831742I Datasheet, PDF (1/20 Pages) Integrated Device Technology – 4:2 Differential Clock/Data Multiplexer

4:2 Differential Clock/Data
Multiplexer
831742I
Data Sheet
General Description
The 831742I is a high-performance, differential HCSL clock/data
multiplexer and fanout buffer. The device is designed for the
multiplexing and fanout of high-frequency clock and data signals.
The device has four differential, selectable clock/data inputs. The
selected input signal is distributed to two low-skew differential HCSL
outputs. Each input pair accepts HCSL, LVDS and LVPECL levels.
The 831742I is characterized to operate from a 3.3V power supply.
Guaranteed input, output-to-output and part-to-part skew
characteristics make the 831742I ideal for those clock and data
distribution applications demanding well-defined performance and
repeatability. The 831742I supports the clock multiplexing and
distribution of PCI Express (2.5 Gb/s), Gen 2 (5 Gb/s) and
Gen 3 (8 Gb/s) clock signals.
Features
• 4:2 differential clock/data multiplexer with fanout
• Four selectable, differential input pairs
• Each differential input pair can accept the following levels: HCSL,
LVDS and LVPECL
• Two differential HCSL output pairs
• Maximum input/output clock frequency: 700MHz
• Maximum input/output data rate: 1400Mb/s (NRZ)
• LVCMOS interface levels for all control inputs
• PCI Express (2.5Gb/s), Gen 2 (5 Gb/s) and Gen 3 (8 Gb/s) clock
jitter compliant
• Input skew: 110ps max
• Part-to-part skew: 225ps max
• Full 3.3V supply voltage
• Available in lead-free (RoHS 6)
• -40°C to 85°C ambient operating temperature
Block Diagram
IREF
Pulldown
CLK0 ^Pullup/down
nCLK0 ^Pulldown
Pullup/down
Pulldown
CLK1 Pullup/down
nCLK1
Pulldown
Pullup/down
CLK2 _Pulldown
nCLK2 ^Pulldown
CLK3
Pullup
Pullup
nCLK3
00
01
10
11
QA
nQA
Pin Assignment
GND 1
CLK0 2
nCLK0 3
VDD 4
CLK1 5
nCLK1 6
CLK2 7
nCLK2 8
GND 9
CLK3 10
nCLK3 11
V_DD 12
24 SEL1
23 IREF
22 SEL0
21 VDD
20 nQB
19 QB
18 nQA
17 QA
16 VDD
15 GND
14 nOEB
13 nOEA
831742AGI
24-Lead TSSOP
4.4mm x 7.8mm x 0.925mm package body
G Package
Top View
©2016 Integrated Device Technology, Inc
1
April 5, 2016