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U6815BM Datasheet(PDF) 10 Page - ATMEL Corporation |
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U6815BM Datasheet(HTML) 10 Page - ATMEL Corporation |
10 / 14 page 10 4545D–BCD–04/09 U6815BM Serial Interface - Logic Inputs (DI, CLK, CS) Input voltage low level threshold Pins 24 to 26 V IL 0.3 × V VCC V Input voltage high level threshold Pins 24 to 26 VIH 0.7 × V VCC V Hysteresis of input voltage Pins 24 to 26 ΔV I 50 500 mV Pull-down current, Pins DI and CLK V DI, VCLK = VVCC, pins 25, 26 I PDSI 250 µA Pull-up current Pin CS V CS= 0V, pin 24 I PUSI –50 –2 µA Serial Interface - Logic Output (DO) Output voltage low level I OL = 3 mA, pin 18 V DOL 0.5 V Output voltage high level I OL = –2 mA, pin 18 V DOH V VCC – 1V V Leakage current (tristate) VCS = VVCC, 0V < VDO < VVCC, pin 18 IDO –10 10 mA 12. Electrical Characteristics (Continued) 7.5V < VVS < 40V; 4.5V < VVCC < 5.5V; INH = High; –40°C < Tj < 150°C; unless otherwise specified, all values refer to GND pins. Parameters Test Conditions/Pins Symbol Min. Typ. Max. Unit Notes: 1. Only valid for version U6815BM-N. 2. Delay time between rising edge of CS after data transmission and switch-on output stages to 90% of final level. 13. Serial Interface – Timing Parameters Test Conditions Timing Chart No.(1) Symbol Min. Typ. Max. Unit DO enable after CS falling edge C DO = 100 pF 1 t ENDO 200 ns DO disable after CS rising edge CDO = 100 pF 2 tDISDO 200 ns DO fall time C DO = 100 pF – t DOf 100 ns DO rise time C DO = 100 pF – t DOr 100 ns DO valid time C DO = 100 pF 10 t DOVal 200 ns CS setup time 4 t CSSethl 225 ns CS setup time V DO < 0.2 × VVCC 8t CSSetlh 225 ns CS high time Input register, Bit 14 (SCT) = high 9tCSh 140 ns Input register, Bit 14 (SCT) = low 9t CSh 17.5 ns CLK high time 5 tCLKh 225 ns CLK low time 6 tCLKl 225 ns CLK period time – tCLKp 500 ns CLK setup time 7 tCLKSethl 225 ns CLK setup time 3 tCLKSetlh 225 ns DI setup time 11 t DIset 40 ns DI hold time 12 t DIHold 40 ns Note: 1. see Figure 13-1 on page 11 |
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