MC54HC158J データシートの表示（PDF） - Motorola => Freescale
部品番号
コンポーネント説明
一致するリスト
MC54HC158J Datasheet PDF : 6 Pages
| |||
MC54/74HC158
PIN DESCRIPTIONS
INPUTS
A0–A3 (Pins 2,5,11,14)
Nibble A inputs. The data present on these pins is trans-
ferred to the outputs when the Select input is at a low level and
the Output Enable input is at a low level. The data is presented
to the outputs in inverted form for the HC158.
B0–B3 (Pins 3,6,10,13)
Nibble B inputs. The data present on these pins is trans-
ferred to the outputs when the Select input is at a high level and
the Output Enable input is at a low level. The data is presented
to the outputs in inverted form for the HC158.
OUTPUTS
Y0–Y3 (Pins 4,7,9,12)
Data outputs. The selected input nibble is presented at
these outputs when the Output Enable input is at a low level.
The data present on these pins is in its inverted form for the
HC158. For the Output Enable input at a high level, the outputs
are at a high level for the HC158.
CONTROL INPUTS
Select (Pin 1)
Nibble select. This input determines the data word to be
transferred to the outputs. A low level on this input selects the
A inputs and a high level selects the B inputs.
Output Enable (Pin 15)
Output Enable input. A low level on thisinput allows the
selected data to be presented at the outputs. A high level on
this input sets all of the outputs to a high level for the HC158.
2
A0
3
B0
5
A1
Nibble
Inputs
6
B1
11
A2
10
B2
14
A3
13
B3
15
Output Enable
1
Select
4
Y0
7
Y1
Data
Outputs
9
Y2
12
Y3
Figure 5. Expanded Logic Diagram
MOTOROLA
4
High–Speed CMOS Logic Data
DL129 — Rev 6
Share Link: 