Disabled Output Impedance: 10M鈩?/div>
50mV Switching Transient
Channel Separation at 10MHz: > 90dB
Differential Gain: 0.02%
Differential Phase: 0.02擄
Wide Supply Range:
鹵5V
to
鹵15V
Output Short-Circuit Protected
Push-Pull Output
The LT1203 is a wideband 2-input video multiplexer
designed for pixel switching and broadcast quality rout-
ing. The LT1205 is a dual version that is configured as a
4-input, 2-output multiplexer.
These multiplexers act as SPDT video switches with 10ns
transition times at toggle rates up to 30MHz. The 鈥?3dB
bandwidth is 150MHz and 0.1dB gain flatness is 30MHz.
Many parts can be tied together at their outputs by using
the enable feature which reduces the power dissipation
and raises the output impedance to 10M鈩? Output capaci-
tance when disabled is only 3pF and the LT1203 peaks less
than 3dB into a 50pF load. Channel crosstalk and disable
isolation are greater than 90dB up to 10MHz. An on-chip
buffer interfaces to fast TTL or CMOS logic. Switching
transients are only 50mV with a 25ns duration. The
LT1203 and LT1205 outputs are protected against shorts
to ground.
The LT1203/LT1205 are manufactured using Linear
Technology鈥檚 proprietary complementary bipolar process.
The LT1203 is available in both the 8-lead PDIP and SO
package while the LT1205 is available in the 16-lead
narrow body SO package.
APPLICATI
s
s
s
s
s
s
s
S
Broadcast Quality Video Multiplexing
Picture-in-Picture Switching
HDTV
Computer Graphics
Title Generation
Video Crosspoint Matrices
Video Routers
TYPICAL APPLICATI
High Speed RGB MUX
CHANNEL SELECT
RED 1
RED 2
V
鈥?/div>
Large-Signal Response
+1
+1
LT1205
+1
+1
V
+
EN
LOGIC
V
+
EN
LOGIC
V
OUT
GREEN
V
OUT
RED
GREEN 1
GREEN 2
V
鈥?/div>
BLUE 1
BLUE 2
V
鈥?/div>
+1
LT1203
+1
V
+
EN
LOGIC
LT1203 鈥?TA01
V
OUT
BLUE
U
UO
UO
1
next