DATA SHEET
Low Skew, 1-to-10,
Differential-to-LVPECL/ECL Fanout Buffer
853S111AI
853S111AI Rev A 6/30/15 1 ©2015 Integrated Device Technology, Inc.
General Description
The 853S111AI is a low skew, high performance 1-to-10
Differential-to-2.5V/3.3V LVPECL/ECL Fanout Buffer. The
853S111AI is characterized to operate from either a 2.5V or a 3.3V
power supply. Guaranteed output and part-to-part skew
characteristics make the 853S111AI ideal for those clock distribution
applications demanding well defined performance and repeatability.
Features
Ten differential 2.5V, 3.3V LVPECL/ECL outputs
Two selectable differential input pairs
PCLKx, nPCLKx pairs can accept the following
differential input levels: LVPECL, LVDS, SSTL, CML
Maximum output frequency: 2.5GHz
Translates any single-ended input signal to 3.3V LVPECL levels
with resistor bias on nPCLK input
Output skew: 55ps (maximum)
Part-to-part skew: 250ps (maximum)
Propagation delay: 780ps (maximum)
Additive phase jitter, RMS: 0.07ps (typical)
LVPECL mode operating voltage supply range:
V
CC
= 2.375V to 3.465V, V
EE
= 0V
ECL mode operating voltage supply range:
V
CC
= 0V, V
EE
= -3.465V to -2.375V
-40°C to 85°C ambient operating temperature
Available lead-free (RoHS 6) package
853S111AI
32-Lead LQFP
7mm x 7mm x 1.4mm package body
Y Package
Top View
Pin AssignmentBlock Diagram
Q0
nQ0
Q1
nQ1
CLK_SEL
PCLK0
nPCLK0
0
1
Pulldown
Pullup/Pulldown
Pulldown
V
BB
Q2
nQ2
nQ3
nQ3
PCLK1
nPCLK1
Pulldown
Pullup/Pulldown
Q4
nQ4
Q5
nQ5
Q6
nQ6
Q7
nQ7
nQ8
nQ8
Q9
nQ9
1 2 3 4 5 6 7 8
24 23 22 21 20 19 18 17
25
26
27
28
29
30
31
32
16
15
14
13
12
11
10
9
VCCO
nQ2
Q2
nQ1
Q1
nQ0
Q0
V
CCO
VCCO
Q7
nQ7
Q8
nQ8
Q9
nQ9
V
CCO
VCC
CLK_SEL
PCLK0
nPCLK0
V
BB
PCLK1
nPCLK1
V
EE
nQ3
Q4
nQ4
Q5
nQ5
Q6
nQ6
Q3
Rev A 6/30/15 2 LOW SKEW, 1-TO-10, DIFFERENTIAL-TO-LVPECL/ECL FANOUT
BUFFER
853S111AI DATA SHEET
Table 1. Pin Descriptions
NOTE: Pullup and Pulldown refer to internal input resistors. See Table 2, Pin Characteristics, for typical values.
Table 2. Pin Characteristics
Number Name Type Description
1V
CC
Power Positive supply pin.
2 CLK_SEL Input Pulldown
Clock select input. When HIGH, selects PCLK1, nPCLK1 inputs. When LOW,
selects PCLK0, nPCLK0 inputs. LVPECL interface levels. Also accepts standard
LVCMOS/LVTTL input levels.
3 PCLK0 Input Pulldown Non-inverting differential LVPECL clock input.
4 nPCLK0 Input
Pullup/
Pulldown
Inverting differential LVPECL clock input. V
CC
/2 default when left floating.
5V
BB
Output Bias voltage to be connected for single-ended LVPECL input.
6 PCLK1 Input Pulldown Non-inverting differential LVPECL clock input.
7 nPCLK1 Input
Pullup/
Pulldown
Inverting differential LVPECL clock input. V
CC
/2 default when left floating.
8V
EE
Power Negative supply pin.
9, 16, 25, 32 V
CCO
Power Output supply pins.
10, 11
nQ9, Q9
Output Differential output pair. LVPECL/ECL interface levels.
12, 13
nQ8, Q8
Output Differential output pair. LVPECL/ECL interface levels.
14, 15
nQ7, Q7
Output Differential output pair. LVPECL/ECL interface levels.
17, 18
nQ6, Q6
Output Differential output pair. LVPECL/ECL interface levels.
19, 20
nQ5, Q5
Output Differential output pair. LVPECL/ECL interface levels.
21, 22
nQ4, Q4
Output Differential output pair. LVPECL/ECL interface levels.
23, 24
nQ3, Q3
Output Differential output pair. LVPECL/ECL interface levels.
26, 27
nQ2, Q2
Output Differential output pair. LVPECL/ECL interface levels.
28, 29
nQ1, Q1
Output Differential output pair. LVPECL/ECL interface levels.
30, 31
nQ0, Q0
Output Differential output pair. LVPECL/ECL interface levels.
Symbol Parameter Test Conditions Minimum Typical Maximum Units
R
PULLDOWN
Input Pulldown Resistor 75 k
R
VCC/2
Pullup/Pulldown Resistors 50 k
LOW SKEW, 1-TO-10, DIFFERENTIAL-TO-LVPECL/ECL FANOUT
BUFFER
3 Rev A 6/30/15
853S111AI DATA SHEET
Function Tables
Table 3A. Clock Input Function Table
Note 1: Please refer to the Applications Information, “Wiring the Differential Input to Accept Single Ended Levels”.
Table 3B. Control Input Function Table
Inputs Outputs
Input to Output Mode PolarityPCLK0 or PCLK1 nPCLK0 or nPCLK1 Q0:Q9 nQ0:nQ9
0 1 LOW HIGH Differential to Differential Non-Inverting
1 0 HIGH LOW Differential to Differential Non-Inverting
0 Biased; NOTE 1 LOW HIGH Single-Ended to Differential Non-Inverting
1 Biased; NOTE 1 HIGH LOW Single-Ended to Differential Non-Inverting
Biased; NOTE 1 0 HIGH LOW Single-Ended to Differential Inverting
Biased; NOTE 1 1 LOW HIGH Single-Ended to Differential Inverting
Inputs
CLK_SEL Selected Source
0 PCLK0, nPCLK0
1 PCLK1, nPCLK1

853S111AYILF

Mfr. #:
Manufacturer:
IDT
Description:
Clock Drivers & Distribution Low Skew,1-to-10 LVPECL/ECL Fanout
Lifecycle:
New from this manufacturer.
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