1. Under steady state (non-transient) conditions, IOL
參數(shù)資料
型號: AT89S51-24PC
廠商: Atmel
文件頁數(shù): 15/31頁
文件大?。?/td> 0K
描述: IC 8051 MCU 4K FLASH 40-DIP
標準包裝: 10
系列: 89S
核心處理器: 8051
芯體尺寸: 8-位
速度: 24MHz
連通性: UART/USART
外圍設備: WDT
輸入/輸出數(shù): 32
程序存儲器容量: 4KB(4K x 8)
程序存儲器類型: 閃存
RAM 容量: 128 x 8
電壓 - 電源 (Vcc/Vdd): 4 V ~ 5.5 V
振蕩器型: 內部
工作溫度: 0°C ~ 70°C
封裝/外殼: 40-DIP(0.600",15.24mm)
包裝: 管件
22
2487D–MICRO–6/08
AT89S51
Notes:
1. Under steady state (non-transient) conditions, IOL must be externally limited as follows:
Maximum I
OL per port pin: 10 mA
Maximum I
OL per 8-bit port:
Port 0: 26 mA
Ports 1, 2, 3: 15 mA
Maximum total IOL for all output pins: 71 mA
If IOL exceeds the test condition, VOL may exceed the related specification. Pins are not guaranteed to sink current greater
than the listed test conditions.
2. Minimum V
CC for Power-down is 2V.
23. DC Characteristics
The values shown in this table are valid for T
A = -40°C to 85°C and VCC = 4.0V to 5.5V, unless otherwise noted.
Symbol
Parameter
Condition
Min
Max
Units
V
IL
Input Low Voltage
(Except EA)
-0.5
0.2 V
CC-0.1
V
VIL1
Input Low Voltage (EA)
-0.5
0.2 VCC-0.3
V
IH
Input High Voltage
(Except XTAL1, RST)
0.2 V
CC+0.9
V
CC+0.5
V
VIH1
Input High Voltage
(XTAL1, RST)
0.7 VCC
VCC+0.5
V
VOL
Output Low Voltage(1) (Ports 1,2,3)
IOL = 1.6 mA
0.45
V
VOL1
Output Low Voltage(1)
(Port 0, ALE, PSEN)
IOL = 3.2 mA
0.45
V
OH
Output High Voltage
(Ports 1,2,3, ALE, PSEN)
IOH = -60 A, VCC = 5V ± 10%
2.4
V
I
OH = -25 A
0.75 V
CC
V
IOH = -10 A
0.9 VCC
V
OH1
Output High Voltage
(Port 0 in External Bus Mode)
IOH = -800 A, VCC = 5V ± 10%
2.4
V
I
OH = -300 A
0.75 V
CC
V
IOH = -80 A
0.9 VCC
V
IIL
Logical 0 Input Current (Ports 1,2,3)
VIN = 0.45V
-50
A
ITL
Logical 1 to 0 Transition Current
(Ports 1,2,3)
VIN = 2V, VCC = 5V ± 10%
-300
A
ILI
Input Leakage Current (Port 0, EA)0.45 < VIN < VCC
±10
A
RRST
Reset Pulldown Resistor
50
300
K
Ω
CIO
Pin Capacitance
Test Freq. = 1 MHz, TA = 25°C
10
pF
I
CC
Power Supply Current
Active Mode, 12 MHz
25
mA
Idle Mode, 12 MHz
6.5
mA
Power-down Mode(2)
VCC = 5.5V
50
A
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