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N74F269N PDF даташит

Спецификация N74F269N изготовлена ​​​​«Philips» и имеет функцию, называемую «8-bit bidirectional binary counter».

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Номер произв N74F269N
Описание 8-bit bidirectional binary counter
Производители Philips
логотип Philips логотип 

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N74F269N Даташит, Описание, Даташиты
INTEGRATED CIRCUITS
74F269
8-bit bidirectional binary counter
Product specification
IC15 Data Handbook
1996 Jan 05
Philips
Semiconductors









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N74F269N Даташит, Описание, Даташиты
Philips Semiconductors
8–bit bidirectional binary counter
Product specification
74F269
FEATURES
Synchronous counting and loading
Built-in look-ahead carry capability
Count frequency 115MHz typ
Supply current 95mA typ
DESCRIPTION
The 74F269 is a fully synchronous 8-stage Up/Down Counter
featuring a preset capability for programmable operation, carry
look-ahead for easy cascading and a U/D input to control the
direction of counting. All state changes, whether in counting or
parallel loading, are initiated by the rising edge of the clock.
TYPE
74F269
TYPICAL fMAX
115MHz
TYPICAL
SUPPLY CURRENT
(TOTAL)
95mA
PIN CONFIGURATION
U/D 1
Q0 2
Q1 3
Q2 4
Q3 5
Q4 6
GND 7
Q5 8
Q6 9
Q7 10
CP 11
CEP 12
24 PE
23 P0
22 P1
21 P2
20 P3
19 VCC
18 P4
17 P5
16 P6
15 P7
14 TC
13 CET
SF00834
ORDERING INFORMATION
DESCRIPTION
24-Pin Plastic Slim DIP (300mil)
24-Pin Plastic SOL
24-Pin Plastic SSOP type II
COMMERCIAL RANGE
VCC = 5V ±10%, Tamb = 0°C to +70°C
N74F269N
N74F269D
N74F269DB
PKG DWG #
SOT222-1
SOT137-1
SOT340-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
P0 - P7
Parallel Data inputs
PE Parallel Enable input (active Low)
U/D Up/Down count control input
CEP
Count Enable Parallel input (active Low)
CET
Count Enable Trickle input (active Low)
CP Clock input
TC Terminal Count output (active Low)
Q0 - Q7
Flip-flop outputs
NOTE:
One (1.0) FAST Unit Load is defined as: 20µA in the High state and 0.6mA in the Low state.
74F(U.L.)
HIGH/LOW
1.0/1.0
1.0/1.0
1.0/1.0
1.0/1.0
1.0/1.0
1.0/1.0
50/33
50/33
LOAD VALUE
HIGH/LOW
20µA/0.6mA
20µA/0.6mA
20µA/0.6mA
20µA/0.6mA
20µA/0.6mA
20µA/0.6mA
1.0mA/20mA
1.0mA/20mA
1996 Jan 05
2 853–0056 16186









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N74F269N Даташит, Описание, Даташиты
Philips Semiconductors
8–bit bidirectional binary counter
Product specification
74F269
LOGIC SYMBOL
23 22 21 20 18 17 16 15
P0 P1 P2 P3 P4 P5 P6 P7
24 PE
1 U/D
12 CEP
13 CET
TC 14
11 CP
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
2 3 4 5 6 8 9 10
VCC=Pin 19
GND=Pin 7
SF00835
LOGIC SYMBOL (IEEE/IEC)
CTR DIV 256
24 M1[LOAD]
M2[COUNT]
1 M3[UP]
M4[DOWN]
12
&
13 G5
EN6
11
2, 3, 5, 6 +/C7
2, 4, 5, 6–
23
1, 7D [1]
22 [2]
21 [4]
20
[8]
18
[16]
17
[32]
16 [64]
15 [128]
3, 5, 6 CT=256
4, 5, 8 CT=0
2
3
4
5
6
8
9
10
14
SF00836
APPLICATION
CP
U/D
PE
P0 P1 P2 P3 P4 P5 P6 P7
PE
U/D
CP
CEP
TC
CET
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
P0 P1 P2 P3 P4 P5 P6 P7
PE
U/D
CP
CEP
TC
CET
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
P0 P1 P2 P3 P4 P5 P6 P7
PE
U/D
CP
CEP
TC
CET
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
P0 P1 P2 P3 P4 P5 P6 P7
PE
U/D
CP
CEP
TC
CET
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
Least significant 8-bit counter
Figure 1. Synchronous Multistage Counting Scheme
Most significant 8-bit counter
SF00851
MODE SELECT FUNCTION TABLE
INPUTS
CP U/D CEP CET PE
XXX
l
XXX
l
Pn
l
h
OUTPUTS
Qn
L
H
TC
(a)
(a)
OPERATING MODE
Parallel load
h l
l
h
X
Count Up
(a) Count Up
l
l
l
h
X
Count Down
(a) Count Down
Xh l hX
XXh hX
qn
(a)
Hold (do nothing)
qn H
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 Qn outputs High and Terminal Count
Down is with all Qn outputs Low.
1996 Jan 05
3










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