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Details, datasheet, quote on part number:GX214A
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| Part: | GX214A |
| Category: | Analog & Mixed-Signal Processing => Switches & Multiplexers => Analog Multiplexers/Demultiplexers |
| Description: | Monolithic 4x1video Multiplexer |
| Company: | Gennum Corporation |
| Datasheet: | Download GX214A datasheet File size : 168 kB |
| Request For quote: | Find where to buy GX214A
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Datasheet text preview:
F
GX214A Monolithic 4x1 Video Multiplexer
DATA SHEET
FEATURES · low cost · differential gain at 3.58 MHz, 0.05% max. · differential phase at 3.58 MHz, 0.05 deg. max. · off-isolation better than 90 dB at 10 MHz · all hostile crosstalk at 3.58 MHz, 75 dB typ. (RIN= 75 ) · make-before-break switching UNCTIONAL BLOCK DIAGRAM
IN 0 I N1 I N2 I N3 A X X X X
OUTPUT
C I R C U I T DESCRIPTION The GX214A is a low cost 4x1 video multiplexer containing four analog video switches and a 2 to 4 decoder. A Chip Select input allows paralleled GX214As to be operated in a switching matrix. The GX214A represents a fully buffered, unilateral transmission path when enabled. When disabled, the output is high impedance. The device operates from ± 7.5 V to ± 9.5 V supplies with TTL and 5 V CMOS compatible input logic levels. APPLICATIONS · CATV and CCTV systems · low cost video routing
Pin 1 IN 0 SIG GND 14 VCC A AO C1 OS L UT OGIC GND 7 8 VEE
A0 1
2 TO 4 DECODER L OGIC
S CHIP ELECT
CS
IN 1 SIG GND IN 2
TRUTH TABLE
CS 0 0 0 0 1 A1 0 0 1 1 X A0 0 1 0 1 X OUTPUT IN 0 IN 1
SIG GND IN 3
PIN CONNECTION 14 PIN DIP
14
IN 0
Pin 1
IN 2 IN 3 HI - Z
ACC AO C1 OS L UT OGIC GND
SIG GND S IN 1 IG GND IN 2 SIG GND IN 3 7 8
X = DON'T CARE
VEE V
ORDERING INFORMATION
Part Number GX214 - ACDB GX214 - ACKC GX214 - ACKB Package Type 14 Pin DIP 16 Pin SOIC 14 Pin SOIC Temperature Range 0° to 70°C 0° to 70°C 0° to 70°C
IN 0 SIG GND IN 1 SIG GND IN 2 SIG GND IN 3 NC
PIN CONNECTION 14 PIN SOIC
Pin 1
16
NCC
AC AO C1 OS L UT OGIC GND 8 9 VEE
PIN CONNECTION 16 PIN SOIC
Document No. 520 - 5 - 1
GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 tel. (905) 632-2996 fax: (905) 632-5946
Japan Branch: A-302 Miyamae Village, 2-10-42 Miyamae, Suginami-ku, Tokyo 168, Japan tel. (03) 3334-7700 fax: (03) 3247-8839
ABSOLUTE MAXIMUM RATINGS
Parameter Supply Voltage Operating Temperature Range Storage Temperature Range Value ± 10.0 V 0 °C TA 70 °C -65 °C TS 150 °C Parameter Lead Temperature (Soldering, 10 Sec) Analog Input Voltage Logic Input Voltage Value 260 °C -4 V V IN V CC+0.3 V 0 V VL 5.5 V
NOTE: A short from output to ground or either supply will destroy the device. For REXT use a 2.67 k 1%, 1/4 W resistor.
ELECTRICAL CHARACTERISTICS
PARAMETER Supply Voltage DC SUPPLY Supply Current not including I L Analog Output Voltage Swing STATIC Analog Input Bias Current Output Offset Voltage
VS = ± 8 V DC, 0°C < TA < 70 °C, R L = 2.67 k to V EE , CL = 30pF I L = 3mA SYMBOL ± VS I+ Chip selected (CS=0) Chip not selected (CS=1) IChip selected (CS=0) Chip not selected (CS=1) V OUT I IN V OS t ON t OFF V IH V IL I BIAS 75 resistor on each input to ground Control input to appearance of signal at output. Extremes before clipping occurs 25 CONDITIONS MIN 7.5 TYP 8.0 14 0.5 13 0.58 MAX 9.5 20 0.85 18 0.88 +5.0 -1.2 µA mV UNITS V mA mA mA mA V
+5
-30
-70
Turn-On Time
-
250
400
ns
Turn-Off Time
Control input to disappearance of signal at output.
