ISL83387 Просмотр технического описания (PDF) - Renesas Electronics

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производитель

ISL83387

+/-15kV ESD Protected, +3V to +5.5V, 1Microamp, 250kbps, RS-232 Transceivers with Enhanced Automatic Powerdown and a Separate Logic Supply

Renesas Electronics 

ISL83387E

Pinout

ISL83387E (TSSOP)

TOP VIEW

C1+ 1

V+ 2

C1- 3

C2+ 4

C2- 5

V- 6

T1IN 7

T2IN 8

INVALID 9

T3IN 10

FORCEON 11

R3OUT 12

24 FORCEOFF

23 VCC

22 GND

21 T1OUT

20 T2OUT

19 T3OUT

18 R1IN

17 R2IN

16 R3IN

15 VL

14 R1OUT

13 R2OUT

Pin Descriptions

PIN

FUNCTION

VCC

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

V+

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

TTL/CMOS compatible transmitter Inputs. The switching point is a function of the VL voltage.

TOUT

15kV ESD Protected, RS-232 level (nominally 5.5V) transmitter outputs.

RIN

15kV ESD Protected, RS-232 compatible receiver inputs.

ROUT TTL/CMOS level receiver outputs. Swings between GND and VL.

VL

Logic-Level Supply. All TTL/CMOS inputs and outputs are powered by this supply.

INVALID Active low output that indicates if no valid RS-232 levels are present on any receiver input. Swings between GND and VL.

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

The switching point is a function of the VL voltage.

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

switching point is a function of the VL voltage.

FN6040 Rev 1.00

July 8, 2005

Page 2 of 13

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