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PDF ST62T94M8 Data sheet ( Hoja de datos )
| Número de pieza | ST62T94M8 | |
| Descripción | 8-BIT HCMOS MCU | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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ST6294
8-BIT HCMOS MCU WITH
A/D CONVERTER, EEPROM & AUTO-RELOAD TIMER
PRELIMINARY DATA
3 to 6.0V Supply Operating Range
8 MHz Maximum Clock Frequency
-25 to +85°C Operating Temperature Range
Run, Wait & Stop Modes
5 different interrupt vectors
Look-up table capability in ROM
User ROM:
3868 bytes
Data ROM:
User selectable size
(in program ROM)
Data RAM:
128 bytes
EEPROM:
128 bytes
PDIP28, PSO28 packages
21 fully software programmable I/O as:
– Input with pull-up resistor
– Input without pull-up resistor
– Input with interrupt generation
– Open-drain or push-pull outputs
– Analog Inputs
8 I/O lines can sink up to 20mA for direct LED or
TRIAC driving
8 bit counter with a 7-bit programmable prescaler
(Timer1)
8 bit auto-reload timer with 7-bit programmable
prescaler (AR Timer)
Digital Watchdog
8 bit A/D Converter with up to 13 analog inputs
8 bit Synchronous Peripheral Interface (SPI)
On-chip clock oscillator (Quartz Crystal or Ce-
ramic)
Power-on Reset
Clock output
9 powerful addressing modes
The development tool of the ST6294 microcon-
trollers consists of the ST626x-EMU emulation
and development system connected via a stand-
ard RS232 serial line to an MS-DOS Personal
Computer
1
PDIP28
1
PSO28
(Ordering Information at the end of the datasheet)
October 1993
This is Preliminary Data from SGS-THOMSON. Details are subject to change without notice.
1/26
1 page  
ST6294
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings
This product contains devices to protect the inputs
against damage due to high static voltages, how-
ever it is advised to take normal precaution to avoid
application of any voltage higher than maximum
rated voltages.
For proper operation it is recommended that VI and
VO must be higher than VSS and smaller VDD. Reli-
ability is enhanced if unused inputs are connected
to an appropriated logic voltage level (VDD or VSS).
Power Considerations. The average chip-junc-
tion temperature, Tj, in Celsius can be obtained
from :
Tj = TA + PD x RthJA
Where :TA =
Ambient Temperature.
RthJA = Package thermal resistance
(junction-to ambient).
PD = Pint + Pport.
Pint = IDD x VDD (chip internal power).
Pport = Port power dissipation
(determinated by the user).
Symbol
Parameter
Value
Unit
VDD Supply Voltage
VI Input Voltage
VO Output Voltage
-0.3 to 7.0
VSS - 0.3 to VDD + 0.3(1)
VSS - 0.3 to VDD + 0.3(1)
V
V
V
IO Current Drain per Pin Excluding VDD, VSS
10 mA
IINJ+ Pin Injection current (positive), All I/O, VDD = 4.5V
+5 mA
IINJ- Pin Injection current (negative), All I/O, VDD = 4.5V
-5 mA
IVDD
Total Current into VDD (source)
50 mA
IVSS Total Current out of VSS (sink)
50 mA
Tj Junction Temperature
150 °C
TSTG
Storage Temperature
-60 to 150
°C
Notes :
- Stresses above those listed as “absolute maximum ratings” may cause permanent damage to the device . This is a stress rating only
and functional operation of the device at these conditions is not implied. Exposure to maximum rating conditions for extended periods
may affect device reliability.
- (1) Within these limits, clamping diodes are guarantee to be not conductive. Voltages outside these limits are authorised as long as
injection current is kept within the specification.
THERMAL CHARACTERISTIC
Symbol
Parameter
RthJA Thermal Resistance
Test Conditions
PDIP28
PSO28
Min.
Value
Typ.
55
75
Max.
Unit
°C/W
5/26
5 Page 
ST6294
A/D CONVERTER CHARACTERISTICS
(TA= -25 to +85°C unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Value
Typ.
Max.
Res Resolution
8
ATOT Total Accuracy (1) (2)
fOSC > 1.2MHz
fOSC > 32kHz
±2
±4
tC Conversion Time
fOSC = 8MHz
70
VAN Conversion Range
VSS
VDD
ZIR Zero Input Reading
Conversion result
when VIN = VSS
00
Hex
FSR Full Scale Reading
Conversion result
when VIN = VDD
FF
Analog Input Current During
ADI Conversion
VDD= 4.5V
1.0
ACIN(3) Analog Input Capacitance
25
ASI Analog Source Impedance
Analog Channel
switched just before
conversion start (4)
30
Notes:
1. Noise at VDD, VSS <10mV
2. With oscillator frequencies less than 1MHz, the A/D Converter accuracy is decreased.
3. Excluding Pad Capacitance.
4. ASI can be increased as long as the load of the A/D Converter input capacitor is ensured before conversion start.
Unit
Bit
LSB
µs
V
Hex
µA
pF
kΩ
11/26
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