LT1781CN Linear Technology, LT1781CN Datasheet
LT1781CN
Specifications of LT1781CN
Available stocks
Related parts for LT1781CN
LT1781CN Summary of contents
Page 1
... ESD protection. The LT1781 is available in 16-pin DIP,SO and SW pack- ages. The LT1780 is supplied in 18-pin DIP and SW packages for applications which require SHUTDOWN. , LTC and LT are registered trademarks of Linear Technology Corporation. TransZorb is a registered trademark of General Instruments, GSI. 5V INPUT + ...
Page 2
... JMAX T = 125 C, JMAX (Note ON/OFF Positive Negative = High) OUT = Low) OUT TOP VIEW ORDER NUMBER 2 15 GND 3 14 TR1 OUT LT1781CN 4 13 REC1 IN LT1781CS 5 12 REC1 OUT LT1781CSW 6 11 TR1 TR2 REC2 OUT S PACKAGE SW PACKAGE 16-LEAD PLASTIC SO 16-LEAD PLASTIC C/W ( C/W (S) ...
Page 3
ELECTRICAL C HARA TERISTICS C PARAMETER CONDITIONS Logic Input Current 0.8V V Output Short-Circuit Current V OUT Output Leakage Current SHUTDOWN V Data Rate Slew Rate Propagation Delay Output Transition t Output ...
Page 4
LT1780/LT1781 W U TYPICAL PERFOR A Driver Maximum Output Voltage vs Load Capacitance 8.0 7.5 7.0 20k BAUD 6.5 60k BAUD 6.0 120k BAUD 5.5 5 LOAD CAPACITANCE (nF) ...
Page 5
W U TYPICAL PERFOR A Driver Leakage in Shutdown 100 10 V OUT 1 V OUT 0.1 50 –55 – TEMPERATURE ( C) Receiver Short-Circuit Current ISC ISC ...
Page 6
LT1780/LT1781 CTIO Input Supply Pin. This pin should be decoupled CC with a 0.1 F ceramic capacitor close to the package pin. Insufficient supply bypassing can result in low output drive ...
Page 7
U ESD PROTECTIO The RS232 line inputs of the LT1780/LT1781 have on-chip protection from ESD transients up to 15kV air gap and 8kV contact tested to IEC-1000-4-2 test methods. The protection structures act to divert the static discharge safely to ...
Page 8
LT1780/LT1781 PACKAGE DESCRIPTIO 0.300 – 0.325 (7.620 – 8.255) 0.009 – 0.015 (0.229 – 0.381) +0.035 0.325 –0.015 +0.889 8.255 –0.381 *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm) ...
Page 9
PACKAGE DESCRIPTIO 0.291 – 0.299** (7.391 – 7.595) 0.010 – 0.029 (0.254 – 0.737) 0.009 – 0.013 NOTE 1 (0.229 – 0.330) 0.016 – 0.050 (0.406 – 1.270) NOTE: 1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE ...
Page 10
LT1780/LT1781 PACKAGE DESCRIPTIO 0.291 – 0.299** (7.391 – 7.595) 0.010 – 0.029 45 (0.254 – 0.737) 0.009 – 0.013 NOTE 1 (0.229 – 0.330) 0.016 – 0.050 (0.406 – 1.270) NOTE: 1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ...
Page 11
... FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...
Page 12
... RS232 INPUT 30k 14 5 RS232 INPUT 30k 12 7 RS232 INPUT 30k – V GND 10 1780/81 • TA04 COMMENTS IEC-1000-4-2 Level 4 ESD Compliance Low Supply Current I = 220 A CC Configurable as Dual RS232 or Single RS485 Transceiver 17801f LT/TP 0498 4K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1998 ...