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參數(shù)資料
| 型號： | SN74AC244N |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 總線收發(fā)器 |
| 英文描述： | AC SERIES, DUAL 4-BIT DRIVER, TRUE OUTPUT, PDIP20 |
| 封裝： | ROHS COMPLIANT, PLASTIC, DIP-20 |
| 文件頁數(shù)： | 15/19頁 |
| 文件大?。?/td> | 755K |
| 代理商： | SN74AC244N |
SN54AC244, SN74AC244
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCAS514E JUNE 1995 REVISED OCTOBER 2003
5
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
SN54AC244
SN74AC244
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
tPLH
A
Y
1.5
5
7
1
9.5
1
7.5
ns
tPHL
A
Y
1.5
5
7
1
9
1
7.5
ns
tPZH
OE
Y
1.5
5
7
1
9
1.5
8
ns
tPZL
OE
Y
1.5
5.5
8
1
10.5
1.5
8.5
ns
tPHZ
OE
Y
2.5
6.5
9
1
10.5
1
9.5
ns
tPLZ
OE
Y
2
6.5
9
1
11
2
9.5
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
50% VCC
≈VCC
VCC
0 V
50% VCC
VOH
VOL
0 V
50% VCC
VOL + 0.3 V
50% VCC
VOH 0.3 V
≈0 V
VCC
Open
Input
Output
VOLTAGE WAVEFORMS
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Open
2
× VCC
Open
TEST
S1
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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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SN74AC244N | 制造商:Texas Instruments 功能描述:Buffer / Driver / Receiver Logic IC |
| SN74AC244NE4 | 功能描述:緩沖器和線路驅(qū)動器 Octal Buffer/Driver With 3-State Outputs RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
| SN74AC244NS | 制造商:Texas Instruments 功能描述: |
| SN74AC244NSR | 功能描述:緩沖器和線路驅(qū)動器 Tri-State Octal RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
| SN74AC244NSRE4 | 功能描述:緩沖器和線路驅(qū)動器 Octal Buffer/Driver With 3-State Outputs RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
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