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Part: MAX4456C
Category:
Analog & Mixed-Signal Processing
Description: Low-cost 4x4, 8x4, 8x8 Video Crosspoint Switches
Company: Maxim Integrated Products
Datasheet: Download MAX4456C datasheet File size : 242 kB
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Datasheet text preview:
19-1389; Rev 1; 12/99
Low- Cost 4x4, 8x4, 8x8 Video Crosspoint Switches
General Description
The MAX4359/MAX4360/MAX4456 low-cost video crosspoint switches are designed to reduce component count, board space, design time, and system cost. Each contains 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 400 and 20pF at 2.6Vp-p. For applications requiring i n c r e a s e d 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. 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 i n p u t line separates each channel, which reduces crosstalk to -70dB at 5MHz. For applications demanding better DC specifications, see the MAX456 8x8 video crosspoint switch.
Features
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)
MAX4359/MAX4360/MAX4456
Ordering Information
PART MAX4359EAX MAX4359EWG MAX4360EAX MAX4456CPL MAX4456CQH MAX4456EPL MAX4456EQH TEMP. RANGE -40°C to +85°C -40°C to +85°C -40°C to +85°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C PIN-PACKAGE 36 SSOP 24 SO 36 SSOP 40 Plastic DIP 44 PLCC 40 Plastic DIP 44 PLCC
________________________ Applications
High-Speed Signal Routing Video-On-Demand Systems
8 INPUT CHANNELS MAX497 AV = +2 WR LATCH Z0 = 75
Video Test Equipment Video Conferencing Security Systems
Pin Configurations appear at end of data sheet.
_________________________________________________ Typical Application Circuits
4 INPUT CHANNELS (8 INPUT CHANNELS) (MAX4360) MAX497 AV = +2 75 WR LATCH
75
75
Z0 = 75
MAX4456
A2 A1 A0 8x8 T-SWITCH MATRIX D3 D2 D1/SER OUT D0/SER IN AV = +2 MAX497
OUTPUT SELECT
MAX4359 (MAX4360)
OUTPUT SELECT A1 A0 4x4 (8x4) T-SWITCH MATRIX
75
INPUT SELECT OR SERIAL I/O
INPUT SELECT OR SERIAL I/O
D3 D2 D1/SER OUT D0/SER IN
________________________________________________________________ Maxim Integrated Products
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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.
Low- Cost 4x4, 8x4, 8x8 Video Crosspoint Switches MAX4359/MAX4360/MAX4456
ABSOLUTE MAXIMUM RATINGS
Total Supply Voltage (V+ to V-) ..........+12V Positive Supply Voltage (V+) Referred to AGND .......-0.3V to +12V Negative Supply Voltage (V-) Referred to AGND ......-12V to +0.3V DGND to AGND .........±0.3V Buffer Short Circuit to Ground when Not Exceeding Package Power Dissipation ....Indefinite Analog Input Voltage ....(V+ + 0.3V) to (V- - 0.3V) Digital Input Voltage .....(V+ + 0.3V) to (V- - 0.3V) Input Current, Power On or Off Digital Inputs........±20mA Analog Inputs ......±50mA Continuous Power Dissipation (TA = +70°C) 36-Pin SSOP (derate 11.8mW/°C above +70°C) ..941mW 24-Pin SO (derate 11.8mW/°C above +70°C).......941mW 40-Pin Plastic DIP (derate 11.3mW/°C above +70°C)....889mW 44-Pin PLCC (derate 13.3mW/°C above +70°C) .......1066mW Operating Temperature Ranges MAX4456C _ _ ....0°C to +70°C MAX4_ _ _E_ _ .......-40°C to +85°C Junction Temperature ......+150°C Storage Temperature Range .....-65°C to +150°C Lead Temperature (soldering, 10sec) .....