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M24M01-R 数据表(PDF) 25 Page - STMicroelectronics |
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M24M01-R 数据表(HTML) 25 Page - STMicroelectronics |
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25 / 36 page ![]() M24M01-R, M24M01-W, M24M01-HR DC and AC parameters 25/36 Table 14. AC characteristics at 1 MHz (M24M01-HR) Test conditions specified in Table 7 Symbol Alt. Parameter Min. Max. Unit fC fSCL Clock frequency 0 1 MHz tCHCL tHIGH Clock pulse width high 300 - ns tCLCH tLOW Clock pulse width low 400 - ns tXH1XH2 (1) 1. Input rise/fall time values recommended by the Fast-mode Plus I²C-bus specification. The M24xxx devices accept longer input rise/fall times provided that these rise/fall times are compatible with all other timing conditions defined in this AC table. tR Input signal rise time - 300 ns tXL1XL2 (1) tF Input signal fall time - 120 ns tQL1QL2 (2)(3) 2. Characterized only, not tested in production. 3. The SDA(out) rise time is not defined by the M24xxx, it is defined by the application pull-up resistor (connected on the SDA line) and, therefore, it is not specified in this table. tF SDA (out) fall time - 120 ns tDXCH tSU:DAT Data in setup time 80 - ns tCLDX tHD:DAT Data in hold time 0 - ns tCLQX tDH Data out hold time 50 - ns tCLQV (4)(5) 4. To avoid spurious Start and Stop conditions, a minimum delay is placed between SCL=1 and the falling or rising edge of SDA. 5. tCLQV is the time (from the falling edge of SCL) required by the SDA bus line to reach 0.8VCC, assuming that the Rbus × Cbus time constant is less than 150 ns (as specified in Figure 5). tAA Clock low to next data valid (access time) 50 500 ns tCHDL (6) 6. For a reStart condition, or following a Write cycle. tSU:STA Start condition setup time 250 - ns tDLCL tHD:STA Start condition hold time 250 - ns tCHDH tSU:STO Stop condition setup time 250 - ns tDHDL tBUF Time between Stop condition and next Start condition 500 - ns tW tWR Write time - 5 ms tNS (2) Pulse width ignored (input filter on SCL and SDA) -50 ns |
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