The HA456 is the first 8 x 8 video crosspoint switch suitable
for high performance video systems. Its high level of
integration significantly reduces component count, board
space, and cost. The crosspoint switch contains a digitally
controlled matrix of 64 fully buffered switches that connect
eight video input signals to any, or all, matrix outputs. Each
matrix output connects to aninternal, high-speed(200V/µs),
unity gain buffer capable of driving 400Ω and 5pF to ±2V.
For applications requiring gain or increased drive capability,
the HA456 outputs can be connected directly to two
HFA1412 quad, gain of two videobuffers,whicharecapable
of driving 75Ω loads.
This crosspoint’s true high impedance three-state output
capability, makes it feasible to parallel multiple HA456s and
form larger switch matrices.
File Number4153.2
Features
• Fully Buffered Inputs and Outputs (AV= +1)
• Routes Any Input Channel to Any Output Channel
• Switches Standard and High Resolution Video Signals
402D1/ SER OUT Parallel Data Bit input D1 for Parallel Programming Mode. Serial Data Output (MSB of shift
register) for cascading multiple HA456s in serial programming mode. Simply connect
Serial Data Out of one HA456 to Serial Data In of another HA456 to daisy chain multiple
devices.
413D0/SER INParallel Data Bit Input D0 for Parallel Programming Mode. Serial Data Input (input to shift
register) for serial programming mode.
42, 43, 14, 5, 7A2, A1, A0OutputChannelAddress Bits. These inputs select the output being programmed in parallel
programming mode.
44, 2, 4, 7, 9, 11,
13, 15
5, 811, 14DGNDDigital Ground. Connect both DGND pins to AGND.
1016EDGE/LEVEL A user strapped input that defines whether synchronous channel switching is edge or level
12, 23, 3818, 29, 44V+Positive Supply Voltage. Connect all V+ pins together and decouple each pin to AGND
1420SER/PARA user strapped input that defines whether the serial (SER/PAR=1) or parallel
16, 3222, 38V-Negative Supply Voltage. Connect both V- pins together and decouple each pin to AGND
1824WRWRITE Input. In serial mode, data shifts into the shift register (Master Register) LSB from
1925LATCHSynchronous Channel Switch Control Input. If EDGE/LEVEL = 1, data is loaded from the
2026CEChip Enable. When CE = 0 and CE = 1, the WR line is enabled.
2127CEChip Enable. When CE = 0 and CE = 1, the WR line is enabled.
22, 24, 26, 29,
31, 33, 35, 37
25, 27, 3031, 33, 36AGNDAnalog Ground.
3440D3Parallel Data Bit Input D3 when SER/PAR = 0. D3 is unused with serial programming.
3642D2Parallel Data Bit Input D2 when SER/PAR = 0. D2 is unused with serial programming.
6, 8, 10, 13,
15, 17, 19, 21
28, 30, 32, 35,
37, 39, 41, 43
IN0-IN7Analog Video Input Lines.
controlled. With this pin strapped high, the slave register loads from the master register
(thus changing the switch matrix state) on the rising edge of the LATCH signal. If it is
strapped low (level mode), the slave register is transparent while LATCH is low, passing
data directly fromthemasterregistertotheswitchstatedecoders.Strapping EDGE/LEVEL
and LATCH low causes the channel switch to execute on the WR rising edge (not
recommended for serial mode operation).
(Figure 2).
(SER/PAR=0) digital programming interface is being utilized.
(Figure 2).
SER IN on the WR rising edge. In parallel mode, the Master Register loads with D3:0 (iff
D3:0=0000 through 1000), or the appropriate action is taken(iffD3:0=1011 through 1111),
on the WR rising edge (see Table 1).
Master Register to the Slave Register on the rising edge of LATCH. If EDGE/LEVEL = 0,
data is loaded from the Master to the Slave Register while LATCH = 0. In parallel mode,
commands 1011 through 1110 executeasynchronously, on the WR rising edge, regardless
of the state of LATCHorEDGE/LEVEL. Parallelmodecommand 1111 executesa software
“Latch” (see Table 1).
Supply Voltage Range (Typical). . . . . . . . . . . . . . . . . . .±4.5V to ±5.5V
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
1. θJA is measured with the component mounted on an evaluation PC board in free air.
Power Supply Rejection RatioDC, VS= ±4.5V to±5.5V,VIN= 0VAFull4553-dB
Digital Input Current (Note 5)VIN = 0V or 5VAFull--1µA
Digital Input Low VoltageAFull--0.8V
Digital Input High VoltageA252.0--V
AFull2.2--V
SER OUT Logic Low VoltageSerial Mode, IOL = 1.6mAAFull--0.4V
SER OUT Logic High VoltageSerial Mode, IOH = -0.4mAAFull3.0--V
AC CHARACTERISTICS (Note 4)
-3dB Bandwidth (Note 6)CL= 5pF, VIN = 200mV
CL = 5pF, VIN = 1V
CL = 5pF, VIN = 2V
Slew Rate (Note 6)V
OUT
= 4V
P-P
All Hostile Crosstalk (Note 6)10MHz, VIN = 1V
All Hostile Off Isolation (Note 6)10MHz, VIN = 1V
P-P
P-P
, RL=1kΩB25--55-dB
P-P
P-P
P-P
B25-120-MHz
B25-70-MHz
B25-50-MHz
B25-200-V/µs
B25-70-dB
Differential PhaseNTSC or PAL, RL= 1kΩB25-0.05-DEG
NTSC or PAL, RL≥ 10kΩB25-0.05-DEG
Differential GainNTSC or PAL, RL= 1kΩB25-0.05-%
NTSC or PAL, RL≥10kΩB25-0.02-%
TIMING CHARACTERISTICS (See Figure 3 for more information)
Write Pulse Width High (tWH)AFull20--ns
Write Pulse Width Low (tWL)AFull20--ns
Chip-Enable Setup Time to Write (tCS)AFull5--ns
Chip-Enable Hold Time From Write (tCH)AFull5--ns
Data and Address Setup Time to Write (tDS)Parallel ModeAFull20--ns
Serial ModeAFull20--ns
Data and Address Hold Time From Write (tDH)AFull25--ns
Latch Pulse Width (tL)AFull40--ns
Latch Delay From Write (tD)AFull40--ns
LATCH Edge to Output Disabled (t
)Serial ModeBFull-30-ns
OFF
LATCH Edge to Output Enabled (tON)Serial ModeBFull-185-ns
Output Break-Before-Make Delay
(t
ON -tOFF
)
Serial ModeBFull-155-ns
NOTES:
2. For the lowest crosstalk, and the best composite video performance, use RL≥ 1kΩ.
3. Test Level: A. Production Tested; B. Typical or Guaranteed Limit Based on Characterization; C. Design Typical for Information Only.
4. See AC Test Circuits (Figure 6 through Figure 9).
5. Excludes D1/SER OUT which is a bidirectional terminal and thus falls under the higher Output Leakage limit.
6. See Typical Performance Curves for more information.
5
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