Document No. 520 - 21 - 2
GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 tel. (416) 632-2996 fax: (416) 632-2055 telex: 061-8525
Japan Branch: B-210 Miyamae Village, 2-10-42 Miyamae, Suginami-ku, Tokyo 168, Japan tel. (03) 3247-8838 fax: (03) 3247-8839
CIRCUIT DESCRIPTION
The GY4102A is a bipolar, monolithic SPDT video switch
incorporating fast control logic. The analog signal path is
characterised by low differential gain, low differential phase
and low insertion loss, coupled with a
0.1 dB bandwidth
of typically 100 MHz into a 10 pF load, using an external
series resistor.
In demanding video applications the GY4102A features a
typical switching glitch of less than 30 mV over a 3 ns
period. The device offers toggle rates up to 50 MHz. The
control input is TTL and 5 V CMOS compatible.
APPLICATIONS
Sub-pixel video switching
Fast data sampling
Modulation
Special Effects video switching
TOP VIEW
4
5
8
PIN 1
OUT
V
EE
IN 0
IN 1
CTRL
V
CC
8 PIN PDIP
8 PIN SOIC
0 IN 0
1 IN 1
CTRL OUTPUT
PIN CONNECTIONS
TRUTH TABLE
AVAILABLE PACKAGING
8 pin PDIP
8 pin SOIC
CTRL
IN 1
IN 0
CONTROL
LOGIC
OUT
GND 1
GND 2
FEATURES
FUNCTIONAL BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
PARAMETER
VALUE
Supply Voltage
6.0 V
Operating Temperature Range
0
C to 70
C
Storage Temperature Range
-65
C to 150
C
Lead Temperature
(Soldering, 10 Sec)
260
C
Analog Input Voltage (
IN 0, IN 1
)
V
EE
<V
IN
<V
CC
+0.3 V
Control Input Voltage Range -5 V < V
CTRL
< V
CC
+0.3 V
ORDERING INFORMATION
Part Number Package Type Temperature Range
GY4102ACDA
8 pin PDIP
0 - 70
o
C
GY4102ACKA
8 pin SOIC
0 - 70
o
C
DATA SHEET
20 ns switching time (toggle)
make-before-break switching
100 MHz at
0.1dB, bandwidth (flattened)
typically 0.04 dB insertion loss at 1 MHz
typically 0.03 % differential gain at 3.58 MHz
typically 0.01 degree differential phase at 3.58 MHz
GY4102A Fast Toggling
Video Switch
520 - 21 - 2
2
Delay Time
t
d (on 1)
-
5.4 9 ns
t
d (on 2)
- 8.2 13 ns
(see Figure 7)
t
d (off 1)
-
6 11 ns
t
d (off 2)
-
12.5 22 ns
Settling Time
t
S (on)
To 0.5 IRE on 0 to 1 V output,
(see Figure 7a)
T
A
= 25
-
9 15 ns
(see Figure 7b)
t
S (off)
To 0.5 IRE on 1 to 0 V output,
T
A
= 25
C
-
7 15 ns
Switching Transient *
Amplitude
-
+30 +50 mV
(Unfiltered)
Duration
-
3 5 ns
Amplitude
-
-20 -30 mV
Duration
-
2
3 ns
*
CH0 = CH1 = GND
NEG.
(V
S
=
5V DC, T
A
= 0 - 70
C, C
L
= 10pF, R
L
= 10 k
unless otherwise shown)
Supply Voltage
V
S
4.5
5
5.5
V
DC
Supply Current
I+
-
23
30
mA
SUPPLY
I-
-
25
32
mA
Control Input Bias
I
CTRL
Control = 1
-
5
25
A
LOGIC
Logic Level threshold
V
LOGIC
1
2
-
-
V
0
-
-
0.8
V
Analog Input
I
BIAS
Selected channel
-
12
30
A
Bias Current
Deselected channel
-
26
60
A
Signal Voltage Swing
V
SIG
Extremes before clipping occurs
-1.5
-
+3
V
STATIC
Output Offset Voltage
V
OS
T
A
= 25
C
-6
+4
+14
mV
Output Offset Voltage
V
OSCH-CH
T
A
= 25
C channel to channel
-
1
5
mV
Output Offset Drift
V
OS
/T
-
+93
+200
V/
C
Input Resistance
R
IN
Channel On
500
-
-
k
Input Capacitance
C
IN
Channel On
1.3
-
-
pF
Frequency Response
DC - 100 MHz R
S
= 33
-
0.2
-
dB
DYNAMIC
Flatness
DC - 8 MHz R
S
= 33
-
-
0.01
dB
Insertion Loss
I.L.
