CDC318

1-LINE TO 18-LINE CLOCK DRIVER

SCAS587B – JANUARY 1997 – REVISED MARCH 1998

10

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

DUT

RL = 1 kΩ

VO = 3.3 V

CL = 10 pF or

CL = 400 pF

GND

tsu(START)

t(BUS)

tr(SDATA)

th(START)

tsu(SDATA)

th(SDATA)

tf

tr

tw(SCLL)

tw(SCLH)

tsu(START)

tPHL

tPLH

0.7 VCC

0.3 VCC

0.7 VCC

0.3 VCC

Stop Condition

tsu(STOP)

Repeat Start

Condition

(see Note A)

Start or

Repeat Start

Condition

SCLOCK

SDATA

Start

Condition

(S)

Bit 7

MSB

Bit 6

Bit 0

LSB

(R/W)

Acknowledge

(A)

Stop

Condition

(P)

4 to 6 Bytes for Complete Device

Programming

TEST CIRCUIT

VOLTAGE WAVEFORMS

tf(SDATA)

BYTE

DESCRIPTION

1

I2C address

2

Command (dummy value, ignored)

3

Byte count (dummy value, ignored)

4

I2C data byte 0

5

I2C data byte 1

6

I2C data byte 2

NOTES: A. The repeat start condition is not supported.

B. All input pulses are supplied by generators having hte following characteristics: PRR

≤ 100 kHz, ZO = 50 Ω, tr ≥ 10 ns, tf ≥ 10 ns.