CALIFORNIA MICRO DEVICES
PACR4G
High Performance Bus Termination Network
Features
鈥?Designed especially for High Performance
computers/servers
鈥?Provides high speed bus termination
鈥?Reduces ground bounce with ground
pin placement / Ultra low crosstalk
鈥?Terminates 20 lines in a QSOP package
Applications
鈥?High Performance servers
鈥?High Performance desk top systems
鈥?GTL, NTL, ECL terminator
Product Description
High speed microprocessors demand unique, high
speed bus termination. The PACR4G Termination
Network provides 20 terminations per package and
meets the requirements for high speed terminations.
This Termination Network provides high performance,
high reliability, and low cost through manufacturing
efficiency. The termination resistor elements are
fabricated using state-of-the-art thin film manufacturing.
This integrated solution is silicon-based and has the
same reliability characteristics as any of today鈥檚 micro-
processor products. The thin film resistors have very
high stability over temperature, over applied voltage and
over life. In addition the QSOP industry standard
packaging is easy to handle in manufacturing and yields
a high reliability similar to other semiconductor compo-
nents.
S TA N D A R D S P E C I F I C AT I O N S
Absolute Tolerance (R)
Operating Temperature Range
Power Rating/Resistor
Storage Temperature
Package Power Rating
Crosstalk
鹵1%
0擄C to 70擄C
100mW
鈥?5擄C to 150擄C
1.00w, Max
<鹵2% typical
R
24 23
R
SCHEMATIC CONFIGURATION
22
R
21 20 19
R
R
18 17 16 15
R
R
R
14
R
13
R
R
R
R
R
R
R
R
R
R
R
S TA N D A R D VA L U E S
R (W)
47
50
56
68
90
Code
470
500
560
680
900
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4
5
6
7
8
9
10
11 12
S TA N D A R D PA R T O R D E R I N G I N F O R M AT I O N
Package
R Code
470
500
560
680
900
Pins
24
24
24
24
24
Style
QSOP
QSOP
QSOP
QSOP
QSOP
Ordering Part Number
Tubes
PAC470R4GQ/T
PAC500R4GQ/T
PAC560R4GQ/T
PAC680R4GQ/T
PAC680R4GQ/T
Tape & Reel
PAC470R4GQ/R
PAC500R4GQ/R
PAC560R4GQ/R
PAC680R4GQ/R
PAC680R4GQ/R
Part Marking
PAC470R4GQ
PAC500R4GQ
PAC560R4GQ
PAC680R4GQ
PAC680R4GQ
C0970500
漏 2000 California Micro Devices Corp. All rights reserved.
7/18/2000
215 Topaz Street, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
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