ICL3221EM_14 Datasheet, PDF (2/12 Pages) Intersil Corporation – ±15kV ESD Protected, +3V, 1μA, 250kbps, RS-232 Transmitters/Receivers

ISL3221EM
Pin Configurations
ICL3221EM
(16 LD TSSOP)
TOP VIEW
EN 1
C1+ 2
V+ 3
C1- 4
C2+ 5
C2- 6
V- 7
R1IN 8
16 FORCEOFF
15 VCC
14 GND
13 T1OUT
12 FORCEON
11 T1IN
10 INVALID
9 R1OUT
Pin Descriptions
PIN
PIN
NUMBER
FUNCTION
EN
1
Active low receiver enable control
C1+
2
External capacitor (voltage doubler) is connected to this lead.
V+
3
Internally generated positive transmitter supply (+5.5V).
C1-
4
External capacitor (voltage doubler) is connected to this lead.
C2+
5
External capacitor (voltage inverter) is connected to this lead.
C2-
6
External capacitor (voltage inverter) is connected to this lead.
V-
7
Internally generated negative transmitter supply (-5.5V).
R1IN
8
±15kV ESD Protected, RS-232 compatible receiver inputs.
R1OUT
9
TTL/CMOS level receiver outputs.
INVALID
10
Active low output that indicates if no valid RS-232 levels are present on any receiver input.
T1IN
11
TTL/CMOS compatible transmitter Inputs.
FORCEON
12
Active high input to override automatic power-down circuitry thereby keeping transmitters active
(FORCEOFF must be high).
T1OUT
13
±15kV ESD Protected, RS-232 level (nominally ±5.5V) transmitter outputs.
GND
14
Ground connection.
VCC
15
System power supply input (3.0V to 3.6V).
FORCEOFF
16
Active low to shut down transmitters and on-chip power supply. This overrides any automatic circuitry
and FORCEON (see Table 2).
2
FN7552.0
December 17, 2009