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74ALS273D データシート(PDF) 2 Page - NXP Semiconductors

部品番号 74ALS273D
部品情報  Octal D-type flip-flop
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メーカー  PHILIPS [NXP Semiconductors]
ホームページ  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74ALS273D データシート(HTML) 2 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
74ALS273
Octal D-type flip-flop
2
1991 Feb 08
853–1398 01670
FEATURES
Eight edge-triggered D-type flip-flops
Buffered common clock
Buffered asynchronous master reset
See 74ALS377 for clock enable version
See 74ALS373 for transparent latch version
See 74ALS374 for 3-State version
DESCRIPTION
The 74ALS273 has eight edge-triggered D-type flip-flops with
individual D inputs and Q outputs. The common buffered clock (CP)
and master reset (MR) inputs load and reset all flip-flops
simultaneously.
The register is fully edge-triggered. The state of each D input, one
setup time before the Low-to-High clock transition, is transferred to
the corresponding flip-flop’s Q output.
All outputs will be forced Low independently of clock or data inputs
by a Low voltage level on the MR input.
The device is useful for applications where the true output only is
required and the CP and MR are common to all flip-flops.
TYPE
TYPICAL fMAX
TYPICAL
SUPPLY CURRENT
(TOTAL)
74ALS273
95MHz
16mA
PIN CONFIGURATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
MR
Q0
D0
D1
Q1
Q2
D2
D3
Q3
Q4
GND
D4
D5
Q5
Q6
D6
D7
Q7
VCC
CP
SF00346
ORDERING INFORMATION
ORDER CODE
DESCRIPTION
COMMERCIAL RANGE
VCC = 5V ±10%,
Tamb = 0°C to +70°C
DRAWING
NUMBER
20-pin plastic DIP
74ALS273N
SOT146-1
20-pin plastic SO
74ALS273D
SOT163-1
20-pin plastic SSOP
Type II
74ALS273DB
SOT339-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
74ALS (U.L.)
HIGH/LOW
LOAD VALUE
HIGH/LOW
D0 – D7
Data inputs
1.0/2.0
20
µA/0.2mA
CP
Clock pulse input (active rising edge)
1.0/1.0
20
µA/0.1mA
MR
Master Reset input (active-Low)
1.0/1.0
20
µA/0.1mA
Q0 – Q7
3-State outputs
130/240
2.6mA/24mA
NOTE:
One (1.0) ALS unit load is defined as: 20
µA in the High state and 0.1mA in the Low state.
LOGIC SYMBOL
3
4
7
8
13
14
18
17
D0
D1
D2
D3
D4
D5
D6
D7
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
2
5
6
9
12
15
16
19
1
11
MR
CP
VCC = Pin 20
GND = Pin 10
SF00347
IEC/IEEE SYMBOL
SF00348
1
32
4
5
7
6
8
9
R
11
C1
13
12
14
15
17
16
18
19
1D


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