+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(V+ = +5V, V- = -5V, VLOAD = +5V (internal load resistors on), VIN_ = VAGND = VDGND = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER Operating Supply Voltage Input Voltage Range Voltage Gain Buffer Offset Voltage Offset Voltage Drift MAX4359/MAX4360 Supply Current, All Buffers On (no external load) MAX4456 Supply Current, All Buffers Off Power-Supply Rejection Ratio Analog Input Current Output Leakage Current Internal Amplifier Load Resistor Buffer Output Voltage Swing Digital Input Current Output Impedance at DC Input Logic Low Threshold Input Logic High Threshold SER OUT Output Logic Low/High Serial mode, VSER/PAR = 5V IOL = 0.4mA IOH = -0.4mA 4 2.4 0.4 10 0.8 Internal load resistors off, all buffers off VLOAD = 5V TA = +25°C TA = TMIN to TMAX 250 200 ±1.3 ±1 400 ±4.5V to ±5.5V 50 TA = +25°C TA = TMIN to TMAX TA = +25°C TA = TMIN to TMAX 1.6 64 ±0.1 ±100 ±100 600 765 39 CONDITIONS Inferred from PSRR test Inferred from swing test Internal load resistors on, no external load, VIN = 0 to 1V TA = +25°C TA = TMIN to TMAX 20 20 32 37 50 65 5 mA dB nA nA V µA V V V mA TA = +25°C TA = TMIN to TMAX MIN ±4.5 -1.3 0.99 0.98 1.0 1.0 ±1 TYP MAX ±5.5 1.3 1.01 1.02 ±15 ±20 UNITS V V V/V mV µV/°C
Internal load resistors on, no external load
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Low- Cost 4x4, 8x4, 8x8 Video Crosspoint Switches
AC ELECTRICAL CHARACTERISTICS
(V+ = +5V, V- = -5V, VLOAD = +5V (internal load resistors on), VAGND = VDGND = 0, TA = +25°C, unless otherwise noted.) PARAMETER DYNAMIC SPECIFICATIONS X Output-Buffer Slew Rate Single-Channel Crosstalk All-Hostile Crosstalk All-Channel Off-Isolation -3dB Bandwidth Small-Signal -3dB Bandwidth 0.1dB Bandwidth Differential Phase Error Differential Gain Error Input Noise Input Capacitance Buffer Input Capacitance Output Capacitance Internal load resistors on, 10pF load 5MHz, VIN = 2Vp-p (Note 1) 5MHz, VIN = 2Vp-p (Notes 1, 2) 5MHz, VIN = 2Vp-p (Note 1) 10pF load, VIN = 2Vp-p (Note 1) 10pF load, VIN = 100mVp-p (Note 1) 10pF load, VIN = 100mVp-p (Note 1) (Note 3) (Note 3) DC to 40MHz All buffer inputs grounded Additional capacitance for each output buffer connected to channel input Output buffer off 250 70 57 80 35 65 4 1.0 0.5 0.3 6 2 7 V/µs dB dB dB MHz MHz MHz degrees % mVRMS pF pF pF CONDITIONS MIN TYP MAX UNITS
MAX4359/MAX4360/MAX4456
SWITCHING CHARACTERISTICS
(Figure 4, V+ = +5V, V- = -5V, VLOAD = +5V (internal load resistors on), VIN_ = VAGND = VDGND = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 4) PARAMETER Chip-Enable to Write Setup Write Pulse Width High Write Pulse Width Low Data Setup Data Hold Latch Pulse Width Latch Delay Switch Break-Before-Make Delay LATCH Edge to Switch Off LATCH Edge to Switch On SYMBOL tCE tWH tWL tDS tDH tL tD tON - tOFF tOFF tON LATCH on Parallel mode Serial mode CONDITIONS MIN 0 80 80 240 160 0 80 80 15 35 50 TYP MAX UNITS ns ns ns ns ns ns ns ns ns ns
Note 1: See Dynamic Test Circuits section. Note 2: 3dB typical crosstalk improvement when RS = 0. Note 3: Input test signal: 3.58MHz sine wave of amplitude 40IRE superimposed on a linear ramp (0 to 100IRE). IRE is a unit of video-signal amplitude developed by the International Radio Engineers. 140IRE = 1.0V. Note 4: Guaranteed by design.
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