MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

1

REV 1

1/96

Low-Voltage 1:9 Differential

ECL/HSTL to HSTL Clock Driver

The MPC9111 is a low skew 1–to–9 differential HSTL compatible

output fanout buffer. The device is functionally equivalent to the

MC100LVE111 device. The device accepts either LVPECL or HSTL

compatible input levels and provides 9 low skew differential HSTL

compatible outputs. The device operates from a single 3.3V VCC supply.

The MPC911 HSTL outputs are not realized in the conventional

manner. To minimize part–to–part and output–to–output skew the HSTL

compatible output levels are generated with an open emitter architecture.

The outputs are pulled down with 50

Ω to ground rather than the typical

50

Ω to VDDQ pullup of a “standard” HSTL output. Because the HSTL

outputs are pulled to ground the MPC911 does not utilize the VDDQ supply

of the HSTL standard. The output levels are derived from VCC, an internal

regulator minimizes the output level variation with VCC variations.

1

56

7

8

9

10

11

25

24

23

22

21

20

19

26

27

28

2

3

4

18

17

16

15

14

13

12

VEE

CLK_Sel

HSTL_CLK

VCC

HSTL_CLK

PECL_CLK

PECL_CLK

Q3

Q3

Q4

VCCO

Q4

Q5

Q5

Pinout: 28-Lead PLCC (Top View)

Q0

Q0

Q1

VCCO Q1

Q2

Q2

Q8

Q7

Q6

Q8

VCCO Q7

Q6

MPC911

LOW-VOLTAGE

1:9 DIFFERENTIAL ECL/HSTL

TO HSTL CLOCK DRIVER

FN SUFFIX

PLASTIC PACKAGE

CASE 776-02

PIN NAMES

Function

Differential HSTL Input

Differential PECL Input

Differential Outputs

Pins

HSTL_CLK, HSTL_CLK

PECL_CLK, PECL_CLK

Q0–Q8, Q0–Q8