83905I Datasheet, PDF (1/21 Pages) Integrated Device Technology – LVCMOS/ LVTTL Fanout Buffer

Low Skew, 1:6 Crystal Interface to
LVCMOS/ LVTTL Fanout Buffer
83905I
Datasheet
General Description
The 83905I is a low skew, 1-to-6 LVCMOS / LVTTL Fanout Buffer.
The low impedance LVCMOS/LVTTL outputs are designed to
drive 50 series or parallel terminated transmission lines. The
effective fanout can be increased from 6 to 12 by utilizing the
ability of the outputs to drive two series terminated lines.
The 83905I is characterized at full 3.3V, 2.5V, and 1.8V, mixed
3.3V/2.5V, 3.3V/1.8V and 2.5V/1.8V output operating supply
modes. Guaranteed output and part-to-part skew characteristics
along with the 1.8V output capabilities makes the 83905I ideal for
high performance, single ended applications that also require a
limited output voltage.
Features
• Six LVCMOS / LVTTL outputs
• Outputs able to drive 12 series terminated lines
• Crystal Oscillator Interface
• Crystal input frequency range: 10MHz to 40MHz
• Output skew: 80ps (maximum)
• RMS phase jitter @ 25MHz, (100Hz – 1MHz): 0.26ps (typical),
V_DD = V_DDO = 2.5V
Offset
Noise Power
100Hz.................-129.7 dBc/Hz
1kHz ...................-144.4 dBc/Hz
10kHz .................-147.3 dBc/Hz
100kHz ...............-157.3 dBc/Hz
• 5V tolerant enable inputs
• Synchronous output enables
• Operating power supply modes:
Full 3.3V, 2.5V, 1.8V
Mixed 3.3V core/2.5V output operating supply
Mixed 3.3V core/1.8V output operating supply
Mixed 2.5V core/1.8V output operating supply
• -40°C to 85°C ambient operating temperature
• Lead-free (RoHS 6) packaging
Pin Assignments
XTAL_OUT 1
ENABLE2 2
GND ₃
BCLK0 4
V_DDO 5
BCLK1 6
GND 7
BCLK2 8
16 XTAL_IN
15 ENABLE1
14 BCLK5
13 VDDO
12 BCLK4
11 GND
10 BCLK3
9 VDD
16-Lead TSSOP
4.4mm x 5.0mm x 0.925mm
package body
G Package
Top View
©2016 Integrated Device Technology, Inc.
Block Diagram
XTAL_IN
XTAL_OUT
ENABLE 1
ENABLE 2
SYNCHRONIZE
SYNCHRONIZE
BCLK0
BCLK1
BCLK2
BCLK3
BCLK4
BCLK5
1
Revision C September 28, 2016