PACS1284-04Q/T [ETC]
APPLICATION SPECIFIC DIODE ARRAY|SO ; 专用二极管阵列| SO\n
| 型号： | PACS1284-04Q/T |
| 厂家： | 
ETC |
| 描述： | APPLICATION SPECIFIC DIODE ARRAY|SO
|
| 文件： | 总5页 (文件大小：81K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
CALIFORNIA MICRO DEVICES
PACS1284
P/Active™ IEEE 1284 ECP/EPP Termination Network
Features
Applications
• 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
• ECP/EPP Parallel Port termination
• PC Peripherals
• Notebook and Desktop computers
• Engineering Workstations and Servers
• In system ESD protection to 4KV per IEC1000-4-2
• Protects downstream devices to 30V
Product Description
California Micro Devices’ PACS1284 Parallel Port
Termination Network provides a complete integrated
solution for the entire IEEE 1284 interface in a single
QSOP package.
ing a seventeen line, IEEE 1284 compliant network in a
thin film integrated circuit. The device provides a com-
plete parallel port termination solution for space critical
applications by integrating a total of 43 discrete compo-
nents. In addition, all I/O pins are ESD protected for
contact discharges up to 4KV per the Human Body
Model. However, the output pins of the device which
have the highest probability of exposure to ESD pulses
are protected to 8KV, HBM, thereby providing the
necessary robustness for the port’s application environ-
ment.
Advanced, enhanced high-speed parallel ports, con-
forming to the IEEE 1284 standard, are used to provide
communications with external devices such as tape
back-up drives, ZIP drives, printers, parallel port SCSI
adapters, external LAN adapters, scanners, video
capture, and other PC peripherals. These advanced
ports support bi-directional transfers to 2MB/sec. To
effectively support these higher transfer data rates, the
IEEE 1284 standard recommends a combined termina-
tion, 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 on the parallel port. California
Micro Devices’ PACS1284Parallel Port Termination
Network addresses all of these requirements by provid-
California Micro Devices’ P/Active technology provides
high reliability and low cost through manufacturing
efficiency. The resistors and capacitors are fabricated
using proprietary state-of-the-art thin film technology.
California Micro Devices’ solution is silicon-based and
has the same reliability characteristics as today’s
integrated circuits.
SCHEMATIC CONFIGURATION
VCC
20
GND
22
28
27
26
25
24
23
21
18
17
16
15
19
R1
C
R1
R1
C
R1
R1
R1
R1
R1
R1
R1
C
R1
R1
C
R1
R1
C
R1
R1
R1
R2
R2
R2
R2
R2
R2
R2
R2
R2
C
C
C
C
C
C
C
C
C
C
C
C
1
13
2
3
4
5
6
7
8
9
10
11
12
14
STANDARD PART ORDERING INFORMATION
Ordering Part Number
Package
Pins
28
RC Code
Style
QSOP
QSOP
Tubes
Tape & Reel
Part Marking
PACS128402Q
PACS128404Q
02
04
PACS1284-02Q/T
PACS1284-04Q/T
PACS1284-02Q/R
PACS1284-04Q/R
28
© 2001 California Micro Devices Corp. All rights reserved.
C1420800
4/24/2001 215 Topaz Street, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
1
PACS1284
CALIFORNIA MICRO DEVICES
STANDARD SPECIFICATIONS
STANDARD VALUES
Absolute Tolerance (R)
±10%
±20%
0°C to 70°C
6V Max
100mW
R1(Ω)
2.2K
4.7K
R2(Ω)
33
33
c(pF)
220
180
RC Code
Absolute Tolerance (C)
Operating Temperature Range
VCC
02
04
Power Rating/Resistor
Maximum Leakage Current
(at VCC Max)
1µA@25°C
Signal Clamp Voltage:
Positive Clamp
>6V
Negative Clamp
<–6V
Storage Temperature
Package Power Rating
–65°C to 150°C
1.00W, Max
ESD SPECIFICATIONS
ESD Protection*
Min
Max
Peak Discharge Voltage at any I/O, Human Body Model, Method 3015 (Note 1)
–4KV
4KV
In System Protection, HBM (Note 2)
–8KV
–4KV
–30V
8KV
4KV
30V
In System Protection, IEC 1000-4-2, Level 2 (Note 1, 2)
Channel Clamp Voltage @ 8KV ESD Pulses, HBM (Note 1, 2)
* Guaranteed by design
Note 1: Human Body Model per MIL-STD-883, Method 3015
C
Discharge = 100pF, RDischarge = 1.5 KΩ, pin 20 @ 5V and pin 22 @ ground.
ESD Contact Discharge from I/O pins 1, 2, 8, 10, 12, 15, 16, 17, 18, 19, 21, 23 through 28 to ground (pin22), one at a time.
Note 2: Pin 22 grounded, pin 20 to VCC, all other pins are open. ESD contact discharge between ground and
pins 1, 2, 8, 10, 12, 15, 16, 17, 18, 19, 21, 23 through 28, one at a time.
