VCC GND INPUT A OUTPUT Y t" />
參數(shù)資料
型號: MC74HC540AFELG
廠商: ON Semiconductor
文件頁數(shù): 5/8頁
文件大?。?/td> 0K
描述: IC INVERTER 8-INPUT 20SOEIAJ
產(chǎn)品變化通告: 1Q2012 Discontinuation 30/Mar/2012
標準包裝: 2,000
系列: 74HC
邏輯類型: 逆變器,緩沖器
電路數(shù): 1
輸入數(shù): 8
特點: 三態(tài)
電源電壓: 2 V ~ 6 V
電流 - 靜態(tài)(最大值): 4µA
輸出電流高,低: 7.8mA,7.8mA
邏輯電平 - 低: 0.5 V ~ 1.8 V
邏輯電平 - 高: 1.5 V ~ 4.2 V
額定電壓和最大 CL 時的最大傳播延遲: 15ns @ 6V,50pF
工作溫度: -55°C ~ 125°C
安裝類型: 表面貼裝
供應商設備封裝: SOEIAJ-20
封裝/外殼: 20-SOIC(0.209",5.30mm 寬)
包裝: 帶卷 (TR)
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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