參數(shù)資料
型號: MC74LCX2245DT
廠商: MOTOROLA INC
元件分類: 通用總線功能
英文描述: LOW-VOLTAGE CMOS OCTAL TRANSCEIVER
中文描述: LVC/LCX/Z SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDSO20
封裝: PLASTIC, TSSOP-20
文件頁數(shù): 5/8頁
文件大?。?/td> 161K
代理商: MC74LCX2245DT
MC74LCX2245
LCX DATA
BR1339 — REV 3
5
MOTOROLA
CAPACITIVE CHARACTERISTICS
Symbol
Parameter
Condition
Typical
Unit
CIN
Input Capacitance
VCC = 3.3V, VI = 0V or VCC
7
pF
CI/O
Input/Output Capacitance
VCC = 3.3V, VI = 0V or VCC
8
pF
CPD
Power Dissipation Capacitance
10MHz, VCC = 3.3V, VI = 0V or VCC
25
pF
WAVEFORM 1 – PROPAGATION DELAYS
tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
2.7V
0V
VOH
VOL
An, Bn
Bn, An
tPHL
tPLH
WAVEFORM 2 – OUTPUT ENABLE AND DISABLE TIMES
tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
Figure 3. AC Waveforms
2.7V
0V
0V
OE, T/R
An, Bn
tPZH
3.0V
tPHZ
tPZL
tPLZ
An, Bn
1.5V
1.5V
1.5V
1.5V
1.5V
1.5V
1.5V
VCC
VOH – 0.3V
VOL + 0.3V
GND
1.5V
OPEN
GND
PULSE
GENERATOR
RT
DUT
VCC
RL
R1
CL
6V
TEST
SWITCH
tPLH, tPHL
Open
tPZL, tPLZ
6V
Open Collector/Drain tPLH and tPHL
6V
tPZH, tPHZ
CL = 50pF or equivalent (Includes jig and probe capacitance)
RL = R1 = 500
or equivalent
RT = ZOUT of pulse generator (typically 50
)
GND
Figure 4. Test Circuit
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