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PCF85363ATL/AX 数据表(PDF) 69 Page - NXP Semiconductors |
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PCF85363ATL/AX 数据表(HTML) 69 Page - NXP Semiconductors |
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69 / 86 page  NXP Semiconductors PCF85363A Tiny Real-Time Clock/calendar with 64 byte RAM, alarm function, battery switch-over time stamp input, and I2C-bus VDD = 1.8 V to 5.5 V; VSS = 0 V; Tamb = -40 °C to +85 °C; fosc = 32.768 kHz; quartz Rs = 60 kΩ; CL = 7 pF; unless otherwise specified. All timing values are valid within the operating supply voltage and temperature range and referenced to VIL and VIH with an input voltage swing of VSS to VDD [1] . Symbol Parameter Conditions Min Max Unit tHD;DAT data hold time 0 - ns tSU;STO set-up time for STOP condition 0.6 - μs tVD;DAT data valid time 0 0.9 μs tVD;ACK data valid acknowledge time 0 0.9 μs tSP pulse width of spikes that must be suppressed by the input filter 0 50 ns Table 68. I2C-bus characteristics...continued [1] A detailed description of the I2C-bus specification is given in [4]. [2] I2C-bus access time between two STARTs or between a START and a STOP condition to this device must be less than one second. [3] A device must internally provide a hold time of at least 300 ns for the SDA signal (with respect to the VIH(min) of the SCL signal) to bridge the undefined region of the falling edge of SCL. [4] The maximum tf for the SDA and SCL bus lines is specified at 300 ns. The maximum fall time for the SDA output stage tf is specified at 250 ns. This allows series protection resistors to be connected in between the SDA and the SCL pins and the SDA/SCL bus lines without exceeding the maximum specified tf. SCL SDA tHD;STA tSU;DAT tHD;DAT tf tBUF tSU;STA tLOW tHIGH tVD;ACK 013aaa417 tSU;STO protocol START condition (S) bit 7 MSB (A7) bit 6 (A6) bit 0 (R/W) acknowledge (A) STOP condition (P) 1/fSCL tr tVD;DAT Figure 41. I2C-bus timing diagram; rise and fall times refer to 30 % and 70 % PCF85363A All information provided in this document is subject to legal disclaimers. © NXP B.V. 2021. All rights reserved. Product data sheet Rev. 3.1 — 18 June 2021 69 / 86 |
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