TLC542C, TLC542I

8-BIT ANALOG-TO-DIGITAL CONVERTERS

WITH SERIAL CONTROL AND 11 INPUTS

SLAS075C – FEBRUARY 1989 – REVISED JUNE 2001

3

POST OFFICE BOX 655303

operating sequence

MSB

LSB

Don’t Care

Don’t Care

MSB

LSB

tc(1)

(see Note A)

Hi-Z

State

Hi-Z State

Access

Cycle C

Access

Cycle B

Previous Conversion Data A

Conversion Data B

MSB

LSB

MSB

LSB

(see Note B)

B7

B6

B5

B4

B3

B2

B1

B0

A7

A6

A5

A4

A3

A2

A1

A0

B3

B2

B1

B0

C3

C2

C1

C0

1

234

5

6

7

8

1

234

5

6

7

8

I/O

CLOCK

ADDRESS

INPUT

DATA

OUT

CS

EOC

12 Internal System Clocks

tsu(CS)

tsu(A)

tacq

t(acq)

td(I/O–EOC)

td(EOC–DATA)

tc(2)

See Note B

Don’t Care

NOTES: A. To minimize errors caused by noise at the chip select input, the internal circuitry waits for two rising edges and one falling edge

of the internal system clock after CS

↓ before responding to control input signals. The CS setup time is given by the tsu(CS)

specifications. Therefore, no attempt should be made to clock-in an address until the minimum chip select setup time has elapsed.

B. The output becomes 3-state on CS going high or on the negative edge of the eighth I/O clock.

6.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage range (any input)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

±20 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

±30 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range: TLC542C

0

°C to 70°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TLC542l

– 40

°C to 85°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

– 65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

260

°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: DW or N package

260

°C

. . . . . . . . . . . . . .

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTE 1: All voltage values are with respect to digital ground with REF– and GND wired together (unless otherwise noted).