LT1342 Linear Technology, LT1342 Datasheet
LT1342
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LT1342 Summary of contents
Page 1
... When driver disable is high the charge pump and drivers turn off. Receivers continue to operate during driver disable. New ESD structures on the chip allow the LT1342 to survive multiple 10kV strikes, eliminating the need for costly TransZorbs The LT1342 is fully compliant with all EIA RS232 specifi- cations and operates in excess of 120kbaud even driving heavy capacitive loads ...
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... – LT1342CG – DRIVER 1 IN LT1342CNW 5 RX1 OUT 24 LT1342CSW 6 23 DRIVER RX2 OUT 8 21 RX3 OUT 9 20 RX4 OUT 10 19 DRIVER RX5 OUT 12 17 GND DRIVER 13 16 DISABLE 14 15 ...
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... Note 7: For receiver delay measurements, C set between the receiver’s input logic threshold and the output transition = 3V. ON/OFF to standard TTL/CMOS logic threshold (t + – 0.8V). Note 8: Data rate operation guaranteed by slew rate, short-circuit current and propagation delay tests. LT1342 MIN TYP MAX UNITS 5 7.3 V – 6.5 – ...
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... DATA RATE (kBAUD) Driver Disable Threshold 3.0 2.5 2.0 1.5 1.0 0.5 0 125 –55 – TEMPERATURE (°C) Driver Leakage in Shutdown 100 10 V OUT –30V OUT 0.1 125 25 50 –55 –25 0 TEMPERATURE (°C) 125 150 LT1342 • TPC03 75 100 125 LT1342 • TPC06 = 30V 125 75 100 LT1342 • TPC09 ...
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... LT1342 Receiver Short-Circuit Current RX1 TO RX4 – RX1 TO RX4 + I SC – RX5 RX5 I SC – 125 –25 100 TEMPERATURE ( C) LT1342 • TPC11 Driver Output Waveforms LT1342 • TPC13 . With multiple CC + – and V pins may be paralleled into + 2V – ...
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... Outputs are in a high impedance U ESD PROTECTIO The RS232 line inputs of the LT1342 have on-chip protec- tion from ESD transients up to 10kV. The protection structures act to divert the static discharge safely to system ground. In order for the ESD protection to function ...
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... DWG # 05-08-1620) 0.037 – 0.045 (0.940 – 1.143) 0.050 (1.270) TYP 0.014 – 0.019 0.004 – 0.012 (0.356 – 0.482) (0.102 – 0.305) TYP LT1342 0.397 – 0.407* (10.07 – 10.33 0.301 – 0.311 (7.65 – 7.90) ...
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... DRIVER 2 IN LOGIC “0” 22 RX2 OUT 21 RX3 OUT MOUSE DATA 20 RX4 OUT 19 DRIVER 3 IN LOGIC “1” 18 RX5 OUT 17 GND 16 DRIVER DISABLE 15 NC LT1342 • TA04 15kV IEC-1000-4-2 ESD Protection 1342fa LT/TP 1098 REV A 2K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1993 0.1 F ...