參數(shù)資料
型號(hào)： 74F269
廠商： Fairchild Semiconductor Corporation
元件分類： 通用總線功能
英文描述： 8-Bit Bidirectional Binary Counter
中文描述： 8位雙向二進(jìn)制計(jì)數(shù)器
文件頁(yè)數(shù)： 3/14頁(yè)
文件大小： 118K
代理商： 74F269
Philips Semiconductors
Product specification
74F269
8–bit bidirectional binary counter
1996 Jan 05
3
LOGIC SYMBOL
U/D
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
1
24
11
P0
P1
P2
P3
P4
P5
P6
P7
2
3
4
5
6
8
9
10
23
22
21
20
18
17
16
15
14
TC
12
13
PE
CEP
CET
CP
V
=Pin 19
GND=Pin 7
SF00835
LOGIC SYMBOL (IEEE/IEC)
SF00836
&
G5
EN6
24
M1[LOAD]
M2[COUNT]
M3[UP]
23
22
21
20
18
17
16
15
M4[DOWN]
1
13
12
11
2, 3, 5, 6 +/C7
2, 4, 5, 6–
[1]
[2]
[4]
[8]
[16]
[32]
[64]
[128]
3, 5, 6 CT=256
4, 5, 8 CT=0
14
2
3
4
5
6
8
9
10
CTR DIV 256
1, 7D
APPLICATION
U/D
CP
Q
0
Q1 Q2 Q3 Q4 Q5 Q6 Q7
P0 P1 P2 P3 P4 P5 P6 P7
PE
TC
CEP
CET
SF00851
U/D
CP
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
P0 P1 P2 P3 P4 P5 P6 P7
PE
TC
CEP
CET
U/D
CP
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
P0 P1 P2 P3 P4 P5 P6 P7
PE
TC
CEP
CET
U/D
CP
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
P0 P1 P2 P3 P4 P5 P6 P7
PE
TC
CEP
CET
Most significant 8-bit counter
Least significant 8-bit counter
CP
U/D
PE
Figure 1. Synchronous Multistage Counting Scheme
MODE SELECT FUNCTION TABLE
INPUTS
OUTPUTS
Q
n
L
H
Count Up
Count Down
q
n
q
n
OPERATING MODE
CP
↑
↑
↑
↑
↑
↑
U/D
X
X
h
l
X
X
CEP
X
X
l
l
h
X
CET
X
X
l
l
l
h
PE
l
l
h
h
h
h
P
n
l
h
X
X
X
X
TC
(a)
(a)
(a)
(a)
(a)
H
Parallel load
Count Up
Count Down
Hold (do nothing)
H = High voltage level
h = High voltage level one setup prior to the Low-to-High clock transition
L = Low voltage level
l
= Low voltage level one setup time prior to the Low-to-High clock transition
q = Lower case letters indicate the state of the referenced output prior to the Low-to-High clock transition
X = Don’t care
↑
= Low-to-High clock transition
(a)= TC is Low when CET is Low and the counter is at Terminal Count. Terminal Count Up is with all Q
n
outputs High and Terminal Count
Down is with all Qn outputs Low.
相關(guān)PDF資料
PDF描述
74F269SC 8-Bit Bidirectional Binary Counter
74F269SCX Synchronous Up/Down Counter
74F269SPC 8-Bit Bidirectional Binary Counter
74F273A CABLE ASSEMBLY, DVI TO HDMI, 15M; Connector type A:DVI; Connector type B:HDMI; Length, lead:15m; Cable type:Multicore HDMI RoHS Compliant: Yes
74F273AD CABLE ASSEMBLY, HDMI TO HDMI, 10M; Connector type A:HDMI; Connector type B:HDMI; Length, lead:10m; Cable type:HDMI RoHS Compliant: Yes
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
74F269_07 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:8-Bit Bidirectional Binary Counter
74F269_ZBH3026B WAF 制造商:Fairchild Semiconductor Corporation 功能描述:
74F269N 制造商:NXP Semiconductors 功能描述:
74F269SC 功能描述:計(jì)數(shù)器移位寄存器 8-Bit Bidir Bin Ctr RoHS:否 制造商:Texas Instruments 計(jì)數(shù)器類型: 計(jì)數(shù)順序:Serial to Serial/Parallel 電路數(shù)量:1 封裝 / 箱體:SOIC-20 Wide 邏輯系列: 邏輯類型: 輸入線路數(shù)量:1 輸出類型:Open Drain 傳播延遲時(shí)間:650 ns 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝:Reel
74F269SC 制造商:Fairchild Semiconductor Corporation 功能描述:COUNTER LOGIC IC ((NW))
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