Rev B 11/16/15

2

PCI EXPRESSTM CLOCK GENERATOR

841S01 DATA SHEET

Table 1. Pin Descriptions

NOTE: Pullup refers to internal input resistors. See Table 2, Pin Characteristics, for typical values.

Table 2. Pin Characteristics

Number

Name

Type

Description

1, 6, 8, 10

VSS

Power

Ground for core and SRC outputs.

2, 5, 11, 16

VDD

Power

Power supply for core and SRC outputs.

3, 4

SRCT0, SRCC0

Output

Differential output pair. HCSL interface levels.

7

IREF

Input

An external fixed precision resistor (475

) from this pin to ground provides a

reference current used for differential current-mode SRCCx, SRCTx clock

outputs.

9VDDA

Power

Analog supply pin.

12,

13

XTAL_IN,

XTAL_OUT

Input

Crystal oscillator interface. XTAL_IN is the input. XTAL_OUT is the output.

14

SCLK

Input

Pullup

I2C SMBus compatible SCLK. This pin has an internal pullup resistor, but is in

high-impedance in power-down mode. LVCMOS/LVTTL interface levels.

15

SDATA

I/O

Pullup

I2C SMBus compatible SDATA. This pin has an internal pullup resistor, but is

in high-impedance in power-down mode. LVCMOS/LVTTL interface levels.

Symbol

Parameter

Test Conditions

Minimum

Typical

Maximum

Units

CIN

Input Capacitance

4pF

RPULLUP

Input Pullup Resistor

51

k

