PI6C20400_08 Datasheet, PDF (1/10 Pages) Pericom Semiconductor Corporation – 1:4 Clock Driver for Intel PCI Express Chipsets

Features
• Four Pairs of Differential Clocks
• Low skew < 50ps
• Low jitter < 50ps
• Output Enable for all outputs
• Outputs tristate control via SMBus
• Power Management Control
• Programmable PLL Bandwidth
• PLL or Fanout operation
• 3.3V Operation
• Packaging (Pb-free and Green):
— 28-Pin SSOP (H28) & 28-Pin TSSOP (L28)
PI6C20400
1:4 Clock Driver for Intel
PCI Express Chipsets
Description
Pericom Semiconductor's PI6C20400 is a high-speed, low-noise
differential clock buffer designed to be companion to PI6C410B.
The device distributes the differential SRC clock from PI6C410B
to four differential pairs of clock outputs either with or without
PLL. The clock outputs are controlled by input selection of
SRC_STOP#, PWRDWN# and SMBus, SCLK and SDA. When
input of either SRC_STOP# or PWRDWN# is low, the output
clocks are Tristated. When PWRDWN# is low, the SDA and
SCLK inputs must be Tri-stated.
Block Diagram
OE_INV
OE_0 & OE_3
SRC_STOP#
PWRDWN#
Output
Control
SCLK
SDA
PLL/BYPASS#
SRC
SRC#
SMBus
Controller
DIV
PLL_BW#
PLL
Pin Configuration
OUT0
OUT0#
OUT0
OUT1#
OUT2
OUT2#
OUT3
OUT3#
VDD 1
SRC 2
SCR# 3
V_SS 4
VDD 5
OUT0 6
OUT0# 7
OE_0 8
OUT1 9
OUT1# 10
V_DD 11
PLL/BYPASS# 12
SCLK 13
SDA 14
28 V_{DD_A}
27 V_{SS_A}
26 I_REF
25 OE_INV
24 V_DD
23 OUT3
22 OUT3#
21 OE_3
20 OUT2
19 OUT2#
18 V_DD
17 PLL_BW#
16 SRC_STOP#
15 PWRDWN#
08-0298
1
PS8744C
11/13/08