参数资料
型号: MC74HC540AN
厂商: ON Semiconductor
文件页数: 5/8页
文件大小: 0K
描述: IC INVERTER 8-INPUT 20DIP
产品变化通告: Product Discontinuation 20/Aug/2008
标准包装: 18
系列: 74HC
逻辑类型: 逆变器,缓冲器
电路数: 1
输入数: 8
特点: 三态
电源电压: 2 V ~ 6 V
电流 - 静态(最大值): 4µA
输出电流高,低: 7.8mA,7.8mA
逻辑电平 - 低: 0.5 V ~ 1.8 V
逻辑电平 - 高: 1.5 V ~ 4.2 V
额定电压和最大 CL 时的最大传播延迟: 15ns @ 6V,50pF
工作温度: -55°C ~ 125°C
安装类型: 通孔
供应商设备封装: 20-PDIP
封装/外壳: 20-DIP(0.300",7.62mm)
包装: 管件
其它名称: MC74HC540ANOS
MC74HC540A
http://onsemi.com
5
Figure 3. Switching Waveform
VCC
GND
INPUT A
OUTPUT Y
tPHL
OE1 or OE2
50%
VCC
GND
OUTPUT Y
tPZL
OUTPUT Y
tPZH
HIGH
IMPEDANCE
VOL
VOH
HIGH
IMPEDANCE
10%
90%
tPLZ
tPHZ
50%
tPLH
90%
50%
10%
tr
tTHL
tf
tTLH
Figure 4. Switching Waveform
90%
50%
10%
50%
CL*
*Includes all probe and jig capacitance
TEST POINT
DEVICE
UNDER
TEST
OUTPUT
Figure 5. Test Circuit
Figure 6. Test Circuit
CL*
*Includes all probe and jig capacitance
TEST POINT
DEVICE
UNDER
TEST
OUTPUT
1kW
CONNECT TO VCC WHEN
TESTING tPLZ AND tPZL.
CONNECT TO GND WHEN
TESTING tPHZ and tPZH.
Figure 7. Logic Detail
One of Eight
Inverters
INPUT A
OE1
OE2
OUTPUT Y
VCC
To 7 Other Inverters
PIN DESCRIPTIONS
INPUTS
A1, A2, A3, A4, A5, A6, A7, A8 (PINS 2, 3, 4, 5, 6, 7, 8, 9)
Data input pins. Data on these pins appear in inverted form
on the corresponding Y outputs, when the outputs are
enabled.
CONTROLS
OE1, OE2 (PINS 1, 19)
Output enables (activelow). When a low voltage is
applied to both of these pins, the outputs are enabled and the
device functions as an inverter. When a high voltage is
applied to either input, the outputs assume the high
impedance state.
OUTPUTS
Y1, Y2, Y3, Y4, Y5, Y6, Y7, Y8 (PINS 18, 17, 16, 15, 14,
13, 12, 11)
Device outputs. Depending upon the state of the output
enable pins, these outputs are either inverting outputs or
highimpedance outputs.
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