PI6C49003 Datasheet, PDF (1/12 Pages) Pericom Semiconductor Corporation – Networking Clock Generator

PI6C49003
Networking Clock Generator
Features
• 3.3V +/-10% Supply Voltage
• Uses 25MHz xtal such as Saronix-eCera™ SRX7278
• Five PCIe® 100MHz outputs with optional -0.5% spread
spectrum support
• Two LVCMOS 50MHz outputs that support +/- 10%
frequency margining
• One frequency selectable 33/66/133MHz LVCMOS output
• One 32.256MHz LVCMOS output
• Industrial temperature -40°C to 85°C
• Package: 48-pin TSSOP package
Description
The PI6C49003 is a clock generator device intended for PCIe®/
networking applications. The device includes five 100MHz
differential Host Clock Signal Level (HCSL) outputs for PCIe,
two single-ended 50 MHz outputs, one single-ended 32.256MHz
output, and one selectable single-ended 33/66/133 MHz output.
Using a serially programmable SMBUS interface, the PI6C49003
incorporates spread spectrum modulation on the five 100 MHz
HCSL PCIe outputs, and independent frequency margining on the
50MHz output, 33.3333MHz and 66.6666MHz clock outputs.
Pin Configuration
Block Diagram
25 MHz
crystal or
clock input
Clock Buffer/
Crystal
Oscillator
VDD
14
SCLK
SDATA
PD_RESET
PLL, Dividers,
Buffers, and
Logic
5
100M_OUT(0-4)
50M_OUT(1-2)
33/66/133M_OUT1
32.256M_OUT1
10
GND
ISET
475 Ohms
1%
VDD
1
IREF
2
NC
3
NC
4
VDD
5
VDD
6
GND
7
GND
8
VDD
9
GND
10
VDD
11
SCLK
12
SDATA
13
GND
14
50M_Out1
15
50M_Out2
16
VDD
17
GND
18
VDD
19
32.256M_Out1
20
GND
21
NC
22
NC
23
PD_RESET
24
09-0097
1
48
GND
47
VDD
46
100M_Q0-
45
100M_Q0+
44
100M_Q1+
43
100M_Q1-
42
VDD
41
GND
40
VDD
39
100M_Q2+
38
100M_Q2-
37
100M_Q3+
36
100M_Q3-
35
VDD
34
GND
33
VDD
32
100M_Q4+
31
100M_Q4-
30
33/66/133M_Out1
29
VDD
28
GND
27
VDD
26
X2
25
X1
PS9023A
11/20/09