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參數(shù)資料
| 型號(hào)： | 74HCT242 |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 通用總線功能 |
| 英文描述： | 4-Bit Synchronous Binary Counters 16-SOIC -40 to 85 |
| 中文描述： | 采用16-SOIC封裝的4位同步二進(jìn)制計(jì)數(shù)器 工作溫度-40℃到85℃ |
| 文件頁(yè)數(shù)： | 6/7頁(yè) |
| 文件大小： | 49K |
| 代理商： | 74HCT242 |
December 1990
6
Philips Semiconductors
Product specification
Quad bus transceiver; 3-state; inverting
74HC/HCT242
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
.
Output capability: bus driver
I
CC
category: MSI
Note to HCT types
The value of additional quiescent supply current (
I
CC
) for a unit load of 1 is given in the family specifications.
To determine
I
CC
per input, multiply this value by the unit load coefficient shown in the table below.
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
r
= t
f
= 6 ns; C
L
= 50 pF
INPUT
UNIT LOAD COEFFICIENT
A
n
B
n
OE
A
OE
B
1.10
1.10
1.00
1.00
SYMBOL PARAMETER
T
amb
(
°
C)
UNIT
TEST CONDITIONS
74HCT
V
CC
(V)
WAVEFORMS
+
25
40 to
+
85
40 to
+
125
min.
typ.
max.
min. max. min.
max.
t
PHL
/ t
PLH
propagation delay
A
n
to B
n
;
B
n
to A
n
3-state output enable time
OE
A
to A
n
or B
n
;
OE
B
to A
n
or B
n
3-state output disable time
OE
A
to A
n
or B
n
;
OE
B
to A
n
or B
n
output transition time
12
20
25
30
ns
4.5
Fig.5
t
PZH
/ t
PZL
16
34
43
51
ns
4.5
Figs 6 and 7
t
PHZ
/ t
PLZ
22
35
44
53
ns
4.5
Figs 6 and 7
t
THL
/ t
TLH
5
12
15
18
ns
4.5
Fig.5
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| 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: |
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