ICL3221CA View Datasheet(PDF) - Intersil

Part Name

Description

View to exact match

ICL3221CA

One Microamp Supply-Current, +3V to +5.5V, 250kbps, RS-232 Transmitters/Receivers

Intersil 

ICL3221, ICL3222, ICL3223, ICL3232, ICL3241, ICL3243

Pinouts (Continued)

ICL3243 (SOIC, SSOP, TSSOP)

TOP VIEW

C2+ 1

C2- 2

V- 3

R1IN 4

R2IN 5

R3IN 6

R4IN 7

R5IN 8

T1OUT 9

T2OUT 10

T3OUT 11

T3IN 12

T2IN 13

T1IN 14

28 C1+

27 V+

26 VCC

25 GND

24 C1-

23 FORCEON

22 FORCEOFF

21 INVALID

20 R2OUTB

19 R1OUT

18 R2OUT

17 R3OUT

16 R4OUT

15 R5OUT

Pin Descriptions

PIN

FUNCTION

VCC

V+

System power supply input (3.0V to 5.5V).

Internally generated positive transmitter supply (+5.5V).

V-

Internally generated negative transmitter supply (-5.5V).

GND Ground connection.

C1+

External capacitor (voltage doubler) is connected to this lead.

C1-

External capacitor (voltage doubler) is connected to this lead.

C2+

External capacitor (voltage inverter) is connected to this lead.

C2-

External capacitor (voltage inverter) is connected to this lead.

TIN

TOUT

RIN

ROUT

ROUTB

INVALID

TTL/CMOS compatible transmitter Inputs.

RS-232 level (nominally ±5.5V) transmitter outputs.

RS-232 compatible receiver inputs.

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.

EN

SHDN

Active low receiver enable control; doesn’t disable ROUTB outputs.

Active low input to shut down transmitters and on-board power supply, to place device in low power mode.

FORCEOFF Active low to shut down transmitters and on-chip power supply. This overrides any automatic circuitry and FORCEON (See Table 2).

FORCEON Active high input to override automatic powerdown circuitry thereby keeping transmitters active. (FORCEOFF must be high).

5

FN4805.21

March 1, 2006

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