor (- terminal) is connected to this lead.
T
Transmitter Inputs. These leads accept TTL/CMOS levels. An internal 400kΩ pull-up resistor to VCC is connected to each lead.
Transmitter Outputs. These are RS-232 levels (nominally ±10V).
Receiver Inputs. These inputs accept RS-232 input levels. An internal 5kΩ pull-down resistor to GND is connected to each input.
Receiver Outputs. These are TTL/CMOS levels.
IN
T
OUT
R
IN
R
OUT
EN
SD
NC
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.
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.
No Connect. No connections are made to these leads.
2
ISSI [ INTEGRATED SILICON SOLUTION, INC ]
