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| 型號： | SN54ALS162BFK |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 通用總線功能 |
| 英文描述： | SYNCHRONOUS 4-BIT DECADE AND BINARY COUNTERS |
| 中文描述： | 同步4位二進制計數(shù)器十年 |
| 文件頁數(shù)： | 12/14頁 |
| 文件大?。?/td> | 220K |
| 代理商： | SN54ALS162BFK |
SN54ALS161B, SN54ALS162B, SN54ALS163B, SN54AS161, SN54AS163
SN74ALS161B, SN74ALS163B, SN74AS161, SN74AS163
SYNCHRONOUS 4-BIT DECADE AND BINARY COUNTERS
SDAS276 – DECEMBER 1994
12
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
n-bit synchronous counters
This application demonstrates how the ripple-mode carry circuit (see Figure 1) and the carry-look-ahead circuit
(see Figure 2) can be used to implement a high-speed n-bit counter. The SN54ALS162B counts in BCD. The
′
ALS161B,
′
AS161,
′
ALS163B, and
′
AS163 count in binary. When additional stages are added, the f
max
decreases in Figure 1, but remains unchanged in Figure 2.
Figure 1. Ripple-Mode Carry Circuit
Figure 2. Carry-Look-Ahead Circuit
LOAD
ENT
C5/T,3,4+
QA
QB
QC
QD
CLR
A
B
C
D
CTR
CT=0
M1
G3
G4
RCO
CLK
ENP
3CT=MAX
1,5D
LOAD
ENT
C5/T,3,4+
QA
QB
QC
QD
CLR
A
B
C
D
CTR
CT=0
M1
G3
G4
RCO
CLK
ENP
3CT=MAX
1,5D
LOAD
ENT
C5/T,3,4+
QA
QB
QC
QD
CLR
A
B
C
D
CTR
CT=0
M1
G3
G4
RCO
CLK
ENP
3CT=MAX
1,5D
LOAD
ENT
C5/T,3,4+
QA
QB
QC
QD
CLR
A
B
C
D
CTR
CT=0
M1
G3
G4
RCO
CLK
ENP
3CT=MAX
1,5D
LSB
To More Significant Stages
Clear (L)
Count (H)
Disable (L)
Load (L)
Count (H)
Disable (L)
Clock
LOAD
ENT
C5/T,3,4+
QA
QB
QC
QD
CLR
A
B
C
D
CTR
CT=0
M1
G3
G4
RCO
CLK
ENP
3CT=MAX
1,5D
LOAD
ENT
C5/T,3,4+
QA
QB
QC
QD
CLR
A
B
C
D
CTR
CT=0
M1
G3
G4
RCO
CLK
ENP
3CT=MAX
1,5D
LOAD
ENT
C5/T,3,4+
QA
QB
QC
QD
CLR
A
B
C
D
CTR
CT=0
M1
G3
G4
RCO
CLK
ENP
3CT=MAX
1,5D
LOAD
ENT
C5/T,3,4+
QA
QB
QC
QD
CLR
A
B
C
D
CTR
CT=0
M1
G3
G4
RCO
CLK
ENP
3CT=MAX
1,5D
LSB
To More Significant Stages
Clear (L)
Count (H)
Disable (L)
Load (L)
Clock
fmax = 1/(CLK to RCO tPLH) + (ENT to RCO tPLH) (N – 2) + (ENT tsu)
fmax = 1/(CLK to RCO tPLH) + (ENP tsu)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SN54ALS163BFK | SYNCHRONOUS 4-BIT DECADE AND BINARY COUNTERS |
| SN54ALS162BJ | SYNCHRONOUS 4-BIT DECADE AND BINARY COUNTERS |
| SN54AS161FK | SYNCHRONOUS 4-BIT DECADE AND BINARY COUNTERS |
| SN54AS161J | SYNCHRONOUS 4-BIT DECADE AND BINARY COUNTERS |
| SN74AS161D | Dual 2-to-4 Decoder/ Demultiplexer; Package: SOIC 16 LEAD; No of Pins: 16; Container: Tape and Reel; Qty per Container: 2500 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SN54ALS163BJ | 制造商:Texas Instruments 功能描述:4-BIT SYNC BINARY COUNTER - Rail/Tube |
| SN54ALS169BJ | 制造商:Texas Instruments 功能描述:Counter Single 4-Bit Sync Binary UP/Down 16-Pin CDIP Tube |
| SN54ALS174J | 制造商:Texas Instruments 功能描述: |
| SN54ALS191AJ | 制造商:Texas Instruments 功能描述:Counter Single 4-Bit Async Binary UP/Down 16-Pin CDIP Tube 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| SN54ALS193AJ | 制造商:Texas Instruments 功能描述: |
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