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ST7GEME4 数据表(PDF) 20 Page - STMicroelectronics |
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ST7GEME4 数据表(HTML) 20 Page - STMicroelectronics |
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20 / 28 page ![]() Electrical characteristics ST7GEME4 20/28 3 V regulator output (for IEC 7816-3 Class B Cards) VCRDVCC SmartCard power supply voltage 2.7 3.3 V ISC SmartCard supply current 50 mA IOVDET Current overload detection 100(1) mA tIDET Detection time on current overload 170(1) 1400(1) µs tOFF VCRDVCC turn-off time CLOADmax ≤ 4.7µF 750 µs tON VCRDVCC turn-on time CLOADmax ≤ 4.7µF 150 500 µs 1.8V regulator output (for IEC 7816-3 Class C Cards) VCRDVCC SmartCard power supply voltage 1.65 1.95 V ISC SmartCard supply current 20 mA IOVDET Current overload detection 100(1) mA tIDET Detection time on current overload 170(1) 1400(1) µs tOFF VCRDVCC turn-off time CLOADmax ≤ 4.7µF 750 µs tON VCRDVCC turn-on time CLOADmax ≤ 4.7µF 150 500 µs Smartcard CLKPin VOL Output low level voltage I = -50 µA - - 0.4(3) V VOH Output high level voltage I = 50 µA VCRDVCC-0.5 (3) -- V TOHL Output high to low fall time(1) Cl = 30 pF - 20 ns TOLH Output low to high rise time(1) Cl = 30 pF - 20 ns FVAR Frequency variation(1) -1 % FDUTY Duty cycle(1) 45 55 % POL Signal low perturbation(1) -0.25 0.4 V POH Signal high perturbation(1) VCRDVCC-0.5 VCRDVCC +0.25 V ISGND Short-circuit to ground(1) 15 mA Smartcard I/O Pin VIL Input low level voltage - - 0.5(3) V VIH Input high level voltage 0.6VCRDVCC (3) -- V VOL Output low Level Voltage I = -0.5 mA - - 0.4(3) V VOH Output high level voltage I = 20 µA 0.8VCRDVCC (3) -VCRDVCC (3) V IL Input leakage current(1) VSS<VIN<VSC_PWR -10 - 10 µA IRPU Pull-up equivalent resistance VIN=VSS 24 30 k Ω Table 18. Smartcard supply supervisor characteristics (continued) Symbol Parameter Conditions Min Typ Max Unit |
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