Note 3: Standard IEC 1000-4-2 with CDischarge = 150pF, RDischarge = 330Ω, pin 20 @ 5V and pin 22 @ ground.
©2001 California Micro Devices Corp. All rights reserved.
215 Topaz Street, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
4/24/2001
2
CALIFORNIA MICRO DEVICES
PACS1284
Application Information
The IEEE 1284 specification requires both termination and EMI filtering on a total of 17 signal lines. Control and
Status lines (8 in total) only require a pull-up resistor and a filter capacitor. The Data lines and Strobe also require a
series termination resistor in addition to the pull resistors and filter capacitors. See Table 1 and Schematic Diagram.
Series Termination
Yes
Signal Name
Data1 - Data8
Strobe
Yes
Init
Not Required
Not Required
Not Required
Not Required
Not Required
Not Required
Not Required
Not Required
AutoFeedXT
Selectin
Ack
Busy
Paper Empty
Select
Fault
Table 1.
IEEE 1284 defines three interface connectors:
• 1284-A is a 25-pin DB series connector which is the defacto PC standard for the host connection.
• 1284-B is a 36-pin, 0.085 inch centerline connector used on the peripheral device.
• 1284-C is a new 36-pin, 0.050 inch centerline connector which can be used for both host and peripheral.
Figure 1 shows a possible hook-up between the 1284-A connector on a PC motherboard and the PACS1284, illustrat-
ing how the pin configuration of the PACS1284 allows for easy interconnects between the two. The dotted I/O signals
of the PACS1284 will typically be connected to a Super I/O chip on the motherboard.
Figure 2 shows a possible hook-up between the 1284-B connector on a peripheral and the PACS1284.
Figure 3 shows a possible hook-up between the 1284-C connector and the PACS1284.
1284-A Connector
Host
1284-B Connector
Peripheral
1284-C Connector
Host/Peripheral
14
25
36
19
1
36
18
20
2
19
1
18
1
13
SUPER 1284
SUPER 1284
1
SUPER 1284
1
=
GND
=
FLOW
1
THROUGH
SIGNALS
= VCC
Figure 1.
Figure 2.
Figure 3.
Sample Hook-ups of IEEE 1284 Connectors and PACS1284.
(connector and PACS1284 not drawn to scale)
© 2001 California Micro Devices Corp. All rights reserved.
4/24/2001 215 Topaz Street, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
3
PACS1284
CALIFORNIA MICRO DEVICES
Table 2 defines the signals for the three connectors.
IEEE 1284 Connector Pinouts
Pin
1284-A
1284-B
1284-BC
Number
25-pin Dsub
36-pin Champ
36-pin high density
1
2
STROBE
Data1
Data2
Data3
Data4
Data5
Data6
Data7
Data8
ACK
STROBE
Data1
BUSY
Select
3
Data2
ACK
4
Data3
FAULT
PError
Data1
5
Data4
6
Data5
7
Data6
Data2
8
Data7
Data3
9
Data8
Data4
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
ACK
Data5
BUSY
BUSY
Data6
PError
Select
PError
Data7
Select
Data8
AUTOFD
FAULT
INIT
AUTOFD
Not Defined
Logic Ground
Chassis Ground
Peripheral Logic High
Ground
INIT
STROBE
Selectin
AUTOFD
Host Logic High
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Peripheral Logic High
Selectin
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
INIT
FALULT
Not Defined
Not Defined
Not Defined
Selectin
Table 2
When connecting a 1284-A host to a 1284-B peripheral the “Peripheral Logic High” signal is not used. Similarly, when
a 1284-A host is connected to a 1284-C peripheral the “Peripheral Logic High” and “Host Logic High” are not used.
These two signals are optionally used to detect a “Power Off” or “Cable Disconnect” state for host and peripheral
respectively.
©2001 California Micro Devices Corp. All rights reserved.
215 Topaz Street, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
4/24/2001
4
CALIFORNIA MICRO DEVICES
PACS1284
Figure 4 shows typical Insertion Loss graphs for the PACS1284 for Data and Strobe signals. The curves are depen-
dent on the physical location of the filter elements with respect to the ground and VCC terminals of the device. These
graphs are measured in a 50 Ohm environment. The signal is introduced at the series resistor input and the output is
measured at the corresponding filter capacitor. The graphs labeled A,B, and C are measured between 14 (input) and
16 (output), pin 3 (input) and 26 (output), and pin 6 (input) and 23 (output), respectively. The A graph depicts “worst
case” filter performance, while C represents a “best case” situation. Graphs of all other filter elements will fall in
between these two.
S
in dB
12
0
-10
-20
-30
-40
-50
A
B
C
300
450
600
750
900
1050 1200
(FREQUENCY, MHz)
Figure 4.
Typical Filter Insertion Loss for PACS1284 (S12 in dB,TA = 25O C)
Filter insertion loss is measured using Hewlett Packard HP 8753C Analyzer
© 2001 California Micro Devices Corp. All rights reserved.
4/24/2001 215 Topaz Street, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
5
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