ICS83905I Datasheet, PDF (1/16 Pages) Integrated Circuit Systems – LOW SKEW, 1:6 CRYSTAL INTERFACE-TO LVCMOS/LVTTL FANOUT BUFFER

Integrated
Circuit
Systems, Inc.
ICS83905I
LOW SKEW, 1:6 CRYSTAL INTERFACE-TO-
LVCMOS / LVTTL FANOUT BUFFER
GENERAL DESCRIPTION
The ICS83905I is a low skew, 1-to-6 LVCMOS /
ICS
LVTTL Fanout Buffer and a member of the
HiPerClockS™ _{HiPerClockS™family of High Performance Clock}
Solutions from ICS. The low impedance
LVCMOS/LVTTL outputs are designed to drive
50W series or parallel terminated transmission lines. The ef-
fective fanout can be increased from 6 to 12 by utilizing the
ability of the outputs to drive two series terminated lines.
The ICS83905I 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 mode. Guaranteed output and part-to-part skew
characteristics along with the 1.8V output capabilities makes
the ICS83905I ideal for high performance, single ended appli-
cations that also require a limited output voltage.
FEATURES
• 6 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 = V = 2.5V)
DD
DDO
Phase noise:
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 and 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 package fully RoHS compliant
BLOCK DIAGRAM
XTAL_IN
XTAL_OUT
ENABLE 1
ENABLE 2
SYNCHRONIZE
SYNCHRONIZE
PIN ASSIGNMENT
BCLK0
BCLK1
BCLK2
BCLK3
BCLK4
XTAL_OUT 1
ENABLE 2 2
GND 3
BCLK0 4
VDDo 5
BCLK1 6
GND 7
BCLK2 8
16 XTAL_IN
15 ENABLE 1
14 BCLK5
1 3 VDDO
12 BCLK4
11 GND
10 BCLK3
9 VDD
ICS83905I
16-Lead TSSOP
4.4mm x 5.0mm x 0.92mm body package
G Pacakge
Top View
BCLK5
83905AGI
http://www.icst.com/products/hiperclocks.html
1
REV. B MAY 16, 2005