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參數(shù)資料
| 型號： | 74HC242 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Quad bus transceiver; 3-state; inverting |
| 中文描述： | 四總線收發(fā)器，三態(tài);反相 |
| 文件頁數(shù)： | 2/7頁 |
| 文件大?。?/td> | 49K |
| 代理商： | 74HC242 |
December 1990
2
Philips Semiconductors
Product specification
Quad bus transceiver; 3-state; inverting
74HC/HCT242
FEATURES
Inverting 3-state outputs
2-way asynchronous data bus communication
Output capability: bus driver
I
CC
category: MSI
GENERAL DESCRIPTION
The 74HC/HCT242 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/HCT242 are quad bus transceivers featuring
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 “242” is similar to the “243” but has 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
×
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
C
L
= 15 pF; V
CC
= 5 V
7
10
ns
C
I
C
I/O
C
PD
3.5
10
29
3.5
10
32
pF
pF
pF
notes 1 and 2
相關PDF資料 |
PDF描述 |
|---|---|
| 74HCT242 | 4-Bit Synchronous Binary Counters 16-SOIC -40 to 85 |
| 74HC243 | Quad bus transceiver; 3-state |
| 74HCT243 | Quad bus transceiver; 3-state |
| 74HC244 | Octal buffer/line driver; 3-state |
| 74HCT244 | Octal buffer/line driver; 3-state |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 74HC242D-T | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Bus Transceiver |
| 74HC243 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Quad bus transceiver; 3-state |
| 74HC243D | 功能描述:總線收發(fā)器 QUAD TRANSCEIVER INV 3-S RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
| 74HC243D,112 | 功能描述:總線收發(fā)器 QUAD TRANSCEIVER RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
| 74HC243D,118 | 功能描述:總線收發(fā)器 QUAD TRANSCEIVER RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
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