ICS9EX21801A Datasheet, PDF (1/14 Pages) Integrated Device Technology – 18 Output PCIe G2/QPI Differential Buffer with 2:1 input mux

DATASHEET
18 Output PCIe G2/QPI Differential Buffer with 2:1 input
mux
ICS9EX21801A
Description
The ICS9EX21801 provides 18 output clocks for PCIe Gen2
(100MHz) or QPI (133MHz) applications. The 9EX21801 has 4
selectable SMBus addresses, and dedicated CKPWRGD/PD#
and VDDA pins for easy board design. A differential CPU clock
from a CK410B+ main clock generator, such as the ICS932S421,
drives the ICS9EX21801. In fanout mode, the 9EX21801 provides
outputs up to 400MHz.
Features/Benefits
• Supports output clock frequencies up to 400 MHz
• 4 Selectable SMBus addresses
• SMBus address is independent of PLL operating mode
• Dedicated CKPWRGD/PD# and VDDA pins ease board
design
Key Specifications
• DIF output cycle-to-cycle jitter < 50ps
• DIF output-to-output skew < 150 ps
• PCIe Gen2 compliant phase noise
• QPI 133MHz compliant phase noise
Funtional Block Diagram
OE(17:15)# ₁₂
OE(14:5)#,
OE_01234#
CLKA_IN
CLKA_IN#
CLKB_IN
CLKB_IN#
HIBW_BYPM_LOBW#
100M_133M#
CKPWRGD/PD#
SMB_A0
SMB_A1
SEL_A_B#
SMBDAT
SMBCLK
Logic
PLL
(SS Compatible)
18
DIF(17:0)
IREF
IDT^TM 18 Output PCIe G2/QPI Differential Buffer with 2:1 input mux
1
1463B — 01/20/10