Philips
Semiconductors
74ALS273
Octal Dtype flipflop
Product specification
IC05 Data Handbook
1991 Feb 08
INTEGRATED CIRCUITS
Philips Semiconductors
Product specification
74ALS273
Octal D-type flip-flop
2
1991 Feb 08
8531398 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 f
MAX
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
V
CC
CP
SF00346
ORDERING INFORMATION
ORDER CODE
DESCRIPTION
COMMERCIAL RANGE
V
CC
= 5V
10%,
T
amb
= 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
A/0.2mA
CP
Clock pulse input (active rising edge)
1.0/1.0
20
A/0.1mA
MR
Master Reset input (active-Low)
1.0/1.0
20
A/0.1mA
Q0 Q7
3-State outputs
130/240
2.6mA/24mA
NOTE:
One (1.0) ALS unit load is defined as: 20
A 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
V
CC
= Pin 20
GND = Pin 10
SF00347
IEC/IEEE SYMBOL
SF00348
1
3
2
4
5
7
6
8
9
R
11
C1
13
12
14
15
17
16
18
19
1D
Philips Semiconductors
Product specification
74ALS273
Octal D-type flip-flop
1991 Feb 08
3
LOGIC DIAGRAM
D
Q
RD
Q0
2
V
CC
= Pin 20
GND = Pin 10
CP
D0
3
D
Q
RD
Q1
5
CP
D1
4
D
Q
RD
Q2
6
CP
D2
7
D
Q
RD
Q3
9
CP
D3
8
D
Q
RD
Q4
12
CP
D4
13
D
Q
RD
Q5
15
CP
D5
14
D
Q
RD
Q6
16
CP
D6
17
D
Q
RD
Q7
19
CP
D7
18
11
1
CP
MR
SF00349
FUNCTION TABLE
INPUTS
OUTPUTS
OPERATING MODE
MR
CP
Dn
Qn
OPERATING MODE
L
X
X
L
Reset (clear)
H
h
H
Load "1"
H
l
L
Load "0"
H = High-voltage level
h
= High state must be present one setup time before the Low-to-High clock transition
L
= Low-voltage level
l
= Low state must be present one setup time before the Low-to-High clock transition
X = Don't care
= Low-to-High clock transition
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limit set forth in this table may impair the useful life of the device.
Unless otherwise noted these limits are over the operating free air temperature range.)
SYMBOL
PARAMETER
RATING
UNIT
V
CC
Supply voltage
0.5 to +7.0
V
V
IN
Input voltage
0.5 to +7.0
V
I
IN
Input current
30 to +5
mA
V
OUT
Voltage applied to output in High output state
0.5 to V
CC
V
I
OUT
Current applied to output in Low output state
48
mA
T
amb
Operating free-air temperature range
0 to +70
C
T
stg
Storage temperature range
65 to +150
C
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
LIMITS
UNIT
SYMBOL
PARAMETER
MIN
NOM
MAX
UNIT
V
CC
Supply voltage
4.5
5.0
5.5
V
V
IH
High-level input voltage
2.0
V
V
IL
Low-level input voltage
0.8
V
I
IK
Input clamp current
18
mA
I
OH
High-level output current
2.6
mA
I
OL
Low-level output current
24
mA
T
amb
Operating free-air temperature range
0
+70
C
Philips Semiconductors
Product specification
74ALS273
Octal D-type flip-flop
1991 Feb 08
4
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
PARAMETER
TEST CONDITIONS
1
LIMITS
UNIT
SYMBOL
PARAMETER
TEST CONDITIONS
1
MIN
TYP
2
MAX
UNIT
V
O
High level output voltage
V
CC
10%, V
IL
= MAX,
I
OH
= 0.4mA
V
CC
2
V
V
OH
High-level output voltage
CC
,
IL
,
V
IH
= MIN
I
OH
= MAX
2.4
3.2
V
V
O
Low level output voltage
V
CC
= MIN, V
IL
= MAX,
I
OL
= 12mA
0.25
0.40
V
V
OL
Low-level output voltage
CC
,
IL
,
V
IH
= MIN
I
OL
= 24mA
0.35
0.50
V
V
IK
Input clamp voltage
V
CC
= MIN, I
I
= I
IK
0.73
1.5
V
I
I
Input current at maximum input voltage
V
CC
= MAX, V
I
= 7.0V
0.1
mA
I
IH
High-level input current
V
CC
= MAX, V
I
= 2.7V
20
A
I
Low level input current
MR, CP
V
CC
= MAX V = 0 4V
0.1
mA
I
IL
Low-level input current
Dn
V
CC
= MAX, V
I
= 0.4V
0.2
mA
I
O
Output current
3
V
CC
= MAX, V
O
= 2.25V
30
112
mA
I
CC
Supply current (total)
I
CCH
V
CC
= MAX
12
18
mA
I
CC
Supply current (total)
I
CCL
V
CC
= MAX
21
29
mA
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.
