LTC1345 LINER [Linear Technology], LTC1345 Datasheet
LTC1345
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LTC1345 Summary of contents
Page 1
... V.35 interface from a single 5V supply. Combined with an external resistor termination network and an LT for the control signals, the LTC1345 forms a complete low power DTE or DCE V.35 interface port operating from a single 5V supply. The LTC1345 features three current output differential transmitters, three differential receivers, and a charge pump ...
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... HIGH OS No Load HIGH Shutdown Load HIGH ORDER PART NUMBER – LTC1345CNW 26 Y1 LTC1345CSW 25 Z1 LTC1345INW 24 Y2 LTC1345ISW PACKAGE 28-LEAD PLASTIC C/W (NW C/W (SW) MIN TYP ...
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... ceramic Transmitter Output Skew vs Temperature – 1.5 2.0 –50 25 TEMPERATURE (˚C) UNITS kHz Mbaud 75 100 125 LTC1345 • TPC03 3 ...
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... A2 (Pin 17): Receiver 2 Inverting Input. B2 (Pin 18): Receiver 2 Noninverting Input. A3 (Pin 19): Receiver 3 Inverting Input. B3 (Pin 20): Receiver 3 Noninverting Input. Z3 (Pin 21): Transmitter 3 Inverting Output. V Voltage vs Temperature EE 30 –4 –5.0 20 –5.5 15 –6.0 10 –6.5 –50 – TEMPERATURE (˚C) LTC1345 • TPC08 100 125 LTC1345 • TPC06 ...
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... Z1 AND RECEIVER B R OUTPUT A OE 15pF LTC1345 • F01 Figure 2. Receiver Output Enable/Disable Timing Test Load LTC1345 INPUTS OUTPUTS B – AND 0. – – 0.2V ...
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... OUTPUT 1.5V Figure 4. V.35 Receiver Propagation Delays 1. 1MHz: t 10ns: t 10ns 1.5V OUTPUT NORMALLY LOW t ZH OUTPUT NORMALLY HIGH 1.5V Figure 5. Receiver Enable and Disable Times 1.5V t PHL 90% 50% 10 SKEW LTC1345 • F03 0V t PHL 1.5V LTC1345 • F04 1. 0. 0.5V LTC1345 • F05 ...
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... W U Cable Termination Each end of the cable connected to an LTC1345 must be terminated by either one of two electrically equivalent external Y or resistor networks for proper operation. The Y-termination has two series connected 50 resistors and a 125 resistor connected between ground and the center tap of the two 50 resistors as shown in Figure 6A ...
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... Complete V.35 Port Figure 8 shows the schematic of a complete surface mounted, single 5V DTE and DCE V.35 port using only three ICs and eight capacitors per port. The LTC1345 is used to transmit the clock and data signals, and the LT1134A to transmit the control signals. If test signals ...
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... CC2 0 LT1134A 0 LTC1345 • TA08 V CC2 0 ...
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... U APPLICATIONS INFORMATION RS422/RS485 Applications The receivers on the LTC1345 are ideal for RS422 and RS485 applications. Using the test circuit in Figure 9, the LTC1345 receivers are able to successfully reconstruct the data stream with the common-mode voltage meeting RS422 and RS485 requirements (12V to – 7V). ...
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... MIN 0.100 (2.54) BSC LTC1345 1.455* (36.957) MAX 0.018 0.003 (0.457 0.076) ...
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... LTC1345 PACKAGE DESCRIPTION 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 ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS. ...