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ST6215L/25L

1 GENERAL DESCRIPTION

1.1 INTRODUCTION

The ST6215L/25L are low voltage mask pro-

grammed ROM version of ST62T15C,T25C OTP

devices.

They offer the same functionality as OTP devices,

selecting as ROM options the options defined in

the programmable option byte of the OTP version,

with the exception of the LVD Reset that is not

available.

Figure 1. Programming wave form

1.2 ROM READOUT PROTECTION

If the ROM READOUT PROTECTION option is

selected, a protection fuse can be blown to pre-

vent any access to the program memory content.

In case the user wants to blow this fuse, high volt-

age must be applied on the TEST pin.

Figure 2. Programming Circuit

Note: ZPD15 is used for overvoltage protection

VR02001

0.5s min

15

10

5

1 4V typ

100 s max

t

t

4mA typ

100mA

150 s typ

max

TES T

TES T

VR02003

PROTECT

ZP D15

5V

V

SS

V

DD

TE S T

47

F

m

100nF

100nF

15V

14V

1