dg534a Vishay, dg534a Datasheet

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dg534a

Manufacturer Part Number
dg534a
Description
4-/8-channel Wideband Video Multiplexers
Manufacturer
Vishay
Datasheet

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The DG534A is a digitally selectable 4-channel or dual
2-channel multiplexer. The DG538A is an 8-channel or dual
4-channel multiplexer. On-chip TTL-compatible address
decoding logic and latches with data readback are included to
simplify the interface to a microprocessor data bus. The low
on-resistance and low capacitance of the these devices make
them ideal for wideband data multiplexing and video and audio
signal routing in channel selectors and crosspoint arrays. An
optional negative supply pin allows the handling of bipolar
signals without dc biasing.
Document Number: 70069
S-05734—Rev. G, 29-Jan-02
D Wide Bandwidth: 500 MHz
D Very Low Crosstalk: –97 dB @ 5 MHz
D On-Board TTL-Compatible Latches with
D Optional Negative Supply
D Low r
D Single-Ended or Differential Operation
D Latch-up Proof
Readback
DS(on)
GND
GND
S
S
WR
4/2
RS
D
V+
A1
A2
A
: 45 W
A
1
10
1
2
3
4
5
6
7
8
9
Latches/Drivers
DG534ADJ
4-/8-Channel Wideband Video Multiplexers
Dual-In-Line
Top View
20
19
18
17
16
15
14
13
12
11
NC
D
V–
S
GND
S
V
I/O
EN
A
B1
B2
L
B
0
D Improved System Bandwidth
D Improved Channel Off-Isolation
D Simplified Logic Interfacing
D High-Speed Readback
D Allows Bipolar Signal Swings
D Reduced Insertion Loss
D Allows Differential Signal Switching
The DG534A/DG538A are built on a D/CMOS process that
combines n-channel DMOS switching FETs with low-power
CMOS control logic, drivers and latches. The low-capacitance
DMOS FETs are connected in a “T” configuration to achieve
extremely high levels of off isolation. Crosstalk is reduced to
–97 dB at 5 MHz by including a ground line between adjacent
signal paths. An epitaxial layer prevents latch-up.
For more information refer to Vishay Siliconix applications
note AN502.
GND
S
S
4/2
RS
A1
A2
4
5
6
7
8
3
9
Latch/Drivers
DG534ADN
10
2
Top View
PLCC
D Wideband Signal Routing and
D Video Switchers
D ATE Systems
D Infrared Imaging
D Ultrasound Imaging
11
1
Multiplexing
12
20
19
13
Vishay Siliconix
DG534A/538A
18
17
16
15
14
S
GND
S
V
NC
B1
B2
L
www.vishay.com
1

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dg534a Summary of contents

Page 1

... W DS(on) D Single-Ended or Differential Operation D Latch-up Proof The DG534A is a digitally selectable 4-channel or dual 2-channel multiplexer. The DG538A is an 8-channel or dual 4-channel multiplexer. On-chip TTL-compatible address decoding logic and latches with data readback are included to simplify the interface to a microprocessor data bus. The low ...

Page 2

... DG534A/538A Vishay Siliconix DG538ADJ Dual-In-Line 1 GND GND GND GND 8 Latch/Drivers Top View I ...

Page 3

... Logic “1” Don’t Care Package 20-Pin Plastic DIP DG534ADJ _ 20-Pin PLCC DG534ADN 20-Pin Sidebraze DG534AAP/883, 5962-906021MRC 28-Pin Plastic DIP DG538ADJ _ 28-Pin PLCC DG538ADN 28-Pin Sidebraze DG538AAP/883, 5962-8976001MXA DG534A/538A Vishay Siliconix On Switch Maintains previous state None (latches cleared) ...

Page 4

... DG534A/538A Vishay Siliconix V+ to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V+ to V– V– to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . or 20 mA, whichever occurs first mA, whichever occurs first Current (any terminal) Continuous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Current Pulsed l ms 10% Duty . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 5

... Room Full Full Full Functional Test Only Full Full Room Full Room Full Room Full See Figure 1 Room Full Room Room Room DG534A/538A Vishay Siliconix A Suffix D Suffix –55 to 125_C –40 to 85_C Typ Min Max Min Max –75 –65 –97 – ...

Page 6

... DG534A/538A Vishay Siliconix – – V– EN I/O Decode V L V– REF REF * * V+ I/O V– EN *Typical all Readback (A , EN) pins X www.vishay.com V– Decode Latch ...

Page 7

... 2 V– = – 100 120 –100 –80 25_C –60 –40 –55_C – DG534A/538A Vishay Siliconix Leakage vs. Temperature V– = – D(on) I D(off) I S(off) –40 – Temperature (_C) r vs. V–, V+ ...

Page 8

... DG534A/538A Vishay Siliconix Adjacent Input Crosstalk vs. Frequency –100 V– = – –80 R PLCC –60 –40 – – Frequency (MHz) All Hostile Crosstalk vs. Frequency –100 –80 DIP – V– = –3 V – –20 ...

Page 9

... MPW Write Data Don’t Care t t MPW Device Data* Out FIGURE 1. DG534A/538A Vishay Siliconix Transition Time vs. Temperature t TRANS 75 –40 – Temperature (_C) New Data Don’t Care Hi Z Driven Bus t AI 100 120 www ...

Page 10

... DG534A/538A Vishay Siliconix + – Bn 8/4, 4 I/O GND V– – – 8/4, 4/2 I/O Address Logic GND V– Logic Input –3 V www.vishay.com 10 Logic Input ...

Page 11

... 100 100 1000 100 nF FIGURE 5. Charge Injection DG534A/538A Vishay Siliconix A 50 Turning Off Turning On BBM Interval V O Transition Time (t ) TRANS OUT DV is the measured voltage error due to OUT charge injection ...

Page 12

... DG534A/538A Vishay Siliconix + 8/4 or 4/2 = Logic “0” log X TALK(AH) 10 Note any other one channel on. A1 FIGURE 7. All Hostile Crosstalk Sn–1 S n– Sn – log ...

Page 13

... Allowable Operating Voltage 14 Area 13 (Note –4 –3 –2 –1 Negative Supply Voltage V– (Volts) FIGURE 13. DG534A/538A Vishay Siliconix Meter HP4192A D Impedance B Analyzer or Equivalent V– –3 V Positive Supply Voltage V+ (Volts) www.vishay.com ...

Page 14

... DS(on) causes a frequency dependent attenuation of the analog signal. The –3-dB bandwidth of the DG534A/538A is typically 500 MHz (into 50 W). This figure of 500 MHz illustrates that the switch-channel cannot be represented by a simple RC combination. The on capacitance of the channel is distributed along the on-resistance, and hence becomes a more complex multi-stage network of R’ ...

Page 15

... Power Supplies and Decoupling A useful feature of the DG534A/538A is its power supply flexibility. It can be operated from unipolar supplies (V– connected required. Allowable operating voltage ranges are shown in Figure 13. Note that the analog signal must not go below V– by more than 0.3 V (see absolute maximum ratings). However, the addition of a V– ...

Page 16

... CLC111/CLC114 are recommended ( I Video Data Bus Bus FIGURE 16. DG534A in a Video Matrix (V) L FIGURE 15. Switching Threshold Voltage vs. V DG534A CLC410 ...

Page 17

... Information contained herein is intended to provide a product description only. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right ...

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