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PDF ( 数据手册 , 数据表 ) ST62T25

零件编号 ST62T25
描述 8-BIT OTP/EPROM MCUs
制造商 ST Microelectronics
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ST62T25 数据手册, 描述, 功能
ST62T10, T15, T20, T25
- ST62E20, E25
8-BIT OTP/EPROM MCUs WITH A/D CONVERTER
s 3.0 to 6.0V Supply Operating Range
s 8 MHz Maximum Clock Frequency
s -40 to +85°C Operating Temperature Range
s Run, Wait and Stop Modes
s 5 Interrupt Vectors
s Look-up Table capability in OTP/EPROM
s Data OTP/EPROM: User selectable size
(in program EPROM)
s Data RAM: 64 bytes
s 12/20 I/O pins, fully programmable as:
– Input with pull-up resistor
– Input without pull-up resistor
– Input with interrupt generation
– Open-drain or push-pull output
– Analog Input
s 4 I/O lines can sink up to 20mA to drive LEDs or
TRIACs directly
s 8-bit Timer with 7-bit programmable prescaler
and external input
s Digital Watchdog
s 8-bit A/D Converter with 8 (ST62T10, T20, E20)
or 16 (ST62T15, T25, E25) analog inputs
s On-chip Clock oscillator can be driven by Quartz
crystal or Ceramic resonator
s Power-on Reset
s One external Non-Maskable Interrupt
s ST626x-EMU Emulation and Development
System (connects to an MS-DOS PC via an
RS232 serial line).
DEVICE SUMMARY
DEVICE
ST62T10
ST62T20
ST62E20
ST62T15
ST62T25
ST62E25
EPROM
(Bytes)
3884
3884
OTP
(Bytes)
1836
3884
I/O Pins
12
1836
3884
20
OTP PACKAGES
PDIP20
PDIP28
PSO20
PSO28
EPROM PACKAGES
CDIP20W
CDIP28W
(See end of Datasheet for Ordering Information)
July 1996
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261







ST62T25 pdf, 数据表
ST62T10, T15, T20, T25 - ST62E20, E25
1.4 PARTICULARITIES OF OTP AND EPROM DEVICES
OTP and EPROM devices are identical save for
the package which, in the EPROM device, is fitted
with a transparent window to allow erasure of
memory contents by exposure to UV light.
Both OTP and EPROM parts may be programmed
using programming equipment approved by SGS-
THOMSON.
1.4.1 OTP/EPROM Programming
Programming mode is selected by applying a
12.5V voltage to the VPP/TEST pin during reset.
Programming of OTP and EPROM parts is fully
described in the EPROM Programming Board
User Manual.
1.4.2 Eprom Erasure
Thanks to the transparent window present in the
EPROM package, its memory contents may be
erased by exposure to UV light.
Erasure begins when the device is exposed to
light with a wavelength shorter than 4000Å. It
should be noted that sunlight, as well as some
types of artificial light, includes wavelengths in the
3000-4000Å range which, on prolonged exposure,
can cause erasure of memory contents. It is thus
recommended that EPROM devices be fitted with
an opaque label over the window area in order to
prevent unintentional erasure.
The recommended erasure procedure for EPROM
devices consists of exposure to short wave UV
light having a wavelength of 2537Å. The minimum
recommended integrated dose (intensity x expo-
sure time) for complete erasure is 15Wsec/cm2.
This is equivalent to an erasure time of 15-20 min-
utes using a UV source having an intensity of
12mW/cm2 at a distance of 25mm (1 inch) from
the device window.
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268







ST62T25 equivalent, schematic
ST62T10, T15, T20, T25 - ST62E20, E25
Notes
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276










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