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SLE 4436/36E is designed for applications in prepaid telephone cards. The chip consists of an

EEPROM memory of 221 bit, a ROM of 16 bits, a control/security unit and a special computing unit

for chip authentication. The shaded blocks in the block diagram (Figure 3) contain the enhanced

features of SLE 4436/36E compared to SLE 4406/06E.

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Identification Area

Data Areas

16 bit Manufacturer Code

8 bit Manufacturer Data

40 bit blockable PROM

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cation Key 1

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Identification Area

16 bit Manufacturer Code

48 bit blockable PROM

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Shaded blocks - Enhanced features of SLE 4436/36E compared to SLE 4406/06E

Blocks marked by cross hatch - Defined by chip manufacturer

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Backup Unit

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Counter, Identification Data (e.g. serial number, expiry date) and Data Areas.

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Setting of the address counter is synchronously with the CLK.

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