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ST7SCR Datasheet(PDF) 83 Page - STMicroelectronics |
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ST7SCR Datasheet(HTML) 83 Page - STMicroelectronics |
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83 / 102 page  ST7SCR 83/102 Note 1 : Guaranteed by design. Note 2 : Data based on characterization results, not tested in production. Notes: VDD = 4.75 V, Card consumption = 55mA, CRDCLK frequency = 4MHz, LED with a 3mA current, USB in recep- tion mode and CPU in WFI mode. tON VCARD Turn on Time (see Figure 35 on page 61) CLOADmax ≤ 4.7uF 150 500 µs 1.8V regulator output (for IEC7816-3 Class C Cards) VCARD SmartCard Power Supply Voltage 1.65 1.95 V ISC SmartCard Supply Current 20 mA IOVDET Current Overload Detection 1001) mA tIDET Detection time on Current Overload 170 1) 1400 1) us tOFF VCARD Turn off Time (see Figure 35 on page 61) CLOADmax ≤ 4.7uF 750 us tON VCARD Turn on Time (see Figure 35 on page 61) CLOADmax ≤ 4.7uF 150 500 µs Smartcard CLKPin VOL Output Low Level Voltage I=-50uA - - 0.4 2) V VOH Output High Level Voltage I=50uA V CARD-0.5 2) -- V TOHL Output H-L Fall Time Cl=30pF - 20 ns TOLH Output L-H Rise Time Cl=30pF - 20 ns FVAR Frequency variation - 1 % FDUTY Duty cycle 45 55 % ISGND Short-circuit to Ground 15 mA Smartcard I/O Pin VIL Input Low Level Voltage - - 0.5 2) V VIH Input High Level Voltage 0.6V CARD 2) -- V VOL Output Low Level Voltage I=-0.5mA - - 0.4 2) V VOH Output High Level Voltage I=20uA 0.8V CARD 2) -VCARD 2) V IL Input Leakage Current VSS<VIN<VSC_PWR -10 - 10 µA IRPU Pull-up Equivalent Resistance VIN=VSS 24 30 K Ω TOHL Output H-L Fall Time Cl=30pF - 0.8 us TOLH Output L-H Rise Time Cl=30pF - 0.8 us ISGND Short-circuit to Ground 15 mA Smartcard RST C4 and C8 Pin VOL Output Low Level Voltage I=-0.5mA - - 0.4 2) V VOH Output High Level Voltage I=20uA VCARD-0.5 2) - VCARD 2) V TOHL Output H-L Fall Time Cl=30pF - 0.8 us TOLH Output L-H Rise Time Cl=30pF - 0.8 us ISGND Short-circuit to Ground 15 mA SMARTCARD SUPPLY SUPERVISOR Symbol Parameter Conditions Min Typ Max Unit |
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