ISL4238E Intersil Corporation, ISL4238E Datasheet - Page 3

• Manufacturer Part Number: ISL4238E
• Description: QFN Packaged, 15kV Esd Protected, +2.7V to +5.5V, 10Nanoamp, 250kbps/ 1Mbps, RS-232 Transceivers With Enhanced Automatic Powerdown
• Manufacturer: Intersil Corporation

Pin Descriptions
NOTE:
FORCEOFF Active low to shut down transmitters and on-chip power supply. This overrides any automatic circuitry and FORCEON (see Table 2).
1. ISL4238E input pins incorporate positive feedback resistors. Once the input is driven to a valid logic level, the feedback resistor maintains that
FORCEON
INVALID
R
R
T
logic level until V
GND
V
C1+
C2+
OUTB
PIN
C1-
C2-
R
T
OUT
V+
OUT
V-
CC
IN
IN
System power supply input (2.7V to 5.5V).
Ground connection.
External capacitor (voltage doubler) is connected to this lead.
External capacitor (voltage doubler) is connected to this lead.
External capacitor (voltage inverter) is connected to this lead.
External capacitor (voltage inverter) is connected to this lead.
TTL/CMOS compatible transmitter Inputs. (Note 1)
±15kV ESD Protected
±15kV ESD Protected
TTL/CMOS level receiver outputs.
TTL/CMOS level, noninverting, always enabled receiver outputs.
Active low output that indicates if no valid RS-232 levels are present on any receiver input.
Active high input to override automatic powerdown circuitry thereby keeping transmitters active. (FORCEOFF must be high).
Internally generated positive transmitter supply (+5.5V).
Internally generated negative transmitter supply (-5.5V).
CC
is removed. Unused transmitter inputs may be left unconnected by the user.
3
,
,
RS-232 level (nominally ±5.5V) transmitter outputs.
RS-232 compatible receiver inputs.
ISL4238E, ISL4244E, ISL4245E
FUNCTION