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參數資料
| 型號： | MC74HC137 |
| 廠商： | Motorola, Inc. |
| 英文描述： | 1-of-8 Decoder/Demultiplexer with Address Latch |
| 中文描述： | 1 - 8解碼器/解復用器的地址鎖存 |
| 文件頁數： | 4/6頁 |
| 文件大小： | 210K |
| 代理商： | MC74HC137 |
MC74HC137
MOTOROLA
High–Speed CMOS Logic Data
DL129 — Rev 6
4
PIN DESCRIPTIONS
ADDRESS INPUTS
A0, A1, A2 (Pins 1, 2, 3)
Address inputs. These inputs, when the chip is enabled,
determine which of the eight outputs is selected.
CONTROL INPUTS
CS1, CS2 (Pins 6, 5)
Chip–Select inputs. For CS1 at a high level and CS2 at a
low level, the chip is enabled and the outputs follow the ad-
dress inputs (Latch Enable = L). For any other combination of
CS1 and CS2, the outputs are at a high level.
Latch Enable (Pin 4)
Latch–Enable input. A high level at this input latches the
Address. A low level at this input allows the outputs to follow
the data at the Address pins (CS1 = H and CS2 = L).
OUTPUTS
Y0 – Y7
Active–low outputs. One of these eight outputs is selected
when the chip is enabled (CS1 = H and CS2 = L) and the
data on the A0, A1, and A2 inputs correspond to that par-
ticular output. The selected output is at a low level while all
others remain at a high level.
SWITCHING WAVEFORMS
Figure 1.
50%
tPHL
tPLH
tTHL
tTLH
VCC
GND
Figure 2.
Figure 3.
Figure 4.
Figure 5.
VALID
VALID
INPUT A
OUTPUT Y
50%
VCC
GND
tr
tf
tPHL
tPLH
OUTPUT Y
CS2
90%
50%
10%
90%
50%
10%
VCC
GND
tPHL
50%
tPLH
50%
50%
tw
OUTPUT Y
LATCH
ENABLE
tr
VCC
GND
tPLH
tTLH
90%
50%
10%
OUTPUT Y
CS1
tPHL
90%
50%
10%
tTHL
LATCH
ENABLE
VCC
GND
VCC
GND
50%
50%
VALID
tsu
th
INPUT A
* Includes all probe and jig capacitance
Figure 6. Test Circuit
CL*
TEST POINT
DEVICE
UNDER
TEST
OUTPUT
tf
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相關代理商/技術參數 |
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| MC74HC137DR2 | 制造商:Motorola 功能描述:ON SEMICONDUCTOR S9G2B |
| MC74HC137F | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:ON Semiconductor 功能描述: |
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| MC74HC138AD | 功能描述:編碼器、解碼器、復用器和解復用器 2-6V 1-of-8 Decoder RoHS:否 制造商:Micrel 產品:Multiplexers 邏輯系列:CMOS 位數: 線路數量（輸入/輸出）:2 / 12 傳播延遲時間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
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