The DS8313 smart card and SIM interface IC is a low-cost, analog front-end for a smart card reader designed for smart card applications that do not require the use of the auxiliary card I/O contacts C4 and C8 (AUX1 and AUX2). The DS8313 supports 5V, 3V, and 1.8V smart cards. The absence of a charge pump reduces active power consumption, and the DS8313 also supports an ultra-low-power 10nA stop mode. The DS8313 is designed to interface between a system microcontroller and the smart card interface, providing all power supply, protection, and level shifting required for IC card applications. The DS8314 is similar to the DS8313, but only uses one analog (smart card) power supply. Therefore, the device has reduced ability to provide power to smart cards, but it is still sufficient for many applications, allowing the DS8314 to drop into many TDA8024 sockets without hardware changes. The DS8313L and DS8314L use a negative polarity-presence detect instead of the default positive-polarity detect. Both devices are available in a 28-pin SO package.
The DS8313 and DS8314 are low‑cost analog front‑ends for smart‑card readers that support 5 V, 3 V, and 1.8 V cards. They supply power, protection, and level shifting between a host microcontroller and the smart‑card interface, with ultra‑low stop‑mode current (≤10 µA).
Both devices are offered in a 28‑pin SO package and include features such as internal card‑voltage generation, ESD protection, and flexible clock selection. The DS8314 uses a single analog power supply, reducing part count while still supporting the same voltage ranges.
| Supply Voltage (VDD) Range | 2.7 V to 6.0 V |
|---|---|
| Card Voltage‑Generator Supply (VDDA) Typical | 4.75 V to 6.0 V |
| Maximum Junction Temperature | +125 °C |
| Package | 28‑pin SO |
The DS8313 supports 5 V, 3 V, and 1.8 V smart cards.
Both ICs are supplied in a 28‑pin SO package.
Card presence is signaled on the PRES pin as an active‑high input with a debounce timeout.