ST8034HN

概述

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产品概述

描述

The ST8034HN and ST8034HC devices are complete low-cost analog interfaces for asynchronous and synchronous smartcards operating at a supply voltage of 5 V, 3 V or 1.8 V. The ST8034HN and ST8034HC devices can be placed between the card and the microcontroller to provide all supply, protection, detection and control functions, with just a few external components.

所有功能
Complete smartcard interface

ISO 7816, NDS and EMV 4.3 payment systems compatible

Three protected half-duplex bidirectional buffered I/O lines to the smartcard

5 V, 3 V or 1.8 V supply voltage for the smartcard (V_CC), pin-selectable. Ensures controlled V_CCrise and fall times and provides smart overload detection with glitch immunity.

Very low power consumption in deep shutdown mode

Chip select function allows the device interface to be isolated from the microcontroller signals - allows parallel combination of the card interface devices (ST8034HC)

Card clock generation by integrated crystal oscillator or from external clock source

Card clock frequency up to 20 MHz, programmable by CLKDIV1 and CLKDIV2 pins (ST8034HN) or by CLKDIV pin (ST8034HC), with synchronous frequency changes

Automatic activation and deactivation sequences initiated by the microcontroller
Emergency deactivation sequences initiated by a card supply short-circuit, card take-off, falling V_DD, V_DDP, or V_DD(INTF)or by the interface device overheating

Voltage supply supervisors

with a fixed threshold (V_DD, V_DDP)

with an external resistor divider to set the V_DD(INTF)threshold (PORADJ pin)

Multipurpose card status signalOFF

Non-inverted card reset pin RST driven by the RSTIN input

Thermal and short-circuit protection of all card contacts

Card presence detection contacts debounced

Enhanced card side ESD protection of 8 kV

Space saving QFN24 4 x 4 x 0.8 mm package

Temperature range -25 to +85 °C
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