參數(shù)資料
型號: 935056370112
廠商: NXP SEMICONDUCTORS
元件分類: 總線收發(fā)器
英文描述: LV/LV-A/LVX/H SERIES, OCTAL 1-BIT DRIVER, TRUE OUTPUT, PDSO20
封裝: PLASTIC, SOT-163, SO-20
文件頁數(shù): 11/14頁
文件大?。?/td> 168K
代理商: 935056370112
Philips Semiconductors
Product specification
74LV244
Octal buffer/line driver (3-State)
1998 May 20
6
AC CHARACTERISTICS
GND = 0V; tr = tf ≤ 2.5ns; CL = 50pF; RL =1K
CONDITION
LIMITS
SYMBOL
PARAMETER
WAVEFORM
CONDITION
–40 to +85
°C
–40 to +125
°C
UNIT
VCC(V)
MIN
TYP1
MAX
MIN
MAX
1.2
50
Propagation delay
2.0
17
24
31
tPHL/tPLH
Pro agation delay
1An to 1Yn;
2A to 2Y
Figures 1, 2
2.7
13
17
23
ns
2An to 2Yn
3.0 to 3.6
92
14
18
4.5 to 5.5
12
15
1.2
65
3-State output enable time
2.0
22
39
49
tPZH/tPZL
3-State out ut enable time
1OE to 1Yn;
2OE to 2Y
Figures 2, 3
2.7
16
29
36
ns
2OE to 2Yn
3.0 to 3.6
122
23
29
4.5 to 5.5
19
24
1.2
60
3-State output disable time
2.0
22
34
43
tPHZ/tPLZ
3-State out ut disable time
1OE to 1Yn;
2OE to 2Y
Figures 2, 3
2.7
17
24
32
ns
2OE to 2Yn
3.0 to 3.6
132
21
26
4.5 to 5.5
16
19
NOTES:
1. Unless otherwise stated, all typical values are measured at Tamb = 25°C.
2. Typical values are measured at VCC = 3.3 V.
AC WAVEFORMS
VM = 1.5 V at VCC ≥ 2.7 V and ≤ 3.6 V
VM = 0.5 × VCC at VCC < 2.7 V and ≥ 4.5 V
VOL and VOH are the typical output voltage drop that occur with the
output load.
VX = VOL + 0.3 V at VCC ≥ 2.7 V and ≤ 3.6 V
VX = VOL + 0.1 × VCC at VCC < 2.7 V and ≥ 4.5 V
VY = VOH – 0.3 V at VCC ≥ 2.7V and ≤ 3.6 V
VY = VOH – 0.1 × VCC at VCC < 2.7 V and ≥ 4.5 V
SV00617
VM
1An, 2An
INPUTS
1Yn, 2Yn
OUTPUT
VM
tPLH
tPHL
GND
VOL
VI
VOH
Figure 1. Input (1An, 2An) to output (1Yn, 2Yn)
propagation delays.
SV00623
outputs
disabled
outputs
enabled
outputs
enabled
tPHZ
tPZH
tPZL
tPLZ
HIGH-to-OFF
OFF-to-HIGH
LOW-to-OFF
OFF-to-LOW
VM
OE INPUT
VX
VOL
VOH
VY
GND
VCC
VI
VM
Qn OUTPUT
Figure 2. 3-State enable and disable times.
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