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參數(shù)資料
| 型號： | 74HCT244 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Octal buffer/line driver; 3-state |
| 中文描述： | 八路緩沖器/線路驅(qū)動器，3態(tài) |
| 文件頁數(shù)： | 2/7頁 |
| 文件大?。?/td> | 39K |
| 代理商： | 74HCT244 |
December 1990
2
Philips Semiconductors
Product specification
Octal buffer/line driver; 3-state
74HC/HCT244
FEATURES
Output capability: bus driver
I
CC
category: MSI
GENERAL DESCRIPTION
The 74HC/HCT244 are high-speed Si-gate CMOS devices
and are pin compatible with low power Schottky TTL
(LSTTL). They are specified in compliance with JEDEC
standard no. 7A.
The 74HC/HCT244 are octal non-inverting buffer/line
drivers with 3-state outputs. The 3-state outputs are
controlled by the output enable inputs 1OE and 2OE.
A HIGH on nOE causes the outputs to assume a high
impedance OFF-state. The “244” is identical to the “240”
but has non-inverting outputs.
QUICK REFERENCE DATA
GND = 0 V; T
amb
= 25
°
C; t
r
= t
f
= 6 ns
Notes
1.
C
PD
is used to determine the dynamic power dissipation (P
D
in
μ
W):
P
D
= C
PD
×
V
CC2
×
f
i
+ ∑
(C
L
×
V
CC2
×
f
o
) where:
f
i
= input frequency in MHz
f
o
= output frequency in MHz
∑
(C
L
×
V
CC2
×
f
o
) = sum of outputs
C
L
= output load capacitance in pF
V
CC
= supply voltage in V
For HC the condition is V
I
= GND to V
CC
For HCT the condition is V
I
= GND to V
CC
1.5 V
2.
ORDERING INFORMATION
See
“74HC/HCT/HCU/HCMOS Logic Package Information”
.
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
HC
HCT
t
PHL
/ t
PLH
propagation delay
1A
n
to 1Y
n
;
2A
n
to 2Y
n
input capacitance
power dissipation capacitance per buffer
C
L
= 15 pF; V
CC
= 5 V
9
11
ns
C
I
C
PD
3.5
35
3.5
35
pF
pF
notes 1 and 2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 74HC251 | 8-input multiplexer; 3-state |
| 74HCT251 | 8-input multiplexer; 3-state |
| 74HC253 | Dual 4-input multiplexer; 3-state |
| 74HCT253 | Dual 4-input multiplexer; 3-state |
| 74HC257 | Quad 2-input multiplexer 3-state |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74HCT244AD | 制造商:Motorola Inc 功能描述:BUFFER/DRIVER OCTAL NONINVERTING WITH 3-STATE OUTPUTS TTL-COMPATIBLE INPUTS |
| 74HCT244AN | 制造商:AVX Corporation 功能描述: |
| 74HCT244BQ | 制造商:NXP Semiconductors 功能描述:IC OCTAL BUFF/DVR 3-ST DHV |
| 74HCT244BQ,115 | 功能描述:緩沖器和線路驅(qū)動器 OCTAL BUFFER 3-STATE 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 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
| 74HCT244BQ-G | 功能描述:緩沖器和線路驅(qū)動器 OCTAL BUFFER 3-STATE 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 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
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