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參數(shù)資料
| 型號： | 935242010118 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 計數(shù)器 |
| 英文描述： | F/FAST SERIES, SYN POSITIVE EDGE TRIGGERED 8-BIT BIDIRECTIONAL BINARY COUNTER, PDSO24 |
| 封裝： | PLASTIC, SSOP-24 |
| 文件頁數(shù)： | 2/5頁 |
| 文件大?。?/td> | 128K |
| 代理商： | 935242010118 |
Philips Semiconductors
Product specification
74F269
8–bit bidirectional binary counter
2
1996 Jan 05
853–0056 16186
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
TYPICAL fMAX
TYPICAL
SUPPLY CURRENT
(TOTAL)
74F269
115MHz
95mA
PIN CONFIGURATION
24
23
22
21
20
19
18
17
16
15
14
13
12
10
11
9
8
7
6
5
4
3
2
1
U/D
CEP
CET
TC
PE
P0
P1
P2
P3
VCC
P4
P5
P6
P7
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
CP
GND
SF00834
ORDERING INFORMATION
DESCRIPTION
COMMERCIAL RANGE
VCC = 5V ±10%, Tamb = 0°C to +70°C
PKG DWG #
24-Pin Plastic Slim DIP (300mil)
N74F269N
SOT222-1
24-Pin Plastic SOL
N74F269D
SOT137-1
24-Pin Plastic SSOP type II
N74F269DB
SOT340-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
74F(U.L.)
HIGH/LOW
LOAD VALUE
HIGH/LOW
P0 - P7
Parallel Data inputs
1.0/1.0
20
A/0.6mA
PE
Parallel Enable input (active Low)
1.0/1.0
20
A/0.6mA
U/D
Up/Down count control input
1.0/1.0
20
A/0.6mA
CEP
Count Enable Parallel input (active Low)
1.0/1.0
20
A/0.6mA
CET
Count Enable Trickle input (active Low)
1.0/1.0
20
A/0.6mA
CP
Clock input
1.0/1.0
20
A/0.6mA
TC
Terminal Count output (active Low)
50/33
1.0mA/20mA
Q0 - Q7
Flip-flop outputs
50/33
1.0mA/20mA
NOTE:
One (1.0) FAST Unit Load is defined as: 20
A in the High state and 0.6mA in the Low state.
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