= 1 MHz
-
0.04
-
dB
Differential Gain
dg
= colorburst 3.58 or 4.43 MHz
-
0.03
-
%
Differential Phase
dp
= colorburst 3.58 or 4.43 MHz
-
0.01
-
degrees
Crosstalk (all hostile)
XTALK
AH
= 10 MHz see fig. 3
75
80
-
dB
Slew Rate
+SR
400
620
-
V/
s
-SR
V
IN
= 2 Vp-p T
A
= 25
C
250
330
-
V/
s
ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
SWITCHING CHARACTERISTICS
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX UNITS
V
SIG
= 1 - 0 V
V
SIG
= 0 - 1 V
POS.
(V
S
=
5V, T
A
= 0 - 70
C, C
L
=10pF, R
S
= 33
, R
L
= 10 k
)
520 - 21 - 2
3
3
2
1
0
-1
-2.0
-3
TYPICAL PERFORMANCE CURVES FOR GY4102A
An evaluation board and application note on the GY4102A is available.
Please quote EB4102 for the board and AN 520 - 2 for the application note.
There is no charge for these items.
0.05
0.04
0.03
0.02
0.01
0
-0.01
-0.02
-0.03
-0.04
-0.05
Fig. 4 GY4102A Differential Gain & Phase
dg
dp
1
10
100
FREQUENCY (MHz)
0.04
0
-0.04
-0.08
-0.12
-0.16
C
L
= 0 pF
C
L
= 22 pF
C
L
= 10 pF
CH-1
Fig. 1 GY4102A Frequency Response
CH-0
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
10
30 100
300
FREQUENCY (MHz)
dB
dB
dB
Fig. 3 GY4102A Crosstalk vs Frequency
1
10 100
400
FREQUENCY (MHz)
1
3 5 10
FREQUENCY (MHz)
dg ( % ) dp (
deg )
Fig. 2 GY4102A Flattened Frequency Response
C
L
= 33 pF
R
S
= 0
R
L
= 10 k
R
S
= 33
C
L
= 10 pF
R
L
= 10 k
520 - 21 - 2
4
+5V
1
5
8
6
7
2
3
B*
10K
0.1
*
USE ULTRA LOW CAPACITANCE SCOPE PROBES AT POINTS A & B
PULSE GENERATOR CHARACTERISTICS tr = t 1 ns Vo = 5V prr 20 MHz
GY4102A
4
A*
FOR TIME
DELAY TEST
+1V
PULSE
GENERATOR
FOR
TRANSIENT
TEST
1H
-5V
1H
IN-1
0.1
1H
+5V
1
5
8
6
7
2
3
3K
75
IN-0
RS
C
L
0.1
75
-5V
OUTPUT TO NETWORK
ANALYSER VIA UNITY
GAIN BUFFER
GY4102A
4
CH-0
CH-1
1H
Fig. 6 Switching Transient / Time Delays
t
r
= t
1 ns V
o
= 5 V p
rr
20 MHz
0.1
Fig. 5 Frequency Response
GY4102A TEST CIRCUITS
All resistors in ohms, all capacitors in microfarads unless otherwise stated
All resistors in ohms, all capacitors in microfarads unless otherwise stated
520 - 21 - 2
5
7A
7B
Gennum Corporation assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement.
Copyright February 1991 Gennum Corporation . Revision Date: January 1993. All rights reserved. Printed in Canada.
t
d (on 2)
td (off 2)
5V
0V
1V
0V
Control
Input
Output
99%
99%
99%
ts (on)
1V
0.5 IRE
0V
99%
0.5 IRE
t s (off)
Settling
Time
t
d (on 1)
1%
Vthresh=1.5V
1%
td (off 1)
5A
5B
Fig. 7 Delay Time
CAUTION
ELECTROSTATIC
SENSITIVE DEVICES
DO NOT OPEN PACKAGES OR HANDLE
EXCEPT AT A STATIC-FREE WORKSTATION
DOCUMENT
IDENTIFICATION
PRODUCT PROPOSAL
This data has been compiled for market investigation purposes
only, and does not constitute an offer for sale.
ADVANCE INFORMATION NOTE
This product is in development phase and specifications are
subject to change without notice. Gennum reserves the right to
remove the product at any time. Listing the product does not
constitute an offer for sale.
PRELIMINARY DATA SHEET
The product is in a preproduction phase and specifications are
subject to change without notice.
DATA SHEET
The product is in production. Gennum reserves the right to make
changes at any time to improve reliability, function or design, in
order to provide the best product possible.
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