ICD2051 Cypress Semiconductor Corp., ICD2051 Datasheet - Page 2

• Manufacturer Part Number: ICD2051
• Description: Dual Programmable Clock Generator
• Manufacturer: Cypress Semiconductor Corp.

ICD2051:1/95
Revision: April 11, 1995
Pin Configuration
Pin Summary
Name
SCLKB
MUXREFB
OEB
GND
f
XTALIN
XTALOUT
XBUF
CLKB
CLKA
CLKA/2
CLKA/4
SCLKA
V
OEA
MUXREFA
DATA
Note:
REF
1.
DD
/
For best accuracy, use a parallel-resonant crystal, assume C
[1]
[1]
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Description
Serial clock input line for CLKB
MUXREFB = 0, CLKB equals input reference frequency
MUXREFB = 1, CLKB equals programmed frequency
This is used if glitch-free frequency changes are required.
Three-states CLKB outputs when pulled LOW. (Internal pull-up allows for no-connect if three-state
operation is not needed.)
Ground
Reference Oscillator input for all internal phase-locked loops
Oscillator output to a reference crystal.
Buffered Crystal Oscillator Output
CLKB Programmable Output
CLKA Programmable Output
CLKA divided by 2 (low skew)
CLKA divided by 4
Serial clock input line for CLKA.
+5V
Three-states CLKA outputs when pulled LOW. (Internal pull-up allows for no-connect if three-state
operation is not needed.)
MUXREFA = 0, CLKA equals input reference frequency
MUXREFA = 1, CLKA equals programmed frequency
This is used if glitch-free frequency changes are required.
Serial data input line for both programmable PLLs
f
(REF)
MUXREFB
XTALOUT
/XTALIN
SCLKB
XBUF
CLKB
GND
OEB
LOAD
1
2
3
4
5
6
7
8
= 17 pF.
Top View
SOIC
16
15
14
13
12
11
10
9
2
ICD2051–2
DATA
MUXREFA
OE
V
SCLKA
CLKA/4
CLKA/2
CLKA
DD
A
ICD2051