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SI2457 Datasheet(PDF) 7 Page - Silicon Laboratories |
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SI2457 Datasheet(HTML) 7 Page - Silicon Laboratories |
7 / 74 page Si2457/34/15/04 Rev. 1.0 7 Table 5. Absolute Maximum Ratings Parameter Symbol Value Unit DC Supply Voltage VD 4.1 V Input Current, Si2457/34/15/04 Digital Input Pins IIN ±10 mA Digital Input Voltage VIND –0.3 to 5.3 V CLKIN/XTALI Input Voltage VXIND –0.3 to (VD + 0.3) V Operating Temperature Range TA –10 to 100 °C Storage Temperature Range TSTG –40 to 150 °C Note: Permanent device damage may occur if the above absolute maximum ratings are exceeded. Functional operation should be restricted to the conditions as specified in the operational sections of this data sheet. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 6. Switching Characteristics (VD = 3.0 to 3.6 V, TA = 0 to 70 °C for F-Grade) Parameter Symbol Min Typ Max Unit CLKOUT Output Clock Frequency 2.048 — 49.152 MHz Baud Rate Accuracy tBD –1 — 1 % Start Bit ↓ to RTS ↓ tRTH —1/(2 x Baud Rate) —ns CTS or RTS ↑ High to Start Bit↓ tRTS 10 — — ns Stop Bit ↑ to CTS ↑ tCTH ——— ns RESET ↓ to RESET ↑ tRS 5.0 — — ms RESET ↑ to 1st AT Command tAT 300 — — ms Address Setup tAS 15 — — ns Address Hold tAH 0— — ns WR Low Pulse Width tWL 50 — — ns Write Data Setup Time tWDSU 20 — — ns Write Cycle Time tWC 120 — — ns Chip Select Setup tCSS 10 — — ns Chip Select Hold tCSH 0— — ns RD Low Pulse Width tRL 50 — — ns RD Low to Data Driven Time tRLDD — — 20 ns Data Hold tDH 10 — — ns RD High to Hi-Z Time tDZ — — 30 ns Read Cycle Time tRC 120 — — ns Note: All timing is referenced to the 50% level of the waveform. Input test levels are VIH =VD – 0.4 V, VIL =0.4 V |
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