1/15

www.rohm.com

2009.07 - Rev.A

© 2009 ROHM Co., Ltd. All rights reserved.

IC Card Interface ICs

IC card interface ICs

with Built-in DC / DC Converter

BD8904F, BD8904FV, BD8905F, BD8906F, BD8906FV, BD8907F

●

Overview

BD8904F, BD8904FV, BD8905F, BD8906F, BD8906FV and BD8907F are an interface IC for a 3V or 5V smart card.

It works as a bidirectional signal buffer between a smart card and a controller. Also, it supplies 3V or 5V power to a smart

card. With electrostatic breakdown voltage of more than HBM: ±6000V, it protects the card contact pins.

●

Features

1) 3 half duplex bidirectional buffers

2) Protection against short-circuit for all the card contact pins

3) Card power source (VREG) of 3V or 5V

4) Overcurrent protection for card power source

5) Built-in thermal shutdown circuit

6) Built-in supply voltage detector

7) Automatic start-up/shutdown sequence function for card contact pin

Start-up sequence: driven by a signal from controller (CMDVCCB↓)

Shutdown sequence: driven by a signal from controller (CMDVCCB↑) and fault detection (card removal,

short circuit of card power, IC overheat detection, VDD or VDDP drop)

8) Card contact pin ESD voltage ≧ ±6000V

9) 2MHz - 26MHz integrated crystal oscillator

10) Programmable for clock division of output signal by 1, 1/2, 1/4, and 1/8

11) RST output control by RSTIN input signal (positive output)

12) One multiplexed card status output by OFFB signal

●

Line up matrix

Part No.

Resistor to set VDD

voltage detector

Input Voltage

Operating

temperature

Package

VDD

VDDP

BD8904F

External

2.7V - 5.5V

3.0V - 5.5V

-40°C - +85°C

SOP28

BD8904FV

External

2.7V - 5.5V

3.0V - 5.5V

-40°C - +85°C

SSOP-B28

BD8905F

External

2.7V - 5.5V

3.0V - 5.5V

-25°C - +85°C

SOP28

BD8906F

Built-in

3.0V - 5.5V

3.0V - 5.5V

-25°C - +85°C

SOP28

BD8906FV

Built-in

3.0V - 5.5V

3.0V - 5.5V

-25°C - +85°C

SSOP-B28

BD8907F

Built-in

3.0V - 5.5V

3.0V - 5.5V

-40°C - +85°C

SOP28

●

Application

Interface for smart cards

Interface for B-CAS cards

No.09056EAT02