sp304ct Exar Corporation, sp304ct Datasheet
sp304ct
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sp304ct Summary of contents
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Corporation SIGNAL PROCESSING EXCELLENCE RS-232/RS-422 Line Drivers/Receivers RS-232 and RS-422 on One Chip Multiple Drivers and Receivers Software-selectable Modes Loopback for Self-Testing Short-circuit Protected Single-width 24-pin DIP and 28–pin SOIC Packages DESCRIPTION… The SP304 is an enhanced-performance version of the ...
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SPECIFICATIONS ( and nominal supply voltages unless otherwise noted) MIN A MAX PARAMETER MIN. RS-232 DRIVER TTL Input Level 2.0 IH High Level Output +5.0 Low Level Output Short Circuit Current Loopback Output Voltage ...
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Notes Loopback mode 2. Only one output drive pin per package will be shorted at any time 3. From 10% to 90% of steady-state 4. This is an absolute maximum rating; normal operating levels are V 5. Outputs ...
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PIN ASSIGNMENTS V (+12V RIA 2 23 ROA 2 RIA 3 22 ROA 1 TOA 4 21 TIA 2 TOA 5 20 TIA 1 SELECT SELECT N.C. TOB 8 ...
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SP304 3.3k Ω V GND EE 3.3k Ω 2N2222 Single SP304 b) Multiple SP304 SP304 3.3kΩ GND ...
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Short circuit protection for the RS-422 operat- ing mode is the same as in the RS-232 mode. The driver outputs can be shorted to ground for an infinite duration, with a maximum current of ...
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FIGURE 3: SP304 CONTROL LOGIC CONFIGURATION SELECTION LOGIC VALUE SELECT SELECT B: RIA ROA NON– LOOPBACK RIA ROA ( TOA TIA 1 1 TOA TIA 2 2 RIB ROB 2 2 ...
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FIGURE 4: SP304 CONFIGURATIONS Four-Channel Duplex RS-232 Four independent channels of RS-232 line driver and four channels of RS-232 receiver. TIA TOA 1 1 TIA TOA 2 2 TIB TOB 1 1 TIB TOB 2 2 RS-232 LINE DRIVERS RS-232 ...
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FIGURE 5: SP304 CONFIGURATIONS Two-Channel Duplex RS-232 & One-Channel Duplex RS-422 Opposite Drivers Two RS-232 line drivers and receivers, and a single RS-422 line driver and receiver. At first glance, this is the same configuration as that in Figure 4. ...
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LOOPBACK The SP304 has a function called loopback, which is essentially a chip self-test. However, by connecting system test loops with the inputs and outputs of the SP304, a system-level diagnostic can be run on power- command. The ...
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V to ground. Receiver EE outputs are left active for signal verification. SP304 CONFIGURATIONS IN LOOPBACK MODE One-Channel Full Duplex RS-232 ...
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... Max # of Duplex Channels Model RS-232 RS-422 SP304CS .................. 4 ...................... 2 .................................... 0˚C to 70˚C ........................ 24-pin Single-Width Plastic DIP SP304CT .................. 4 ...................... 2 .................................... 0˚C to 70˚C ....................................................... 28-pin SOIC SP304ES .................. 4 ...................... 2 .................................. -40˚C to 85˚C ....................... 24-pin Single-Width Plastic DIP SP304ET .................. 4 ...................... 2 .................................. -40˚C to 85˚C ...................................................... 28-pin SOIC 88 ORDERING INFORMATION Temperature ...