EN
ET4557
Contact
General Description
The ET4557 device is built for interfacing a SIM card with a single low-voltage 1.08V to 1.98V host side interface. The ET4557 contains three 1.62V to 3.6V level translators to convert the data, RST and CLK signals between a SIM card and a host micro controller. The ET4557 is compliant with all ETSI, IMT-2000 and ISO-7816 SIM/Smart card interface requirements.
Specification
Sample
Features
- Supports clock speed up to 10MHz clock
- Compliant with all ETSI, IMT-2000 and ISO-7816 SIM/Smart card interface requirements
- Support SIM card supply voltages with range of 1.62V to 3.6V
- Host micro controller operating voltage range: 1.08V to 1.98V
- Automatic level translation of I/O, RST and CLK between SIM card and host side interface with capacitance isolation
- Incorporates shutdown feature for the SIM card signals according to ISO-7816-3
- Automatic enable and disable through VCCB
- Integrated pull-up and pull-down resistors: no external resistors required
- Integrated EMI filters suppress higher harmonics of digital I/Os
- Integrated 8kV ESD protection according to IEC 61000-4-2, level 4 on all SIM card contact pins
- Level shifting buffers keep ESD stress away from the host (zero-clamping concept)
- Pb-free, Restriction of Hazardous Substances (RoHS) compliant and free of halogen and antimony (Dark Green compliant)
Technical Documentation
| Type | Title | Format | Date |
|---|---|---|---|
| Datasheet | ET4557 Datasheet | 2025-12-07 |
