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参数资料
| 型号： | SN74LS85MEL |
| 厂商： | ON SEMICONDUCTOR |
| 元件分类： | 算术逻辑单元 |
| 英文描述： | LS SERIES, 4-BIT MAGNITUDE COMPARATOR, TRUE OUTPUT, PDSO16 |
| 封装： | EIAJ, SOP-16 |
| 文件页数： | 4/7页 |
| 文件大小： | 191K |
| 代理商： | SN74LS85MEL |
NOTE:
The SN74LS85 can be used as a 5-bit comparator only
when the outputs are used to drive the A0A3 and B0B3
inputs of another SN74LS85 as shown in Figure 2 in posi-
tions #1, 2, 3, and 4.
SN74LS85
http://onsemi.com
4
Figure 1. Comparing Two n-Bit Words
L = LOW LEVEL
H = HIGH LEVEL
A0 A1 A2 A3 B0 B1 B2 B3
L
H
IA > B
IA < B
IA = B
OA > B
OA < B
OA = B
IA > B
IA < B
IA = B
OA > B
OA < B
OA = B
A > B
A < B
A = B
SN74LS85
A
n3
A
n2
A
n1
A
n
B
n3
B
n2
B
n1
B
n
APPLICATIONS
Figure 2 shows a high speed method of comparing two
24-bit words with only two levels of device delay. With the
technique shown in Figure 1, six levels of device delay result
when comparing two 24-bit words. The parallel technique
can be expanded to any number of bits, see Table 1.
Table 1
WORD LENGTH
NUMBER OF PKGS.
14 Bits
1
524 Bits
26
25120 Bits
831
MSB = MOST SIGNIFICANT BIT
LSB = LEAST SIGNIFICANT BIT
L = LOW LEVEL
H = HIGH LEVEL
NC = NO CONNECTION
A0 A1 A2 A3 B0 B1 B2 B3
L
H
IA > B
IA < B
IA = B
OA > B
OA < B
OA = B
#5
(LSB)
INPUTS
A0 A1 A2 A3 B0 B1 B2 B3
IA > B
IA < B
IA = B
OA > B
OA < B
OA = B
#1
L
NC
A20 A21
B23
B22
B21
B20
A23
A22
A19
B19
(MSB)
A5 A6 A7 A8 B5 B6 B7 B8
A0 A1 A2 A3 B0 B1 B2 B3
IA > B
IA < B
IA = B
OA > B
OA < B
OA = B
#4
NC
L
A4
B4
A0 A1 A2 A3 B0 B1 B2 B3
IA > B
IA < B
IA = B
OA > B
OA < B
OA = B
#3
NC
L
A9
B9
A10 A11
B13
B12
B11
B10
A13
A12
A0 A1 A2 A3 B0 B1 B2 B3
IA > B
IA < B
IA = B
OA > B
OA < B
OA = B
#2
NC
L
A14
B14
A15 A16
B18
B17
B16
B15
A18
A17
OUTPUTS
A0 A1 A2 A3 B0 B1 B2 B3
IA > B
IA < B
IA = B
OA > B
OA < B
OA = B
#6
INPUTS
Figure 2. Comparison of Two 24-Bit Words
相关PDF资料 |
PDF描述 |
|---|---|
| SN74LS85N | LS SERIES, 4-BIT MAGNITUDE COMPARATOR, TRUE OUTPUT, PDIP16 |
| SN74S85D | S SERIES, 4-BIT MAGNITUDE COMPARATOR, TRUE OUTPUT, PDSO16 |
| SN74S85NSRE4 | S SERIES, 4-BIT MAGNITUDE COMPARATOR, TRUE OUTPUT, PDSO16 |
| SN74LS90NS | LS SERIES, ASYN NEGATIVE EDGE TRIGGERED 3-BIT UP DECADE COUNTER, PDIP14 |
| SN74LS93NS | LS SERIES, ASYN NEGATIVE EDGE TRIGGERED 3-BIT UP BINARY COUNTER, PDIP14 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SN74LS85ML1 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| SN74LS85N | 功能描述:校验器 IC 4-bit binary or BCD Magnitude Comparator RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
| SN74LS85N | 制造商:Texas Instruments 功能描述:IC 74LS 74LS85 DIP16 5.25V |
| SN74LS85N | 制造商:Texas Instruments 功能描述:IC 74LS 74LS85 DIP16 5.25V |
| SN74LS85NDS | 制造商:Motorola Inc 功能描述:MAGNITUDE COMPARATOR, 16 Pin, Plastic, DIP |
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