W173 Просмотр технического описания (PDF) - Silicon Laboratories
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W173 Datasheet PDF : 5 Pages
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W173
Tape Drive Frequency Timing Generator
Features
• Four derived outputs at frequencies specified by
Hewlett Packard Computer Peripherals Bristol/Boise
(CPB)
• Less than ±250 ps cycle-to-cycle jitter
(13.2 MHz clock excluded derated to ±400 ps)
• Less than ±350 ps absolute jitter
• Supports 3.3V operation
• TTL compatible logic: VIL = 0.8V max., VIH = 2.0V min.,
VOL = 0.4V max., and VOH = 2.4V min.
• OE pin has internal pull-up
Block Diagram
• 45/55% duty cycle on all outputs
• 15 output drivers
• Accepts 26.5625 MHz input reference
• Built-in crystal oscillator circuit. Capacitive load
presented to the crystal is approximately 14 pF
• Outputs designed to drive 30 pF loads
• Available in 16-pin SOIC package
Functional Description
The W173 has been defined to meet the timing signal require-
ments for Hewlett Packard CPB tape drive system.
S
Pin Configuration
REFIN
XTAL
OSC
PLL 1
13.2 MHz
6.6 MHz
VDD
1
X1
2
X2
3
GND
4
OE
5
VDD
6
50MHZ
7
GND
8
16
VDD
15
6.6MHZ
14
GND
13
13.2MHZ
12
VDD
11
GND
10
10MHZ
9
VDD
PLL 2
OE
50 MHz
10 MHz
..........Document #: 38-07313 Rev. *B Page Page 1 of 5 of 5
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