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85311AMLFT

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
1©2016 Integrated Device Technology, Inc. Revision E, February 18, 2016
General Description
The 85311 is a low skew, high performance 1-to-2 Differential-to-
2.5V/3.3V ECL/LVPECL Fanout Buffer and a member of the high
performance clock solutions from IDT. The CLK, nCLK pair can
accept most standard differential input levels. The 85311 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
85311 ideal for those clock distribution applications demanding well
defined performance and repeatability.
Features
• Two differential 2.5V/3.3V LVPECL / ECL outputs
• One CLK, nCLK input pair
• CLK, nCLK pair can accept the following differential input levels:
LVDS, LVPECL, LVHSTL, SSTL, HCSL
• Maximum output frequency: 1GHz
• Translates any single ended input signal to 3.3V LVPECL levels
with resistor bias on nCLK input
• Output skew: 15ps (maximum)
• Part-to-part skew: 100ps (maximum)
• Propagation delay: 1.4ns (maximum)
• Additive phase jitter, RMS: 0.14ps (typical), 3.3V
• 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
= -2.375V to -3.465V
• 0°C to 70°C ambient operating temperature
• Available in lead-free (RoHS 6) package
Q0
nQ0
Q1
nQ1
CLK
nCLK
Pullup
Pulldown
1
2
3
4
8
7
6
5
VCC
CLK
nCLK
V
EE
Q0
Q1
nQ1
nQ0
85311
8-Lead SOIC
3.90mm x 4.903mm x 1.37mm package body
M Package
Top View
Pin Assignment
Block Diagram
Low Skew, 1-to-2, Differential-to-2.5V, 3.3V
LVPECL/ ECL Fanout Buffer
85311
Datasheet
2©2016 Integrated Device Technology, Inc. Revision E, February 18, 2016
85311 Datasheet
Pin Descriptions and Pin Characteristic Tables
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
1, 2 Q0, nQ0 Output Differential output pair. LVPECL interface levels.
3, 4 Q1, nQ1 Output Differential output pair. LVPECL interface levels.
5V
EE
Power Negative supply pin.
6 nCLK Input Pullup Inverting differential clock input.
7 CLK Input Pulldown Non-inverting differential clock input.
8V
CC
Power Positive supply pin.
Symbol Parameter Test Conditions Minimum Typical Maximum Units
C
IN
Input Capacitance 4pF
R
PULLUP
Input Pullup Resistor 51 k
R
PULLDOWN
Input Pulldown Resistor 51 k
3©2016 Integrated Device Technology, Inc. Revision E, February 18, 2016
85311 Datasheet
Absolute Maximum Ratings
NOTE: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device.
These ratings are stress specifications only. Functional operation of product at these conditions or any conditions beyond
those listed in the DC Characteristics or AC Characteristics is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect product reliability.
DC Electrical Characteristics
Table 3A. Power Supply DC Characteristics, V
CC
= 3.3V±5% or 2.5V±5%, V
EE
= 0V, T
A
= 0°C to 70°C
Table 3B. Differential DC Characteristics, V
CC
= 3.3V±5% or 2.5V±5%, V
EE
= 0V, T
A
= 0°C to 70°C
NOTE 1: V
IL
should not be less than -0.3V.
NOTE 2: Common mode voltage is defined as V
IH
.
Table 3C. LVPECL DC Characteristics, V
CC
= 3.3V±5% or 2.5V±5%, V
EE
= 0V, T
A
= 0°C to 70°C
NOTE1: Outputs terminated with 50 to V
CC
– 2V.
Item Rating
Supply Voltage, V
CC
4.6V
Inputs, V
I
-0.5V to V
CC
+ 0.5V
Outputs, I
O
Continuous Current
Surge Current
50mA
100mA
Storage Temperature, T
STG
-65C to 150C
Package Thermal Impedance,
JA
103C/W (0 lfpm)
Symbol Parameter Test Conditions Minimum Typical Maximum Units
V
CC
Positive Supply Voltage
3.135 3.3 3.465 V
2.375 2.5 2.625 V
I
EE
Power Supply Current 25 mA
Symbol Parameter Test Conditions Minimum Typical Maximum Units
I
IH
Input High Current
nCLK V
CC
= V
IN
= 3.465V or 2.625V 5 µA
CLK V
CC
= V
IN
= 3.465V or 2.625V 150 µA
I
IL
Input Low Current
nCLK V
CC
= 3.465V or 2.625V, V
IN
= 0V -150 µA
CLK V
CC
= 3.465V or 2.625V, V
IN
= 0V -5 µA
V
PP
Peak-to-Peak Input Voltage;
NOTE 1
0.15 1.3 V
V
CMR
Common Mode Input Voltage;
NOTE 1, 2
V
EE
+ 0.5 V
CC
– 0.85 V
Symbol Parameter Test Conditions Minimum Typical Maximum Units
V
OH
Output High Current; NOTE 1 V
CC
– 1.4 V
CC
– 0.9 V
V
OL
Output Low Current; NOTE 1 V
CC
– 2.0 V
CC
– 1.7 V
V
SWING
Peak-to-Peak Output Voltage Swing 0.65 1.0 V
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

85311AMLFT

Mfr. #:
Buy 85311AMLFT
Manufacturer:
IDT
Description:
Clock Drivers & Distribution 1-to-2 LVPECL Fanout Buffer
Lifecycle:
New from this manufacturer.
Delivery:
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