MPC9993 REVISION 3 JANUARY 23, 2013

2

©2013 Integrated Device Technology, Inc.

MPC9993 Data Sheet

INTELLIGENT DYNAMIC CLOCK SWITCH (IDCS) PLL CLOCK DRIVER

Figure 2. 32-Lead Pinout (Top View)

Table 1. Pin Descriptions

Pin Name

I/O

Pin Definition

CLK0, CLK0

CLK1, CLK1

LVPECL Input

LVPECL Input

Differential PLL clock reference (CLK0 pulldown, CLK0 pullup)

Differential PLL clock reference (CLK1 pulldown, CLK1 pullup)

Ext_FB, Ext_FB

LVPECL Input

Differential PLL feedback clock (Ext_FB pulldown, Ext_FB pullup)

Qa0:1, Qa0:1

LVPECL Output

Differential 1x output pairs

Qb0:2, Qb0:2

LVPECL Output

Differential 2x output pairs

Inp0bad

LVCMOS Output Indicates detection of a bad input reference clock 0 with respect to the feedback signal. The output is

active HIGH and will remain HIGH until the alarm reset is asserted

Inp1bad

LVCMOS Output Indicates detection of a bad input reference clock 1 with respect to the feedback signal. The output is

active HIGH and will remain HIGH until the alarm reset is asserted

Clk_Selected

LVCMOS Output ‘0' if clock 0 is selected, ‘1' if clock 1 is selected

Alarm_Reset

LVCMOS Input

‘0' will reset the input bad flags and align Clk_Selected with Sel_Clk. The input is “one-shotted”

(50 k

 pullup)

Sel_Clk

LVCMOS Input

‘0' selects CLK0, ‘1' selects CLK1 (50 k

 pulldown)

Manual_Override

LVCMOS Input

‘1' disables internal clock switch circuitry (50 k

 pulldown)

PLL_En

LVCMOS Input

‘0' bypasses selected input reference around the phase-locked loop (50 k

 pullup)

MR

LVCMOS Input

‘0' resets the internal dividers forcing Q outputs LOW. Asynchronous to the clock (50 k

 pullup)

VCCA

Power Supply

PLL power supply

VCC

Power Supply

Digital power supply

GNDA

Power Supply

PLL ground

GND

Power Supply

Digital ground

Qa1

Qa1

Qa0

Qa0

VCC

VCC_PLL

Man_Override

VCC

Inp0bad

Inp1bad

Clk_Selected

GND

Ext_FB

25

26

27

28

29

30

31

32

15

14

13

12

11

10

9

12

3

4

5

6

78

24

23

22

21

20

19

18

17

16

MPC9993

PLL_EN

Ext_FB

GND