8T39S08A Datasheet, PDF (1/39 Pages) Integrated Device Technology – Crystal or Differential-to-Differential Clock Fanout Buffer

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:
V_DD/V_DDO
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