PACS1284
IEEE 1284 ECP/EPP Termination Network
Features
Product Description
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California Micro Devices’ PACS1284 Parallel Port Termination Network provides a complete integrated solution for the entire IEEE 1284 interface in a single
QSOP package.
Single chip IEEE 1284 parallel port termination
28-pin QSOP package, smallest physical
solution
17 terminating lines in a single package
In-system ESD protection to ±8KV, HBM
In-system ESD protection to ±4KV per
IEC 61000-4-2
Protects downstream devices to 30V
Lead-free version available
To support the bi-directional transfer data rates of
enhanced high-speed parallel ports, the IEEE 1284
Standard recommends a combined termination/pull-up
filter network between the driver/receiver and the cable
at both ends of the parallel port interface. In addition,
government EMC compatibility requirements impose
strict filtering requirements on the parallel port. The
California Micro Devices PACS1284 addresses all
these requirements by providing a seventeen-line IEEE
1284-compliant network in a thin film integrated circuit.
The device provides a complete parallel port termination solution for space critical applications by integrating a total of 60 discrete components. In addition, all
the I/O pins are ESD protected for contact discharges
up to ±4KV per the Human Body Model (HBM), with the
output pins having the highest probability of ESD pulse
exposure protected to ±8KV (HBM), thereby providing
the necessary robustness for the port’s application
environment.
O
bs
Pr o
od le
uc te
t
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Applications
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ECP/EPP Parallel Port termination
PC Peripherals
Notebook and Desktop computers
Engineering Workstations and Servers
The PACS1284 is manufactured in a 28-pin QSOP
package and is available with optional lead-free finishing.
Electrical Schematic
R1 = 2.2kΩ
R2 = 33Ω
R3 = 2.2kΩ
C = 220pF
PACS1284-02:
28
R1
27
R3
R1
26
R1
25
R1
24
R1
R2
C
C
1
C
C
2
C
23
R1
R2
C
3
R1
R2
C
4
22 21
R1
R2
C
5
20
6
19
R3
18
R1
R2
C
R3
C
8
R1
R3
16
R1
R2
C
9
R1 = 4.7kΩ
R2 = 33Ω
R3 = 4.7kΩ
C = 180pF
17
R2
C
7
PACS1284-04:
C
10
15
R1
R2
C
11
C
12
R3
R2
C
13
C
14
© 2004 California Micro Devices Corp. All rights reserved.
06/07/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112 ▲ Tel: 408.263.3214
▲ Fax: 408.263.7846
▲
www.calmicro.com
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