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參數(shù)資料
| 型號： | 74HCT243 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Quad bus transceiver; 3-state |
| 中文描述： | 四總線收發(fā)器，三態(tài) |
| 文件頁數(shù)： | 2/8頁 |
| 文件大?。?/td> | 49K |
| 代理商： | 74HCT243 |
December 1990
2
Philips Semiconductors
Product specification
Quad bus transceiver; 3-state
74HC/HCT243
FEATURES
Non-inverting 3-state outputs
2-way asynchronous data bus communication
Output capability: bus driver
I
CC
category: MSI
GENERAL DESCRIPTION
The 74HC/HCT243 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/HCT243 are quad bus transceivers featuring
non-inverting 3-state bus compatible outputs in both send
and receive directions.
They are designed for 4-line asynchronous 2-way data
communications between data buses.
The output enable inputs (OE
A
and OE
B
) can be used to
isolate the buses.
The “243” is similar to the “242” but has non-inverting (true)
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
A
n
to B
n
;
B
n
to A
n
input capacitance
input/output capacitance
power dissipation capacitance per transceiver notes 1 and 2
C
L
= 15 pF; V
CC
= 5 V
6
11
ns
C
I
C
I/O
C
PD
3.5
10
26
3.5
10
34
pF
pF
pF
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 74HC244 | Octal buffer/line driver; 3-state |
| 74HCT244 | Octal buffer/line driver; 3-state |
| 74HC251 | 8-input multiplexer; 3-state |
| 74HCT251 | 8-input multiplexer; 3-state |
| 74HC253 | Dual 4-input multiplexer; 3-state |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74HCT243D | 制造商:NXP Semiconductors 功能描述: 制造商:PHILIP 功能描述: |
| 74HCT243DB,118 | 制造商:NXP Semiconductors 功能描述: |
| 74HCT243P | 制造商:NXP Semiconductors 功能描述: |
| 74HCT244 | 制造商:NTE Electronics 功能描述: |
| 74HCT244AD | 制造商:Motorola Inc 功能描述:BUFFER/DRIVER OCTAL NONINVERTING WITH 3-STATE OUTPUTS TTL-COMPATIBLE INPUTS |
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