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Integrated Device Technology Electronic Components Datasheet

8T39S08A Datasheet

Crystal or Differential to Differential Clock Fanout Buffer

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Crystal or Differential-to-Differential
Clock Fanout Buffer
8T39S08A
Datasheet
General Description
The 8T39S08A is a high-performance clock fanout buffer. The input
clock can be selected from two differential inputs or one crystal input.
The internal oscillator circuit is automatically disabled if the crystal
input is not selected. The crystal pin can be driven by a single-ended
clock. The selected signal is distributed to eight differential outputs
which can be configured as LVPECL, LVDS and HCSL outputs. In
addition, an LVCMOS output is provided. All outputs can be disabled
into a high-impedance state. The device is designed for a signal
fanout of high-frequency, low phase-noise clock and data signal. The
outputs are at a defined level when inputs are open or tied to ground.
It is designed to operate from a 3.3V or 2.5V core power supply, and
either a 3.3V or 2.5V output operating supply.
Features
Two differential reference clock input pairs
Differential input pairs can accept the following input levels:
LVPECL, LVDS, HCSL, HSTL and Single-ended
Crystal Oscillator Interface
Crystal input frequency range: 10MHz to 40MHz
Maximum Output Frequency
LVPECL - 2GHz
LVDS - 2GHz
HCSL - 250MHz
LVCMOS - 250MHz
Two banks, each has four differential output pairs that can be
configured as LVPECL or LVDS or HCSL
One single-ended reference output with synchronous enable to
avoid clock glitch
Output skew: 80ps (maximum)
(Bank A and Bank B at the same output level)
Part-to-part skew: 200ps (typical)
Additive RMS phase jitter@ 156.25MHz, (12kHz - 20MHz):
34.7fs (typical), 3.3V/ 3.3V
Supply voltage modes:
VDD/VDDO
3.3V/3.3V
3.3V/2.5V
2.5V/2.5V
-40°C to 85°C ambient operating temperature
Lead-free (RoHS 6) packaging
©2016 Integrated Device Technology, Inc.
1
May 19, 2016


Integrated Device Technology Electronic Components Datasheet

8T39S08A Datasheet

Crystal or Differential to Differential Clock Fanout Buffer

No Preview Available !

Block Diagram
PullDown
PullDown
8T39S08A Datasheet
PullDown
PullDown
Pin Assignment
GND
SMODEB1
nCLK1
CLK1
VDD
REFOUT
VDDOREF
OE_SE
SMODEA1
GND
30 29 28 27 26 25 24 23 22 21
31 20
32 19
33 18
34
35
36 8T39S08A
37
38
39
40
17
16
15
14
13
12
11
GND
SMODEB0
REF_SEL1
nCLK0
CLK0
REF_SEL0
XTAL_OUT
XTAL_IN
VDD
SMODEA0
1 2 3 4 5 6 7 8 9 10
40-pin, 6mm x 6mm VFQFN
©2016 Integrated Device Technology, Inc.
2
May 19, 2016


Part Number 8T39S08A
Description Crystal or Differential to Differential Clock Fanout Buffer
Maker IDT
Total Page 30 Pages
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