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DS2154 Datasheet(PDF) 81 Page - Dallas Semiconductor |
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DS2154 Datasheet(HTML) 81 Page - Dallas Semiconductor |
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81 / 87 page  DS2154 81 of 87 AC CHARACTERISTICS - (0 °C to 70°C; V DD=5V ±=5% for DS2154L; TRANSMIT SIDE -40 °C to +85°C; V DD=5V ±=5% for DS2154LN) PARAMETER SYMBOL MIN TYP MAX UNITS NOTES TCLK Period tCP 488 ns TCLK Pulse Width tCH tCL 75 75 ns ns TCLKI Period tLP 488 ns TCLKI Pulse Width tLH tLL 75 75 ns TSYSCLK Period tSP tSP 122 122 648 448 ns ns 1 2 TSYSCLK Pulse Width tSH tSL 50 50 ns ns TSYNC or TSSYNC Set Up toTCLK or TSYSCLK falling tSU 20 tCH-5 or tSH-5 ns TSYNC or TSSYNC Pulse Width tPW 50 ns TSER, TSIG, TDATA, TLINK, TPOSI, TNEGI Set Up to TCLK, TSYSCLK, TCLKI Falling tSU 20 ns TSER, TSIG, TDATA, TLINK, TPOSI, TNEGI Hold from TCLK, TSYSCLK, TCLKI Falling tHD 20 ns TCLK, TCLKI, or TSYSCLK Rise and Fall Times tR, tF 25 ns Delay TCLKO to TPOSO, TNEGO Valid tDD 50 ns Delay TCLK to TESO Valid tD1 50 ns Delay TCLK to TCHBLK, TCHBLK, TSYNC, TLCLK tD2 50 ns Delay TSYSCLK to TCHCLK, TCHBLK tD3 75 ns See Figures 14-7 to 14-9 for details. NOTES: 1. TSYSCLK=1.544 MHz. 2. TSYSCLK=2.048 MHz. |
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