PACAC Datasheet, PDF (1/2 Pages) California Micro Devices Corp – P/ACTIVE AC TERMINATION NETWORK

CALIFORNIA MICRO DEVICES
PACAC
P/ACTIVE AC TERMINATION NETWORK
Features
• High Frequency Performance
• Miniature QSOP Package
• 18 terminating lines/package
• Stable resistor-capacitor network
Applications
• AC Termination
• Low Pass Filtering
Refer to AP-201 Termination Application Note for
further information.
Product Description
Note: CAMD’s P/Active AC Integrated Resistor-Capacitor Termination Network is an upgraded version of the original
PRC202/212 series. PACAC provides 2KV ESD protection, minimized lead inductance and parasitic capacitive effects
(with added ground pins), improved termination characteristics, and frequency response at high data transmission rates.
The PACAC is recommended for all new designs.
This integrated thin film resistor-capacitor network is designed to eliminate transmission line effects on high speed data
lines. Incorporating CAMD’s P/Active AC Integrated Resistor-Capacitor Termination Network will result in improved board
yields and reliability, minimized space and routing problems on the board, and reduced assembly costs. This highly
integrated network requires no DC power dissipation.
Why P/Active termination networks? A terminating RC is used to reduce or eliminate reflections on a transmission line. It
can perform this function only when its impedance value matches the characteristic impedance of the transmission line across a
broad frequency spectrum.
Passive components affect the electrical performance of electronic systems. In reality, every resistor has some parasitic
series inductance and a parasitic capacitance; and every capacitor has both series resistance and inductance. At low
speeds, these parasitics do not affect the performance of resistors and capacitors. However, at higher speeds, these
parasitics cause mismatch in a termination. To prevent these problems in high speed digital designs, a designer must take
special care in selecting passive components or networks.
The PACAC family of devices provides consistent and predictable behavior over a higher frequency range than discrete
components or any previous network products.
STANDARD SPECIFICATIONS
Absolute Tolerance (R)
±10%
Absolute Tolerance (C)
±10%
Operating Temperature Range
0°C to 70°C
Crosstalk (See Text Circuit)
<5% (typical)
Power Rating/Resistor
100mW
ESD Clamp
Positive Clamp
>6V
Negative Clamp
ESD Protection
<-6V
(per MIL-STD-833, Method 3015) >2KV
Storage Temperature
-60°C to 150°C
Package Power Rating
1.00W, max.
SCHEMATIC CONFIGURATION
24 23 22 21 20 19 18 17 16 15 14 13
1 2 3 4 5 6 7 8 9 10 11 12
R(Ω)
33
47
47
75
100
STANDARD VALUES
C(pf)
fmax* @
R±10%
Time
Constant (ns)
47
1 GHz
1.55
47
1 GHz
2.21
33
1 GHz
1.55
50
1 GHz
3.75
100 1 GHz
10.0
RC Code
330/470
470/470
470/330
750/500
101/101
*Maximum frequency where the real part of the impedance of the AC
termination is within 10% tolerance of the designed resistance R.
© 2000 California Micro Devices Corp. All rights reserved.
4/00
215 Topaz Street, Milpitas, California 95035
Tel: [phone]
Fax: [phone]
www.calmicro.com
C0840400
1