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參數(shù)資料
| 型號(hào)： | MM74HC148N |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 通用總線功能 |
| 英文描述： | 8-3 Line Priority Encoder |
| 中文描述： | HC/UH SERIES, 8-BIT ENCODER, PDIP16 |
| 封裝： | 0.300 INCH, PLASTIC, MS-001, DIP-16 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大小： | 77K |
| 代理商： | MM74HC148N |
October 1987
Revised February 1999
M
1999 Fairchild Semiconductor Corporation
DS009390.prf
www.fairchildsemi.com
MM74HC148
8-3 Line Priority Encoder
General Description
The MM74HC148 priority encoder utilizes advanced sili-
con-gate CMOS technology. It has the high noise immunity
and low power consumption typical of CMOS circuits, as
well as the speeds and output drive similar to LB-TTL.
This priority encoder accepts 8 input request lines 0–7 and
outputs 3 lines A0–A2. The priority encoding ensures that
only the highest order data line is encoded. Cascading cir-
cuitry (enable input EI and enable output EO) has been
provided to allow octal expansion without the need for
external circuitry. All data inputs and outputs are active at
the low logic level.
All inputs are protected from damage due to static dis-
charge by internal diode clamps to V
CC
and ground.
Features
I
Typical propagation delay: 13 ns
I
Wide supply voltage range: 2V–6V
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Pin Assignments for DIP, SOIC and TSSOP
Truth Table
H
=
HIGH
L
=
LOW
X
=
Irrelevant
Order Number
MM74HC148M
MM74HC148MTC
MM74HC148N
Package Number
M16A
MTC16
N16E
Package Description
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
Inputs
Outputs
EI 0 1 2 3 4 5 6 7 A2 A1 A0 GS EO
H X X X X X X X X
L H H H H H H H H
L
X X X X X X X L
L
X X X X X X L H
L
X X X X X L H H
L
X X X X L H H H
L
X X X L H H H H
L
X X L H H H H H
L
X L H H H H H H
L
L H H H H H H H
H
H
L
L
L
L
H
H
H
H
H
H
L
L
H
H
L
L
H
H
H
H
L
H
L
H
L
H
L
H
H
H
L
L
L
L
L
L
L
L
H
L
H
H
H
H
H
H
H
H
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MM74HC148MTC | 8-3 Line Priority Encoder |
| MM74HC14MTCX_NL | Hex Inverting Schmitt Trigger |
| MM74HC14MX_NL | Hex Inverting Schmitt Trigger |
| MM74HC14N_NL | Hex Inverting Schmitt Trigger |
| MM74HC14 | Hex Inverting Schmitt Trigger |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MM74HC14J | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MM74HC14J/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Hex Inverter |
| MM74HC14M | 功能描述:變換器 Hex Inv Schmitt Trig RoHS:否 制造商:NXP Semiconductors 電路數(shù)量:6 邏輯系列:74ABT 邏輯類型:BiCMOS 高電平輸出電流:- 15 mA 低電平輸出電流:20 mA 傳播延遲時(shí)間:2.2 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 工作溫度范圍: 封裝 / 箱體:DIP-14 封裝:Tube |
| MM74HC14M | 制造商:Fairchild Semiconductor Corporation 功能描述:IC 74HC CMOS SMD 74HC14 SOIC14 |
| MM74HC14M/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Hex Inverter |
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