参数资料
型号: ST72141K2B3/XXX
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP32
封装: 0.400 INCH, PLASTIC, SDIP-32
文件页数: 26/133页
文件大小: 2615K
代理商: ST72141K2B3/XXX
Obsolete
Product(s)
- Obsolete
Product(s)
ST72141K2
121/133
10.6 SUPPLY, RESET AND CLOCK CHARACTERISTICS
10.6.1 Supply Manager
Recommended operating conditions with TA=-40 to +125
oC and voltages referred to V
SS.
10.6.2 RESET Sequence Manager
Recommended operating conditions with TA=-40 to +125
oC and 4.5V<V
DD-VSS<5.5V.
10.6.3 Clock System
Recommended operating conditions with TA=-40 to +125
oC and voltages referred to V
SS.
Notes:
1) LVD typical data is based on TA=25°C. This data is provided only as design guidelines and are not tested.
2) The VLVDhyst hysteresis is constant.
3) The VDD rise time rate condition is needed to ensure a correct device power-on reset. Not tested in production.
4) Data based on characterization results, not tested in production.
5) Unless otherwise specified, typical data is based on TA=25°C and VDD-VSS=5V. This data is provided only as design
guidelines and is not tested.
6) This data is based on typical a RSmax value. The oscillator selection can be optimized in terms of supply current with
a high quality resonator.
7) RSmax is the equivalent serial resistor of the crystal or ceramic resonator.
8) Data based on design simulations and/or technology characteristics, not tested in production.
LOW VOLTAGE DETECTOR (LVD)
Symbol
Parameter
Conditions
Min
Typ 1)
Max
Unit
VLVDr
Reset release threshold
VDD rise
4.05
4.30
V
VLVDf
Reset generation threshold
VDD fall
3.5
3.75
4.0
VLVDhyst
VLVD Hysteresis
2)
VLVDr - VLVDf
250
mV
VtPOR
VDD rise time rate
3)
0.2
50
V/ms
IDD
LVD Supply Current
HALT mode
100
2004)
μA
RESET SEQUENCE MANAGER (RSM)
Symbol
Parameter
Conditions
Min
Typ 5)
Max
Unit
RON
Reset weak pull-up resistance
VIN > VIH
VIN ≥VSS
5
20
10
80
20
180
k
Ω
tDELAYmin
Reset delay for external and
watchdog reset sources
500
ns
tPULSE
External RESET pin Pulse time
20
μs
EXTERNAL CLOCK SOURCE
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VOSC2h
OSC2 input pin high level voltage
Square wave signal
with ~50% Duty Cycle
0.7xVDD
VDD
V
VOSC2l
OSC2 input pin low level voltage
VSS
0.3xVDD
CRYSTAL AND CERAMIC RESONATOR OSCILLATORS
Symbol
Parameter
Conditions
Min
Typ 5)
Max
Unit
fOSC
Oscillator Frequency 6)
816
MHz
CLi
Load Capacitor
RSmax=100 Ω
7)
15 8)
18
21 6)
pF
IDD
Supply Current
700
1100 4)
μA
tSTART
Oscillator start-up time
Depends on resonator quality. A typical value is 10ms
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