MAX4456 Maxim, MAX4456 Datasheet
MAX4456
Available stocks
Related parts for MAX4456
MAX4456 Summary of contents
Page 1
... 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 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 ...
Page 2
... 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, 10s) .................................+300° ...
Page 3
AC ELECTRICAL CHARACTERISTICS (V+ = +5V -5V +5V (internal load resistors on), V LOAD 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 ...
Page 4
... MAX4456 NAME DIP PLCC D1/ Parallel Data Bit D1 when SER/PAR = GND. Serial out SER OUT put for cascading multiple parts when SER/PAR = V Parallel Data Bit D0 when SER/PAR = GND. Serial 2 3 D0/SER IN input when SER/PAR = V ...
Page 5
... Low-Cost 4x4, 8x4, 8x8 Video Crosspoint Switches MAX4456 NAME DIP PLCC Active-Low Chip Enable enabled when CE = GND and Active-High Chip Enable enabled when CE = GND and ...
Page 6
... Low-Cost 4x4, 8x4, 8x8 Video Crosspoint Switches Detailed Description The MAX4456 video crosspoint switch consists of 64 T-switches in an 8x8 grid (Figure 1). The eight matrix outputs are followed by eight wideband buffers opti- mized for driving 400Ω and 20pF loads. The MAX4359’s core is a 4x4 switch matrix with each of its outputs followed by a wideband buffer ...
Page 7
... Connect the buffer selected by A2–A0 (MAX4456) or A1–A0 (MAX4359/MAX4360) to DGND. Note, if the buffer output is on, its output is its offset voltage. Shut off the buffer selected by A2–A0 (MAX4456) or A1–A0 (MAX4359/MAX4360) and retain 2nd-rank registers contents. Turn on the buffer selected by A2–A0 (MAX4456) or A1–A0 (MAX4359/MAX4360, and restore the previously connected channel ...
Page 8
... Then, a single LATCH pulse is used to reconfig- ure all channels simultaneously. The short BASIC program in Figure 3 loads programming data into the MAX4456 from any IBM PC or compatible. It uses the computer’s “LPT1” output to interface to the cir- cuit, then automatically finds the address for LPT1 and displays a table of valid input values to be used ...
Page 9
... D1/SER OUT Figure 2. MAX4456 (plastic DIP) Typical Application Circuit _______________________________________________________________________________________ Low-Cost 4x4, 8x4, 8x8 Video Crosspoint Switches 39 OUT0 200Ω 37 OUT1 200Ω 35 OUT2 200Ω 33 OUT3 31 OUT4 29 OUT5 27 OUT6 25 OUT7 ...
Page 10
... Low-Cost 4x4, 8x4, 8x8 Video Crosspoint Switches Figure 3. BASIC Program for Loading Data into the MAX4456 from a PC Using Figure 2’s Circuit A0–A2 D0–D3 WR LATCH Figure 4. Write Timing for Serial- and Parallel-Interface Modes 10 ______________________________________________________________________________________ VALID DATA N-1 Timing Diagrams VALID DATA ...
Page 11
NOTE: SEE FIGURE 4 FOR WR AND LATCH TIMING. WR LATCH 1st-RANK REGISTER DATA 2nd-RANK REGISTER DATA (EDGE/LEVEL = GND) 2nd-RANK REGISTER DATA (EDGE/LEVEL = Figure 5. Parallel-Interface Mode Format (SER/ NOTES: SEE TABLE 2 FOR INPUT ...
Page 12
... Note 4: Drive the selected input with V Note 5: Program each numbered input to connect to the same numbered output (IN0 to OUT0, IN1 to OUT1, etc., for the MAX4456; also IN4 to OUT0, IN5 to OUT1, etc., for the MAX4360.) See Table for programming codes. Note 6: Turn off all output buffers (Table 1 or 2). ...
Page 13
... N.C. N. N.C. N. N.C. N. LATCH SER/PAR N. SSOP IN1 8 LOAD 9 IN2 10 DGND 11 MAX4456 N.C. 12 IN3 13 DGND 14 IN4 15 EDGE/LEVEL 16 IN5 PLCC Pin Configurations D1/SER OUT D0/SER OUT0 IN0 4 OUT1 MAX4360 ...
Page 14
... Low-Cost 4x4, 8x4, 8x8 Video Crosspoint Switches (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages TOP VIEW FRONT VIEW 14 ______________________________________________________________________________________ DIM Package Information ...
Page 15
... For the latest package outline information go to www.maxim-ic.com/packages TOP VIEW FRONT VIEW ______________________________________________________________________________________ Low-Cost 4x4, 8x4, 8x8 Video Crosspoint Switches Package Information (continued 0∞ ...
Page 16
... Low-Cost 4x4, 8x4, 8x8 Video Crosspoint Switches (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages NOTES DOES NOT INCLUDE MOLD FLASH. ...
Page 17
... Pages changed at Rev 14–17 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. ...