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74ALS377DB Scheda tecnica(PDF) 2 Page - NXP Semiconductors

Il numero della parte 74ALS377DB
Spiegazioni elettronici  Octal D flip-flop with enable
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Produttore elettronici  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74ALS377DB Scheda tecnica(HTML) 2 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
74ALS377
Octal D flip-flop with enable
2
1991 Feb 08
853–1399 01670
FEATURES
Ideal for addressable register applications
Enable for address and data synchronization applications
Eight edge-triggered D-type flip-flops
Buffered common clock
See 74ALS273 for master reset version
See 74ALS373 for transparent latch version
See 74ALS374 for 3-State version
DESCRIPTION
The 74ALS377 has eight edge-triggered D-type flip-flops with
individual D inputs and Q outputs. The common buffered clock (CP)
input loads all flip-flops simultaneously when the Enable (E) is Low.
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. The E input must be stable
one setup time prior to the Low-to-High clock transition for
predictable operation.
TYPE
TYPICAL fMAX
TYPICAL
SUPPLY CURRENT
(TOTAL)
74ALS377
95MHz
15mA
PIN CONFIGURATION
20
19
18
17
16
15
14
13
12
10
11
9
8
7
6
5
4
3
2
1
VCC
Q7
D7
D6
Q6
Q5
D5
D4
Q4
CP
Q0
D0
D1
Q1
Q2
D2
D3
Q3
GND
E
SF00350
ORDERING INFORMATION
ORDER CODE
DESCRIPTION
COMMERCIAL RANGE
VCC = 5V ±10%,
Tamb = 0°C to +70°C
DRAWING
NUMBER
20-pin plastic DIP
74ALS377N
SOT146-1
20-pin plastic SOL
74ALS377D
SOT163-1
20-pin plastic SSOP
Type II
74ALS377DB
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
E
Latch enable input
1.0/1.0
20
µA/0.1mA
Q0 – Q7
Data 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
SF00351
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
E
CP
VCC = Pin 20
GND = Pin 10
IEC/IEEE SYMBOL
SF00352
1
32
4
5
7
6
8
9
G1
11
1C2
13
12
14
15
17
16
18
19
2D


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