500
750
-
ns
LOGIC
Logic Input Thresholds Logic Input Bias Current Insertion Loss
1 0 Chip Selected A0,A1 = 1 Chip Selected A0,A1 = 0
2.4 0.05
0.08
0.6 1 2 0.11
V V nA µA dB
I.L.
1V p-p sine or sq. wave at 100 kHz
Bandwidth (-3dB) Input Resistance
DYNAMIC
B.W. R IN CIN Chip selected (CS = 0) Chip selected (CS = 0) Chip not selected (CS=1)
65 900 72 90
85 2.0 2.2 14 12 75 100
0.05 0.05 -
MHz k pF pF pF % deg. dB dB
Input Capacitance
Output Resistance Output Capacitance Differential Gain Differential Phase All Hostile Crosstalk Chip Disabled Crosstalk
R OUT COUT dg dp X TALK(AH) X TALK(CD)
Chip selected (CS=0) Chip not selected (CS=1) at 3.58 MHz V IN = 40 IRE Sweep on 3 inputs 1V p-p 4th input has 75 resistor to gnd. = 10 MHz One xpt on output to ground = 10 MHz
520 - 5 - 1
2
A P P L I C A T I O N INFORMATION The circuit layout of any wideband circuit is critical. Good high frequency design practice, proper lead dress and PCB component placement along with a well regulated and decoupled power supply will assure optimum performance of the crosspoint. The GX214A is non-inverting. The inputs are buffered and require 75 line terminating resistors when driven from 75 cable. The inputs may be driven directly from an amplifier which has low output impedance. The output of the GX214A must be buffered to drive 7 lines. The addition of an amplifier/buffer also allows adjustments to be made to the gain, offset and frequency response of the circuit. Signal Ground (SG) pins 2, 4 and 6 must be joined together and preferably form part of a ground plane. The Signal Ground must also be connected to the ± 8V power supply ground. The potential of the Logic Ground (LG) pin 9 can deviate from the Signal Ground by ±0.5V maximum. Alternatively, the signal and logic grounds can be joined together at one point only. An external load current of 2 to 8mA should be supplied from each output bus to negative supply. For most applications a load resistor of 2.67k, 1% is recommended to minimize offset drift with temperature. In order to improve differential phase and tighten the insertion loss tolerance, an external constant current active load may be substituted for the load resistor. Note however, that since only one GX214A output drives the output bus at any one time, only one external load is needed for the bus. A typical application is shown below. Two GX214A ICs are paralleled to form an 8x1 crosspoint matrix. The three address lines make use of the A0, A1 and CS inputs. If more than two devices are used in parallel, a decoder is necessary in order to generate the extra address inputs. Depending on the application and the speed of the logic family used, latches may be required for synchronization where timing delays are critical. The active switching circuitry of the GX214A ensures low crosstalk and high performance over an input voltage range of -1.2 to +5.0 volts.
INPUTS
VIDEO SWITCHES
0.1 +8V
1 V0 2 3 V1 4 5 V2 6 7 V3 75 75 75 75
IN 0 I SG N1 SG IN 2 SG IN 3 0.1
+V
14 13 A0 A 1 ADDRESS A2
A0 12 A1 CS OUT LG -V 11 10 9 8
-8V
+8V 0.1
V4
1 IN 0 2 SG IN 1 SG IN 2 SG IN 3 0.1
+V A0
14 13 GAIN, OFFSET, FREQUENCY R ESPONSE ADJUSTMENTS
V5
3 4
V6
5 6
V7 75 75
7
A 1 12 11 CS 10 OUT 9 LG 8 -V
V 75 2.67 K
OUT
AMPLIFIER/BUFFER
75
75
-8V
All resistors in ohms, all capacitors in microfarads, unless otherwise stated
Fig. 1 8x1 Video Multiplexer Incorporating Two GX214A Devices
3
520 - 5 - 1
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