SP304 SIPEX [Sipex Corporation], SP304 Datasheet
SP304
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SP304 Summary of contents
Page 1
... It is pin-for-pin compatible with the SP302, and in any configuration, fully meets the requirements of the EIA RS-232D and RS-422 data communication standards. A loopback test mode is provided.The SP304 is available in 24-pin single width plastic DIP, and 28-pin SOIC packages for commercial and industrial temperature range operation. ...
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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 Slew ...
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... This is an absolute maximum rating; normal operating levels are V 5. Outputs unloaded; Inputs tied to GND; T Typical SP304 current drains under full load are: 18mA (+12V), 10mA (-12V) and 7mA (+5V) in RS-232 mode only; 5mA (+12V), 7mA (-12V) and 56mA (+5V) in RS-422 mode only; ...
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... USING THE SP304 POWER SUPPLIES The SP304 requires 12V and +5V for full RS-232 and RS-422 operation. The 12V sup- plies set up the RS-232 9V voltage swings, and the +5V is used for the internal logic that for- mats the communications mode and controls the loopback function ...
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... EE device, the impedance from a transmitter output to ground must be greater than 300 . This can be easily achieved as shown in Figure 1a, where an external transistor is used as a switch to isolate an SP304 from ground in the power off V CC condition. With V switch is on, connecting ground (GND) for the device to the circuit ground power-off ...
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... RS-232 signal to an input that is configured for RS-422. 82 load. Figure 2 shows a typical circuit for the SP304. In this case the SP304 is shown configured for one (1) duplex RS-422 and two (2) duplex RS-232 communication paths. CONFIGURING THE SP304 ...
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... FIGURE 3: SP304 CONTROL LOGIC CONFIGURATION SELECTION LOGIC VALUE SELECT A: 0 SELECT B: 0 RIA ROA NON– 2 LOOPBACK RIA ROA ( TOA TIA 1 1 TOA TIA 2 2 RIB ROB 2 RIB ROB 1 TOB TIB 1 1 TOB TIB 2 2 LOOPBACK RIA ROA 2 (LB=0) RIA ROA ...
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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 RECEIVERS RIA 1 ROA 1 RIA 2 ROA 2 RIB 1 ROB 1 RIB ...
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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. Note however that functions are acti- vated on the opposite channels. ...
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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 test loops can be SP304 CONFIGURATIONS IN LOOPBACK MODE Two -Channel Full Duplex RS-232 ...
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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 & One-Channel Full Duplex RS-422 Opposite Drivers TIB TOB ...
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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 Package ...