SP236BES View Datasheet(PDF) - Signal Processing Technologies

Part Name

Description

Manufacturer

SP236BES

+5V Powered Multi-Channel RS-232 Drivers/Receivers

Signal Processing Technologies 

10

9

8

7

6

5

VOH vs IOH

4

VOL vs IOL

3

2

1

0

0 2 4 6 8 10 12 14 16 18 20 22

IOL/IOH (mA)

Figure 4. Mouse Application Drive Capability

T IN

Figure 5. Parallel Drivers

T OUT

Wake-Up Feature

The SP235B, SP236B, SP240B and SP241B

have a wake-up feature that keeps all receivers

in an enabled state when the device is in the

shutdown mode. Table 2 defines the truth table

for the wake-up function. Timing for the wake-up

function is shown in Figure 6.

If the SP235B, SP236B, SP240B and SP241B

are powered up in the shutdown state (SD driven

high during VCC power up), the part must remain

in a powered on state for a minimum of 3ms

before the wake-up function can be used. After

the 3ms wait time, there is a 2ms delay time

before data is valid for both enable and disable

POWER-UP WITH SD HIGH (charge pump section in shutdown state)

t0 (power up)

+5V

ROUT

0V

DATA

VALID

+5V

SD

tWAIT

0V

POWER-UP WITH SD LOW (charge pump section in active mode)

t0 (power up)

+5V

ROUT

0V

+5V

SD

DATA

VALID

tENABLE

0V

EXERCISING WAKE–UP FEATURE

t0 (power up)

+5V

ROUT

0V

+5V

SD

DATA

VALID

tENABLE

tWAIT

0V

DATA

VALID

tENABLE

DATA

VALID

tENABLE

SPECIFICATIONS:

(VCC =+5V±10%, TA=25°C)

PARAMETER MIN. TYP.

tWAIT

tENABLE

2ms

1ms

MAX.

3ms

2ms

Figure 6. Wake–Up and Shutdown Timing

Date: 8/3/04

+ 5V Powered Multi-Channel RS-232 Drivers/Receivers

9

© Copyright 2004 Sipex Corporation

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