MAX498/MAX499 19-1143 Rev 0 10/96 Quad/Triple, SPDT, RGB Switches with 250MHz Video Buffer Amplifiers General Description Features The MAX498/MAX499 are high-speed, quad/triple, sin- High Speed: gle-pole/double-throw video switches with on-board 250MHz Small-Signal -3dB Bandwidth closed-loop buffer amplifiers. The buffer amplifiers fea- 135MHz Full-Power -3dB Bandwidth ture +6dB gain (A = 2V/V), 250MHz -3dB band- VCL 70MHz 0.1dB Gain Flatness width, 70MHz 0.1dB gain flatness, and 1250V/m s slew rate. Fast switching time (3ns) and fast settling time 1250V/s Slew Rate (12ns for a 4V step) make these devices excellent 12ns to 0.1% Settling Time choices for a wide variety of video applications. The low differential gain/phase errors (0.03%/0.06) and wide 0.03/0.06% Differential Phase/Gain Error bandwidth make them ideal for both composite-video and RGB applications. The amplifiers are capable of 2pF Input Capacitance delivering 2.5V into back-terminated 50 or 75 3ns Channel-Switching Time cables, and they deliver 2V to a 75 load, allowing multiple cables to be driven from a single output. 120mVp-p Channel-Switching Transient For implementation of large switch arrays, a low-power Three-State Output Allows Large Switch Arrays disable mode places the amplifier outputs in a high- Directly Drives 50 or 75 Back-Terminated impedance state. Channel selection and output Cables enable/disable are controlled by four TTL/CMOS- compatible logic inputs. Each video input is isolated by an AC-ground pin, which minimizes channel-to-channel capacitance and reduces crosstalk to 90dB at 10MHz. Ordering Information The four-channel MAX498 dissipates 390mW (typical) PART TEMP. RANGE PIN-PACKAGE from 5VDC power supplies with all output buffers MAX498CWI 0C to +70C 28 SO enabled. Power consumption is reduced to 130mW with MAX499CWG 0C to +70C 24 SO all buffers disabled. The corresponding dissipation for the three-channel MAX499 is 300mW enabled and 100mW disabled. Applications Pin Configurations Video Switching and Routing TOP VIEW Broadcast-Quality Composite-Video Multiplexing IN1A 24 GND 1 Workstations 23 LE GND 2 Video Editing IN2A 22 3 EN Broadcast and High-Definition TV Systems 21 GND 4 A0 Multimedia Products MAX499 IN3A 5 20 CS Medical Imaging V 19 OUT1 CC 6 V V EE 7 18 CC IN1B 8 17 V EE GND 9 16 OUT2 N.C. IN2B 10 15 OUT3 GND 11 14 IN3B 12 13 N.C. SO MAX498 appears at end of data sheet. Maxim Integrated Products 1 For free samples & the latest literature: Quad/Triple, SPDT, RGB Switches with 250MHz Video Buffer Amplifiers ABSOLUTE MAXIMUM RATINGS Supply Voltage (V to V )................................................+12V Continuous Power Dissipation (T = +70C) CC EE A Voltage on IN to GND ..................(V - 0.3V) to (V + 0.3V) 24-Pin SO (derate 11.76mW/C above +70C).............941mW EE CC Voltage on Digital Inputs 28-Pin SO (derate 12.5mW/C above +70C)......................1W (LE, EN, A0, CS).........................................-0.3V to (V + 0.3V) Operating Temperature Range .................................0C to +70 CC Voltage on OUT (disabled) ..................................................4V Storage Temperature Range .............................-65C to +150C Output Short-Circuit Duration Lead Temperature (soldering, 10sec) .............................+300C to -4V OUT +4V ..................................................Continuous 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, V = 0V, R = 150, LE = EN = CS = 0V, T = 0C to +70C, unless otherwise noted. Typical values are at CC EE IN L A T = +25C.) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Voltage Range V 1.25 1.70 V IN R = 150, -1.25V V +1.25V 1.985 2.030 L IN Voltage Gain A V/V V R = 75, -1.0V V +1.0V 1.965 2.030 L IN Input Offset Voltage V 2 9 mV OS Input Offset Voltage Drift TCV 50 V/C OS Input Bias Current I 1 7 A B Input Resistance R -1.25V V +1.25V 200 700 k IN IN Input Capacitance C Channel on or off 2 pF IN Output Short-Circuit Current I -3.5V OUT +3.5V (Note 1) 120 mA OUT(SC) Output Current I -2.0V V +2.0V, R = 75W 27 40 mA OUT OUT L On Output Resistance R 0.15 OUT On Output Impedance f = 10MHz 3.0 Off Output Resistance -2.50V V +2.50V 1.0 1.2 k OUT Operating Supply-Voltage Range 4.50 5.50 V Positive Power-Supply Rejection PSR+ 4.50V V 5.50V, V = -5.0V 55 72 dB CC EE Negative Power-Supply PSR- -5.50V V -4.5V, VCC = +5.0V 55 72 dB EE Rejection Logic Low Voltage V 0.8 V INLL Logic High Voltage V 2 V INLH Logic Input Current I 0V V VCC -10 130 A INL INL MAX498 40 52 EN = 0 MAX499 31 41 Positive Supply Current I mA CC MAX498 14 17 EN = 1 MAX499 11 14 MAX498 38 50 EN = 0 MAX499 29 39 Negative Supply Current I mA EE MAX498 12 15 EN = 1 MAX499 912 Note 1: Limited by package power dissipation. 2 MAX498/MAX499