LTC1487 LINER [Linear Technology], LTC1487 Datasheet
LTC1487
Available stocks
Related parts for LTC1487
LTC1487 Summary of contents
Page 1
... I/O pins are protected against multiple ESD strikes of over 10kV using the Human Body Model. The LTC1487 is fully specified over the commercial tem- perature range and is available in 8-pin DIP and SO packages. ...
Page 2
... O = LOW – 12V ORDER PART TOP VIEW NUMBER LTC1487CN8 LTC1487CS8 GND S8 PART MARKING S8 PACKAGE 8-LEAD PLASTIC SO 1487 = 125 C, = 130 C/ W (N8 125 C, = 150 C/ W (S8) JA MIN TYP MAX 2.0 1.5 0.2 0.2 2 0.8 = 12V 0. – ...
Page 3
... 100pF, DIFF L1 L2 (Figures 15pF (Figures 2, 8), S1 Closed 15pF (Figures 2, 8), S2 Closed 15pF (Figures 2, 8), S1 Closed 15pF (Figures 2, 8), S2 Closed LTC1487 MIN TYP MAX UNITS 5 V 2 – 0.2 0 120 200 A 80 ...
Page 4
... S1 Closed L Note 3: All typicals are given for V Note 4: The LTC1487 is not tested and is not quality-assurance sampled at – and These specifications are guaranteed by design, correlation, and/or inference from and/ tests. Driver Differential Output Voltage ...
Page 5
... LTC1487 • F03 LTC1487 < 5.25V. CC INPUTS OUTPUTS DE A – 0. – 0. Inputs Open TEST POINT LTC1487 • F02 Figure 2. Receiver Timing Test Load S1 500 OUTPUT LTC1487 • F04 Figure 4. Driver Timing Test Load ...
Page 6
... ZL(SHDN) ZL 1.5V OUTPUT NORMALLY LOW OUTPUT NORMALLY HIGH 1. ZH(SHDN) ZH Figure 8. Receiver Enable and Disable Times 1.5V 1 PHL t SKEW 90% 10% t LTC1487 • F05 f 1. 0.5V 0. LTC1487 • F06 1.5V t PLH 0V LTC1487 • F07 1. 0.5V 0. LTC1487 • F08 ...
Page 7
... U U APPLICATIO S I FOR ATIO High Input Impedance The LTC1487 is designed with a 96k (typ) input imped- ance to allow up to 256 transceivers to share a single RS485 differential data bus. The RS485 specification requires that a transceiver be able to drive as many as 32 “unit loads.” One unit load (UL) is defined as an imped- ance that draws a maximum of 1mA with up to 12V across it ...
Page 8
... RE must be HIGH and DE must be LOW for at least 600ns simultaneously. If this time duration is less than 50ns the part will not enter shutdown mode. Toggling either will wake the LTC1487 back up within 3 the driver is active immediately prior to shutdown, the supply current will not drop until the driver outputs have reached a steady state ...