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參數(shù)資料
型號: SN74ACT240NE4
廠商: Texas Instruments
文件頁數(shù): 15/20頁
文件大小: 0K
描述: IC INVERTER DUAL 4-INPUT 20DIP
標(biāo)準(zhǔn)包裝: 20
系列: 74ACT
邏輯類型: 逆變器,緩沖器
電路數(shù): 2
輸入數(shù): 4
特點: 三態(tài)
電源電壓: 4.5 V ~ 5.5 V
電流 - 靜態(tài)(最大值): 4µA
輸出電流高,低: 24mA,24mA
邏輯電平 - 低: 0.8V
邏輯電平 - 高: 2V
額定電壓和最大 CL 時的最大傳播延遲: 8.5ns @ 5V,50pF
工作溫度: -40°C ~ 85°C
安裝類型: 通孔
供應(yīng)商設(shè)備封裝: 20-PDIP
封裝/外殼: 20-DIP(0.300",7.62mm)
包裝: 管件
SN54ACT240, SN74ACT240
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCAS515C JUNE 1995 REVISED OCTOBER 2002
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
switching
characteristics
over
recommended
operating
free-air
temperature
range,
VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
TA = 25°C
SN54ACT240
SN74ACT240
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
tPLH
A
Y
1.5
6
8.5
1
9.5
1.5
9.5
ns
tPHL
A
Y
1.5
5.5
7.5
1
9
1.5
8.5
ns
tPZH
OE
Y
1.5
7
8.5
1
10
1
9.5
ns
tPZL
OE
Y
2
7
9.5
1
11.5
1.5
10.5
ns
tPHZ
OE
Y
2
8
9.5
1
11
2
10.5
ns
tPLZ
OE
Y
2.5
6.5
10
1
11.5
2
10.5
ns
operating characteristics, VCC = 5 V, TA = 25°C
PARAMETER
TEST CONDITIONS
TYP
UNIT
Cpd
Power dissipation capacitance per buffer/driver
CL = 50 pF,
f = 1 MHz
45
pF
PARAMETER MEASUREMENT INFORMATION
From Output
Under Test
CL = 50 pF
(see Note A)
LOAD CIRCUIT
S1
2
× VCC
500
Ω
500
Ω
tPLH
tPHL
Output
Control
(low-level
enabling)
Output
Waveform 1
S1 at 2
× VCC
(see Note B)
Output
Waveform 2
S1 at Open
(see Note B)
VOL
VOH
tPZL
tPZH
tPLZ
tPHZ
1.5 V
≈VCC
3 V
0 V
50% VCC
VOH
VOL
0 V
50% VCC
VOL + 0.3 V
50% VCC
≈0 V
3 V
Open
Input
Output
VOLTAGE WAVEFORMS
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Open
2
× VCC
Open
TEST
S1
VOH 0.3 V
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR
≤ 1 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns.
D. The outputs are measured one at a time with one input transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms
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