PI90LV14LEX Pericom Semiconductor, PI90LV14LEX Datasheet
PI90LV14LEX
Manufacturer Part Number
PI90LV14LEX
Description
Clock Drivers & Distribution 1:5 LVDS Clock Distribution
Manufacturer
Pericom Semiconductor
Type
LVDS, LVTTL, TTLr
Datasheet
1.PI90LV14QE.pdf
(7 pages)
Specifications of PI90LV14LEX
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Multiply / Divide Factor
2:1
Number Of Clock Inputs
2
Number Of Outputs
/
Output Logic Level
LVDS
Maximum Operating Temperature
+ 85 C
Package / Case
TSSOP-20
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Function Table
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2
Pin Descriptions
Features
• Meets and Exceeds the Requirements of ANSI
• Designed for clocking rates up to 320MHz
• Operates from a single 3.3V Supply
• Low Voltage Differential Signaling (LVDS) with Output
• Choice between LVDS or TTL clock input
• Synchronous Enable/Disable
• Clock outputs default LOW when inputs open
• Multiplexed clock input
• 50ps Output-to-Output Skew
• 475ps typical propagation delay
• ±22ps Period Jitter
• Bus Pins are high impedance when disabled or with V
• TTL inputs are 5V Tolerant
• Power Dissipation at 400Mbits/s of 150mW
• Function compatible to Motorola (PECL)
• >9kV ESD Protection
• 20-pin TSSOP (L) (Pb-free available)
* On next negative transition of CLK, or SCLK
TIA/EIA-644-1995
Voltages of ±350mV into a 100-ohm load
– Internal 300kohms pullup resistor on input pins
– CLK & CLK have 110-ohm internal termination (PI90LVT14)
than 1.5V
– MC100EL14 and Micrel/Synergy (PECL)
– SY100EL14V
C
H
X
X
L
L
↓
C
K
C
L
08-0295
L
K
S
, K
S
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1
Description
The PI90LV14 implements low voltage differential signaling (LVDS)
to achieve clocking rates as high as 320MHz with low skew.
The PI90LV14 is a low-skew 1:5 clock distribution chip which
incorporates multiplexed clock inputs to allow for distribution of a
lower-speed, single-ended clock or a high-speed system clock.
When LOWthe SEL pin will select the differential clock input.
The common enable (EN) is synchronous so that the outputs will
only be enabled/disabled when they are already in the LOW state.
This avoids any chance of generating a runt clock pulse when the
device is enabled/disabled as can happen with an asynchronous
control. Because the internal flip-flop is clocked on the falling edge
of the input clock, all associated specification limits are referenced
to the negative edge of the clock input.
The intended application of these devices and signaling technique
is for high-speed clock distribution between boards.
PI90LV14 Block Diagram
CLK1
CLK1
CLK2
CLK2
CLK3
CLK3
CLK4
CLK4
CLK5
CLK5
OUT+
OUT–
OUT+
OUT–
OUT+
OUT–
OUT+
OUT–
OUT+
OUT–
10
1
2
3
4
5
6
7
8
9
PI90LV14/PI90LVT14
1:5 Clock Distribution
Q
D
1
0
110
PI90LVT14
Only
PS8538D
20
19
18
17
16
15
14
13
12
11
V
EN
V
GND
SCLK
CLK
CLK
GND
SEL
GND
CC
CC
10/27/09
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PI90LV14LEX Summary of contents
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... Notes: 1. Thermal characteristics can be found on the company web site at http://www.pericom.com/packaging/mechanicals.php Pb-free and Green 3. Adding X suffix = Tape/Reel Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com 08-0295 4.3 4.5 .047 1.20 SEATING Max PLANE .002 0.05 .006 0.15 Pericom Semiconductor Corporation 3545 N. 1st Street, San Jose, CA 95134 1-800-435-2335 • ...