錚?/div>
Features
鈥?Designed especially for Pentium Pro and RISC-
based computers/servers
鈥?Provides high speed bus termination
鈥?Reduces ground bounce with center ground
pin placement
鈥?Terminates 22 lines in a QSOP package
鈥?Saves board space and reduces assembly cost
Product Description
CAMD鈥檚 P/Active RG GTL+ Local Bus Terminator is ideal
for Pentium Pro and related high speed bus termination
applications where a resistor approach is deemed suitable.
This device also meets the high-speed bus termination
demands of microprocessors like Motorola鈥檚 PowerPC,
DEC鈥檚 Alpha, Sun鈥檚 SPARC, and SGI鈥檚 MIPs processor, as
well as other high performance RISC processors for
embedded control applications.
The PACRG offers 22 terminations per package and meets
all related Intel specifications for Pentium Pro termination
requirements. Four popular values are available for a
variety of bus termination applications and line impedance
requirements: 47, 50, 56 and 68 ohms.
The P/Active RG Termination Networks provide high
performance, high reliability, and low cost through manu-
facturing efficiency. The termination resistor elements are
fabricated using proprietary state-of-the-art thin film
technology. CAMD鈥檚 highly integrated solution is silicon-
based and has the same enhanced reliability characteris-
tics as today鈥檚 microprocessor products. The thin film
resistors have very high stability over a wide temperature
range, over applied voltage, and over life. In addition, the
QSOP industry standard packaging is manufacturing-
friendly and yields the high reliability of other semiconduc-
tor components. The P/Active RG Pentium Pro Termination
Network provides a complete 300 point termination
solution in only 14 QSOP packages.
Refer to AP-201 Termination Application Note and AP-203 GTL+
Termination Application Note for further information.
Applications
鈥?Pentium Pro servers
鈥?Pentium Pro desk top systems
鈥?GTL, ECL terminator for embedded
processor busses
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
鹵5%
0擄C to 70擄C
100mW
鈥?5擄C to 150擄C
1.00w, Max
R
T
24 23
R
T
22
PIN DIAGRAM
21 20 19
18 17 16 15
14
13
S TA N D A R D VA L U E S
R (
鈩?/div>
)
47
50
56
68
Code
470
500
560
680
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2
3
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(1%)
500(1%)
560(1%)
680(1%)
Pins
24
24
24
24
Style
QSOP
QSOP
QSOP
QSOP
Ordering Part Number
Tubes
PAC470RGQ/T
PAC500RGQ/T
PAC560RGQ/T
PAC680RGQ/T
Tape & Reel
PAC470RGQ/R
PAC500RGQ/R
PAC560RGQ/R
PAC680RGQ/R
Part Marking
PAC470RGQ
PAC500RGQ
PAC560RGQ
PAC680RGQ
+ ' "
漏 2000 California Micro Devices Corp. All rights reserved.
8/10/2000
215 Topaz Street, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
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