ST62T35B ST Microelectronics, ST62T35B Datasheet - Page 80

• Manufacturer Part Number: ST62T35B
• Description: (ST62E35B / ST62T35B) 8-BIT OTP/EPROM MCUs
• Manufacturer: ST Microelectronics

ST6235B
1 GENERAL DESCRIPTION
1.1 INTRODUCTION
The ST6235B is mask programmed ROM version
of ST62T35B 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.
Figure 1. Programming wave form
Note: ZPD15 is used for overvoltage protection
80/82
1
4mA typ
14V typ
100mA
TES T
TEST
ma x
15
10
5
100 s ma x
15 0 s typ
0.5s min
VR02001
t
t
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
TE S T
V
V
DD
S S
5V
100nF
47 F
100nF
m
ZP D15
15V
P ROTE CT
VR02003
14V