LTC1484 Linear Technology, LTC1484 Datasheet
LTC1484
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LTC1484 Summary of contents
Page 1
... IEC-1000-4-2 level 4 ( 8kV) contact and level 3 ( 8kV) air discharge ESD without latchup or damage. The LTC1484 is fully specified over the commercial and industrial temperature ranges and is available in 8-lead MSOP, PDIP and SO packages. , LTC and LT are registered trademarks of Linear Technology Corporation. ...
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... Input Current (A, B) IN2 V Differential Input Threshold Voltage for Receiver RATINGS Junction Temperature .......................................... 125 C + 0.3V) Operating Temperature Range CC + 0.3V) LTC1484C ......................................... LTC1484I ...................................... – Storage Temperature Range ................. – 150 C + 0.3V) Lead Temperature (Soldering, 10 sec).................. 300 ORDER PART NUMBER RO 1 LTC1484CMS8 ...
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... C = 15pF (Figures Closed 15pF (Figures Closed 15pF (Figures Closed 15pF (Figures Closed 100pF DIFF L1 L2 (Figures 4, 10 LTC1484 MIN TYP MAX 30 3.5 0 600 900 CC 400 700 250 35 250 ...
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... LTC1484 U SWITCHING CHARACTERISTICS temperature range, otherwise specifications are at T SYMBOL PARAMETER t Driver Enable from Shutdown to Output High ZH(SHDN) t Driver Enable from Shutdown to Output Low ZL(SHDN) t Receiver Enable from Shutdown to Output High ZH(SHDN) t Receiver Enable from Shutdown to Output Low ZL(SHDN) Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired ...
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... CM 400 300 200 100 0 –100 –200 V = –7V CM –300 –400 –55 –35 – 105 125 TEMPERATURE ( C) LTC1484 Receiver Input Threshold Voltage vs Supply Voltage –0. –0.04 –0.06 V TH(HIGH) –0.08 –0.10 –0.12 V TH(LOW) –0.14 –0.16 –0.18 –0.20 4 ...
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... LTC1484 W U TYPICAL PERFOR A CE CHARACTERISTICS Receiver Short-Circuit Current vs Temperature 100 V = 5.25V OUTPUT LOW 60 SHORT OUTPUT HIGH 20 SHORT TO GROUND 10 0 –55 –35 – 105 125 TEMPERATURE ( C) 1484 G13 Receiver Propagation Delay vs Supply Voltage 200 ...
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... 12V 4. OD3 1.0 DI HIGH SEE FIGURE 2 0.5 V FOR V = 4.5V TO 5.25V OD3 CC 0 –0.5 –55 –35 – 105 125 TEMPERATURE ( C) 1484 G29 LTC1484 Driver Differential Output Voltage vs Temperature 3 100 L 3.0 2 5.25V 2 4.75V 4.5V CC 1.5 1.0 0 4.5V TO 5.25V OD ...
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... TEMPERATURE ( C) 1484 G35 the DI pin low forces the driver outputs into a high impedance state. The LTC1484 enters shutdown when . RO is both receiver and driver outputs are disabled (RE is high TH(MIN) and DE is low). DI (Pin 4): Driver Input. When the driver outputs are enabled (DE high), DI high takes the A output high and the B output low ...
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... Receiver OUTPUTS † Shutdown mode for LTC1484 Table valid with or without termination resistors. 375 –7V TO 12V OD3 375 1484 F02 B Figure 15pF RE 1484 F04 LTC1484 5.25V. A 0.1 F ...
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... LTC1484 U W SWITCHI WAVEFOR 1. 90% 10% – 1 NOTE 1. 2. 2.3V 0V NOTE ARE THREE-STATED WHEN PULL- PULL-DOWN V OD2 A – – V OD2 NOTE – t ...
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... U APPLICATIONS INFORMATION Low Power Operation The LTC1484 has a quiescent current of 900 A max when the driver is enabled. With the driver in three-state, the supply current drops to 700 A max. The difference in these supply currents is due to the additional current drawn by the internal 22k receiver input resistors when the driver is enabled ...
Page 12
... A due to the additional current drawn through the external pull-up and the 22k input resistance of the LTC1484. ESD Protection The ESD performance of the LTC1484 A and B pins is characterized to meet 15kV using the Human Body Model (100pF, 1.5k ), IEC-1000-4-2 level ( 8kV) contact mode and IEC-1000-4-2 level 3 ( 8kV) air discharge mode ...
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... RO and DE with an XOR), it signals the presence of a second, active driver. The first driver falls silent, and the second driver seizes control. If the LTC1484 is connected as shown in Figure 11, the overhead of XORing the transmitted and received data in hardware or software is eliminated. DE and RE are con- nected together so the receiver is disabled and its output three-stated whenever a “ ...
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... With 220 resistors, both rising and falling edge delays are 2.2 s when driving a 1000-foot STP cable as shown in Figure 12b. The fail-safe feature of the LTC1484 receiver allows a CDMA system to function without the A and B pull-up and PACKAGE DESCRIPTION 0.007 0 – ...
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... TYP 0.014 – 0.019 (0.355 – 0.483) TYP LTC1484 0.400* (10.160) MAX 0.130 0.005 (3.302 0.127) 0.125 0.020 (3.175) MIN (0 ...
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... Differential Driver and Receiver Pair with Fail-Safe Receiver Output LT1785 60V Fault Protected RS485 Transceiver Linear Technology Corporation 16 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear-tech.com Fail-Safe “0” Application (Idle State = Logic “0”) 5V LTC1484 ...