GX4201 Datasheet, PDF (1/6 Pages) Gennum Corporation – Wideband, Monolithic 1x1 Video Crosspoint Switch

FEATURES
• -3 dB bandwidth, 300 MHz with C = 0 pF
L
• off isolation at 100 MHz, 80 dB
• differential phase and gain at 4.43 MHz, 0.01° &
0.02%
• 800 µW disabled power consumption
• input signal levels from -2 V to +3 V
• logic input compatible with TTL and 5 V CMOS
• open collector TALLY output
FUNCTIONAL BLOCK DIAGRAM
TALLY
IN
X
OUT
EN
PATENT PENDING
TRUTH TABLE
EN
OUT
0 HIGH Z
1
IN
TALLY
OFF
ON
ABSOLUTE MAXIMUM RATINGS
Parameter
Value
Supply Voltage
±7.5 V
Operating Temperature Range
0° C ≤ T_A ≤ 70° C
Storage Temperature Range
-65° C ≤ T_S ≤ 150° C
Lead Temperature (Soldering, 10 Sec)
260° C
Analog Input Voltage
Logic Input Voltage
Output Load Current
-5.5 V ≤ V_IN ≤ 5.5 V
-0.5 V ≤ V_L ≤ 5.5 V
12mA
High Level TALLY Output Current
2 mA
GX4201 Wideband, Monolithic 1x1
Video Crosspoint Switch
DATA SHEET
CIRCUIT DESCRIPTION
The GX4201 is a wideband 1x1 video crosspoint implemented
in bipolar monolithic technology. The device is characterized
by excellent differential gain and phase in the enabled
state, and very high off-isolation in the disabled state. The
fully buffered unilateral signal path ensures negligible output
to input feedback while delivering minimal output switching
transients through make-before-break switching.
For use in NxM routing matrices, the device features a very
high, nearly constant input impedance, coupled with very
high output impedance in the disabled state. This allows
multiple GX4201's to be paralleled at the input and output
without additional circuitry. An open collector PNP to V_CC
TALLY output provides indication of crosspoint selection.
To maximize system bandwidth, an external current source
is used to bias the output device of the crosspoint. One
external current source is required per output bus. For less
demanding applications, a load resistor can be used in
place of the output current source, causing a slight increase
in differential phase. Non-additive mixing will occur on the
output bus if more than one paralleled GX4201 is enabled
at a time.
The GX4201 is one of a series of wideband video crosspoints
utilizing Gennum's proprietary LSI process.
APPLICATIONS
• very high quality video switching
• HDTV
• computer graphics
• RF switching/routing
• PCM/data routing
PIN CONNECTIONS
TOP VIEW
EN
1
V _EE
V _CC
0UT
4
8
GND
IN
GND
5 _TALLY
8 PIN SOIC
EN
V_EE
V_CC
OUT
PIN 1
8
GND
IN
GND
4
5
TALLY
8 PIN DIP
Document No. 510 - 74 - 5
GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 tel. [phone] fax: [phone]
Japan Branch: B-201 Miyamae Village, 2-10-42, Miyamae, Suginami-ku, Tokyo 168, Japan tel. [phone] fax [phone]