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September 1998
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HA4244
File Number
4078.2
480MHz, 1 x 1 Video Crosspoint
Switch with Synchronous Enable
The HA4244 is a very wide bandwidth 1 x 1 crosspoint switch
ideal for professional video switching, HDTV, computer
monitor routing, and other high performance applications. The
circuit features very low power dissipation, excellent
differential gain and phase, high off isolation, symmetric slew
rates, fast switching, and a latched enable signal. When
disabled, the output is switched to a high impedance state,
making the HA4244 ideal for routing matrix equipment.
The latched enable input allows for synchronized channel
switching. When CLK is low the master control latch loads the
next EN, while the closed slave control latch maintains the
crosspoint in its current state. CLK switching high closes the
master latch, loads the now open slave latch, and enables or
disables the HA4244 according to the current state of the EN
input.
This crosspoint鈥檚 design ensures that it powers up in the
disabled state to eliminate bus contention concerns, and to
minimize supply current draw at power up.
For applications requiring an asynchronous crosspoint
switch, please refer to the HA4201 and HA4600 data sheets.
Features
鈥?Low Power Dissipation. . . . . . . . . . . . . . . . . . . . . 105mW
鈥?Symmetrical Slew Rates . . . . . . . . . . . . . . . . . . 1700V/碌s
鈥?0.1dB Gain Flatness. . . . . . . . . . . . . . . . . . . . . . . 250MHz
鈥?-3dB Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . 480MHz
鈥?Off Isolation (100MHz) . . . . . . . . . . . . . . . . . . . . . . . 85dB
鈥?Differential Gain and Phase . . . . . . . 0.01%/0.01 Degrees
鈥?High ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . >1800V
鈥?TTL Compatible Control Signals
鈥?Latched Enable Input for Synchronous Switching
鈥?Powers-Up in Disabled State; Avoids Bus Contention
Applications
鈥?Professional Video Switching and Routing
鈥?Video Multiplexers
鈥?Computer Graphics
鈥?RF Switching and Routing
鈥?PCM Data Routing
Functional Diagram
IN
EN
D
L
Q
C
D
L
Q
C
OUT
Part Number Information
PART NUMBER
(BRAND)
HA4244CB
(H4244C)
TEMP.
RANGE (
o
C)
0 to 70
PACKAGE
8 Ld SOIC
PKG.
NO.
M8.15
Pinout
CLK
Timing Diagram
CLK
EN
V-
EN
V+
DIS
ENABLED
DIS
OUT
1
2
3
4
HA4244
(SOIC)
TOP VIEW
8 GND
7 IN
6 NC
5 CLK
OUT
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright 漏 Intersil Americas Inc. 2002. All Rights Reserved
INTERSIL
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