ICS854S1208I Datasheet, PDF (1/19 Pages) Integrated Device Technology – Eight differential LVDS output pairs

Differential-to-LVDS Fanout Buffer w/Divider ICS854S1208I
and Glitchless Switch
DATA SHEET
General Description
The ICS854S1208I is a low skew, 8 output LVDS Fanout Buffer with
selectable divider. The ICS854S1208I has 2 selectable inputs that
accept a variety of differential input types. The device provides the
capability to suppress any glitch at the outputs of the device during
an input clock switch to enhance clock redundancy in fault tolerant
applications.
The divide select inputs, DIV_SELA and DIV_SELB, control the
output frequency of each bank. The output banks can be
independently selected for ÷1 or ÷2 operation. The output enable
pins assigned to each output, support enabling and disabling each
output individually.
The ICS854S1208I is characterized at full 3.3V or 2.5V output
operating supply modes. Guaranteed output and part-to-part skew
characteristics make the ICS854S1208I ideal for high performance
applications.
Features
• Eight differential LVDS output pairs
Each output has individual synchronous output enable
• Two selectable differential CLKx, nCLKx input pairs
• CLKx, nCLKx pairs can accept the following differential
input levels: LVPECL, LVDS, HCSL
• Maximum output frequency: 1.5GHz
• Independent bank control for ÷1 or ÷2 operation
• Glitchless output behavior during input switch
• Output skew: 40ps (maximum)
• Bank skew: 35ps (maximum)
• Full 3.3V or 2.5V supply mode
• -40°C to 85°C ambient operating temperature
• Available in lead-free (RoHS 6) package
Supply Mode Operation Table
3.3V Operation
2.5V Operation
V_DD = 3.3V
V_TAP = Float
V_DD = 2.5V
V_TAP = 2.5V
Pin Assignment
VDD
DIV_SELA
VTAP
CLK0
nCLK0
GND
CLK_SEL
nCLK1
CLK1
GND
DIV_SELB
VDD
48 47 46 45 44 43 42 41 40 39 38 37
1
36
2
35
3
34
4
33
5
32
6
31
7
30
8
29
9
28
10
27
11
26
12
25
13 14 15 16 17 18 19 20 21 22 23 24
VDD
OEB0
OEB1
OEB2
OEB3
GND
VDD
OEA3
OEA2
OEA1
OEA0
VDD
ICS854S1208I
48-Pin TQFP, E-Pad
7mm x 7mm x 1mm package body
Y Package
Top View
ICS854S1208AYI REVISION A APRIL 27, 2012
1
©2012 Integrated Device Technology, Inc.