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PDF MAX4359EWG Data sheet ( Hoja de datos )
| Número de pieza | MAX4359EWG | |
| Descripción | Low-Cost 4x4 / 8x4 / 8x8 Video Crosspoint Switches | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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19-1389; Rev 1; 12/99
Low-Cost 4x4, 8x4, 8x8
Video Crosspoint Switches
General Description
Features
The MAX4359/MAX4360/MAX4456 low-cost video cross-
point switches are designed to reduce component count,
board space, design time, and system cost. Each con-
tains a matrix of T-switches that connect any of their four
(MAX4359) or eight (MAX4360/MAX4456) video inputs to
any of their buffered outputs, in any combination. Each
matrix output is buffered by an internal, high-speed
(250V/µs), unity-gain amplifier that is capable of driving
400Ω and 20pF at 2.6Vp-p. For applications requiring
increased drive capability, buffer the MAX4359/
MAX4360/MAX4456 outputs with the MAX497 quad,
gain-of-two video line driver.
The MAX4456 has a digitally controlled 8x8 switch matrix
and is a low-cost pin-for-pin compatible alternative to the
popular MAX456. The MAX4359/MAX4360 are similar to
the MAX4456, with the 8x8 switch matrix replaced by a
4x4 (MAX4359) or an 8x4 (MAX4360) switch matrix.
o Eight (MAX4456) or Four (MAX4359/MAX4360)
Internal Buffers
250V/µs Slew Rate
Three-State Output Capability
Power-Saving Disable Feature
65MHz -3dB Bandwidth
o Routes Any Input Channel to Any Output Channel
o Serial or Parallel Digital Interface
o Expandable for Larger Switch Matrices
o 80dB All-Channel Off-Isolation at 5MHz
o 70dB Single-Channel Crosstalk
o Straight-Through Pinouts Simplify Layout
o Low-Cost Pin-Compatible Alternative to
MAX456 (MAX4456)
Three-state output capability and internal, programmable
active loads make it feasible to parallel multiple devices
to form larger switch arrays. The inputs and outputs are
on opposite sides, and a quiet power supply or digital
input line separates each channel, which reduces
crosstalk to -70dB at 5MHz. For applications demanding
better DC specifications, see the MAX456 8x8 video
crosspoint switch.
PART
MAX4359EAX
MAX4359EWG
MAX4360EAX
MAX4456CPL
Ordering Information
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
PIN-PACKAGE
36 SSOP
24 SO
36 SSOP
40 Plastic DIP
________________________ Applications MAX4456CQH
0°C to +70°C
44 PLCC
High-Speed Signal
Routing
Video-On-Demand
Systems
Video Test Equipment
Video Conferencing
Security Systems
MAX4456EPL
-40°C to +85°C
40 Plastic DIP
MAX4456EQH
-40°C to +85°C
44 PLCC
Pin Configurations appear at end of data sheet.
_________________________________________________ Typical Application Circuits
8 INPUT CHANNELS
WR
LATCH
MAX4456
OUTPUT
SELECT
INPUT
SELECT
OR
SERIAL
I/O
A2
A1
A0
8x8
T-SWITCH
MATRIX
D3
D2
D1/SER OUT
D0/SER IN
MAX497
AV = +2
75Ω Z0 = 75Ω
75Ω
AV = +2
MAX497
OUTPUT
SELECT
INPUT
SELECT
OR
SERIAL
I/O
4 INPUT CHANNELS
(8 INPUT CHANNELS)
(MAX4360)
WR
LATCH
MAX4359
(MAX4360)
A1
A0
4x4
(8x4)
T-SWITCH
D3 MATRIX
D2
D1/SER OUT
D0/SER IN
MAX497
AV = +2
75Ω Z0 = 75Ω
75Ω
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
1 page  
Low-Cost 4x4, 8x4, 8x8
Video Crosspoint Switches
Pin Description (continued)
MAX4359
SO SSOP
PIN
MAX4360
SSOP
———
MAX4456
DIP PLCC
23 26
16 27 27 24 27
17, 19, 21,
23
28, 31, 33,
35
28, 31, 33,
35
25, 27, 29,
31, 33, 35,
37, 39
28, 30, 32,
35, 37, 39,
41, 43
18 29 15, 29 28, 30, 32 31, 33, 36
20 32 32 36 40
22 34 34 38 42
24 36 13, 36 16, 26, 40 18, 29, 44
NAME
CE
CE
OUT_
AGND
D3
D2
V+
FUNCTION
Active-Low Chip Enable. WR is enabled when
CE = GND and CE = VCC. WR is disabled when
CE = VCC and CE = GND.
Active-High Chip Enable. WR is enabled when
CE = GND and CE = VCC. WR is disabled when
CE = VCC and CE = GND.
Buffer Outputs. Buffer inputs are internally grounded with
a 1000 or 1001 command from the D3–D0 lines.
Analog Ground. AGND must be at 0.0V, since the gain-
setting resistors of the buffers are connected to these
pins.
Parallel Data Bit when SER/PAR = GND. When
D3 = GND, D0–D2 specify the input channel to be con-
nected to specified buffer. When D3 = VCC, D0–D2
specify control codes. D3 is not used in serial mode
(SER/PAR = VCC).
Parallel Data Bit D2 when SER/PAR = GND. Not used
when SER/PAR = VCC.
Positive Supply. All V+ pins must be connected to each
other and bypassed to AGND separately (Figure 2).
_______________________________________________________________________________________ 5
5 Page 
Low-Cost 4x4, 8x4, 8x8
Video Crosspoint Switches
Timing Diagrams (continued)
NOTE: SEE FIGURE 4 FOR WR AND LATCH TIMING.
DATA (N)
DATA (N + 1)
DATA (N + 2)
WR
LATCH
1st-RANK REGISTER DATA
2nd-RANK REGISTER DATA
(EDGE/LEVEL = GND)
2nd-RANK REGISTER DATA
(EDGE/LEVEL = VCC)
DATA (N)
DATA (N + 1)
DATA (N + 2)
DATA (N)
DATA (N + 1)
DATA (N)
DATA (N + 1)
Figure 5. Parallel-Interface Mode Format (SER/PAR = GND)
NOTES: SEE TABLE 2 FOR INPUT DATA.
SEE FIGURE 4 FOR WR AND LATCH TIMING.
INPUT DATA FOR OUT0
INPUT DATA FOR OUT1 TO OUT6
INPUT DATA FOR OUT7
0D3 0D2 0D1 0D0 1D3 1D2
7D3 7D2 7D1 7D0
WR
LATCH
2nd-RANK REGISTER DATA
(EDGE/LEVEL = GND)
2nd-RANK REGISTER DATA
(EDGE/LEVEL = VCC)
Figure 6. Serial-Mode Interface Format (SER/PAR = VCC)
DATA VALID
DATA VALID
______________________________________________________________________________________ 11
11 Page | ||
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