ST8024LTR datasheet(24/35 Pages) STMICROELECTRONICS

Teilenummer	ST8024LTR

Bauteilbeschribung	Smartcard interface

PDF	35 Pages

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Hersteller	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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24 / 35 page

Functional description

ST8024L

24/35

Doc ID 17709 Rev 5

Figure 7.

Deactivation sequence

6.9

VCC generator

The VCC generator has a capacity to supply up to 80 mA (max.) continuously at 5 V,

65 mA (max.) at 3 V, and 45 mA (max.) at 1.8 V. An internal overload detector operates at

approximately 120 mA. Current samples to the detector are internally filtered, allowing

spurious current pulses up to 200 mA with a duration in the order of µs to be drawn by the

card without causing deactivation. The average current must stay below the specified

maximum current value. For reasons of VCC voltage accuracy, a 100 nF capacitor with an

ESR < 350 m

Ω should be tied to CGND near to pin VCC, and a 100 nF capacitor with the

same ESR should be tied to CGND near card reader contact C1.

ST8024LTR Datenblatt(PDF) 24 Page - STMicroelectronics