Eurochip 66

Short Product Information

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2003-08-05

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General Description

SLE 6636/36E is designed for applications in prepaid telephone cards. The chip consists of an

EEPROM memory of 221 bit, a ROM of 16 or 24 bits respectively, a control/security unit and a

special computing unit for chip authentication.

Control Unit (Security Interface)

CLK

I/O

VCC

GND

RST

Address

Unit

Authentication

Unit

Programming Unit

Memory Unit

Counter

(PROM / EEPROM)

Identification Area

Data Areas (PROM)

16 bit Manufacturer Code

8 bit Manufacturer Data

40 bit blockable PROM

Authentication

Key 1 (PROM)

SLE 6636

SLE 6636E

Identification Area

16 bit Manufacturer Code

48 bit blockable PROM

optional

Authentication

Key 2 (PROM)

Backup Unit

Extended

Authentication

Mode

Figure 3

Block Diagram

• Memory Unit

—

—

Identification Data (e.g. serial number, expiry date);

—

Counter;

—

Data Areas.

• Address Unit

Setting of the address counter is synchronously with the CLK.

• Programming Unit

The programming voltage for the EEPROM/PROM is generated internally.