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SN55188J Datasheet(PDF) 7 Page - Texas Instruments |
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SN55188J Datasheet(HTML) 7 Page - Texas Instruments |
7 / 15 page MC1488, SN55188, SN75188 QUADRUPLE LINE DRIVERS SLLS094C − SEPTEMBER 1983 − REVISED MAY 2004 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 THERMAL INFORMATION† MAXIMUM SUPPLY VOLTAGE vs FREE-AIR TEMPERATURE RL ≥ 3 kΩ (from each output to GND) 14 12 10 8 6 4 2 100 75 50 25 0 −25 −50 0 125 16 TA − Free-Air Temperature − °C −75 Figure 6 † Data for temperatures below 0°C and above 70°C are applicable to the SN55188 circuit only. APPLICATION INFORMATION Diodes placed in series with the VCC+ and VCC − leads protect the SN55188/SN75188 in the fault condition in which the device outputs are shorted to ±15 V, and the power supplies are at low voltage and provide low-impedance paths to ground. VCC + VCC − ±15 V Output VCC + VCC − ’188 ’188 10 k Ω 1 k Ω − 10 V to 0 V Output to MOS or SN75188 1/4 SN55188 − 0.7 V to 10 V Output to HNIL 1/4 SN55188 or SN75188 − 0.7 V to 5.7 V Output to DTL 5 V 1/4 SN55188 or SN75188 or SN75188 1/4 SN55188 − 0.7 V to 3.7 V Output to RTL 3 V − 12 V VCC + = 12 V VCC − = − 12 V Figure 7. Logic Translator Applications Figure 8. Power-Supply Protection to Meet Power-Off Fault Conditions of ANSI TIA / EIA-232-E |
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