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74F385 PDF预览

74F385

更新时间: 2024-02-06 20:32:42
品牌 Logo 应用领域
恩智浦 - NXP /
页数 文件大小 规格书
6页 66K
描述
Quad serial adder/subtractor

74F385 技术参数

生命周期:Obsolete零件包装代码:DIP
包装说明:DIP,针数:20
Reach Compliance Code:unknownHTS代码:8542.39.00.01
风险等级:5.84其他特性:SERIAL ADDER; SUBTRACTOR
系列:F/FASTJESD-30 代码:R-PDIP-T20
逻辑集成电路类型:ADDER/SUBTRACTOR位数:1
功能数量:4端子数量:20
最高工作温度:70 °C最低工作温度:
封装主体材料:PLASTIC/EPOXY封装代码:DIP
封装形状:RECTANGULAR封装形式:IN-LINE
传播延迟(tpd):10 ns认证状态:Not Qualified
最大供电电压 (Vsup):5.25 V最小供电电压 (Vsup):4.75 V
标称供电电压 (Vsup):5 V表面贴装:NO
技术:TTL温度等级:COMMERCIAL
端子形式:THROUGH-HOLE端子位置:DUAL
Base Number Matches:1

74F385 数据手册

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Philips Semiconductors  
Product specification  
Quad serial adder/subtractor  
74F385  
FEATURES  
PIN CONFIGURATION  
Four independent adders/subtractors  
1
2
3
4
5
20  
19  
18  
17  
16  
CP  
F0  
S0  
B0  
A0  
A1  
B1  
S1  
F1  
V
CC  
Two’s complement arithmetic  
Synchronous operation  
F3  
S3  
B3  
A3  
A2  
B2  
S2  
F2  
MR  
Common Clear and Clock  
74F385 is designed for use with serial multipliers in implementing  
digital filters and butterfly networks in fast Fourier transforms  
6
7
8
9
15  
14  
13  
12  
11  
DESCRIPTION  
The 74F385 contains four independent adder/subtractor elements  
with common Clock and Master Reset. Each adder/subtractor  
contains a sum flop-flop and a carry flip-flop for synchronous  
operations. Flip-flop state changes occur on the rising edge of the  
Clock Pulse (CP) input signal. The Select (S) input should be Low  
for the Add (A plus B) mode and High for the Subtract (A minus B)  
mode. A Low signal on the asynchronous Master Reset (MR) input  
clears the sum flip-flop and resets the Carry flip-flop to zero in the  
Add mode or presets it to one in the Subtract mode.  
GND 10  
SF00928  
TYPICAL SUPPLY  
CURRENT (TOTAL)  
TYPE  
TYPICAL f  
MAX  
74F385  
140 MHz  
55mA  
ORDERING INFORMATION  
COMMERCIAL RANGE  
= 5V ±10%, T = 0°C to +70°C  
DESCRIPTION  
V
CC  
amb  
20-pin plastic DIP  
20-pin plastic SO  
N74F385N  
N74F385D  
INPUT AND OUTPUT LOADING AND FAN OUT TABLE  
PINS  
DESCRIPTION  
74F (U.L.)  
HIGH/LOW  
LOAD VALUE  
HIGH/LOW  
20µA/0.6mA  
20µA/0.6mA  
20µA/0.6mA  
20µA/0.6mA  
20µA/0.6mA  
1.0mA/20mA  
A0 – A3  
B0 – B3  
S0 – S3  
CP  
A operand inputs  
B operand inputs  
Function select inputs  
1.0/1.0  
1.0/1.0  
1.0/1.0  
1.0/1.0  
1.0/1.0  
50/33  
Clock pulse input (active rising edge)  
Asynchronous Master Reset input (active Low)  
Sum or difference outputs  
MR  
F0–F3  
NOTE:  
One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state.  
1
1989 Sep 20  
853–0868 97678  

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