2. All typical values are at V
CC
= 5V, T
amb
= 25
C.
3. The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, I
OS
.
AC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL
PARAMETER
TEST CONDITION
T
amb
= 0
C to +70
C
V
CC
= +5.0V
10%
C
L
= 50pF, R
L
= 500
UNIT
MIN
MAX
f
MAX
Maximum clock frequency
Waveform 1
65
MHz
t
PLH
t
PHL
Propagation delay
CP to Qn
Waveform 1
2.0
3.0
8.0
11.0
ns
t
PHL
Propagation delay
MR to Qn
Waveform 2
4.0
12.0
ns
AC SETUP REQUIREMENTS
LIMITS
SYMBOL
PARAMETER
TEST CONDITION
T
amb
= 0
C to +70
C
V
CC
= +5.0V
10%
C
L
= 50pF, R
L
= 500
UNIT
MIN
MAX
t
su
(H)
t
su
(L)
Setup time, High or Low
Dn to CP
Waveform 3
5.0
5.0
ns
t
h
(H)
t
h
(L)
Hold time, High or Low
Dn to CP
Waveform 3
0.0
0.0
ns
t
w
(H)
t
w
(L)
CP pulse width,
High or Low
Waveform 1
6.0
8.0
ns
t
w
(L)
MR pulse width, Low
Waveform 2
7.0
ns
t
REC
Recovery time,
MR to CP
Waveform 2
12.0
ns
Philips Semiconductors
Product specification
74ALS273
Octal D-type flip-flop
1991 Feb 08
5
AC WAVEFORMS
For all waveforms, V
M
= 1.3V.
CP
V
M
V
M
V
M
t
w
(H)
1/f
max
V
M
V
M
t
PLH
t
w
(L)
t
PHL
Qn
SF00294
Waveform 1.
Propagation Delay for Clock Input to Output,
Clock Pulse Width, and Maximum Clock Frequency
V
M
SC00065
MR
Qn
V
M
t
w
(L)
t
PHL
V
M
t
REC
CP
V
M
Waveform 2.
Master Reset Pulse Width, Master Reset to
Output Delay, and Master Reset to Clock Recovery Time
t
h
(H)
t
su
(H)
CP
SC00064
V
M
V
M
V
M
V
M
V
M
V
M
t
h
(L)
t
su
(L)
Dn
Waveform 3.
Data Setup and Hold Times
TEST CIRCUIT AND WAVEFORMS
tw
90%
VM
10%
90%
VM
10%
90%
VM
10%
90%
VM
10%
NEGATIVE
PULSE
POSITIVE
PULSE
tw
AMP (V)
0.3V
0.3V
tTHL (tf
f
)
INPUT PULSE REQUIREMENTS
Rep.Rate
t
w
t
TLH
t
THL
1MHz
500ns
2.0ns
2.0ns
Input Pulse Definition
VCC
Family
74ALS
D.U.T.
PULSE
GENERATOR
RL
CL
RT
VIN
VOUT
Test Circuit for Totem-pole Outputs
DEFINITIONS:
R
L
= Load resistor;
see AC electrical characteristics for value.
C
L
= Load capacitance includes jig and probe capacitance;
see AC electrical characteristics for value.
R
T
= Termination resistance should be equal to Z
OUT
of
pulse generators.
tTHL (tf
)
tTLH (tr
)
tTLH (tr
)
AMP (V)
Amplitude
3.5V
1.3V
V
M
SC00005
Philips Semiconductors
Product specification
74ALS273
Octal Dtype flipflop
1991 Feb 08
6
DIP20:
plastic dual in-line package; 20 leads (300 mil)
SOT146-1
Philips Semiconductors
Product specification
74ALS273
Octal Dtype flipflop
1991 Feb 08
7
SO20:
plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
Philips Semiconductors
Product specification
74ALS273
Octal Dtype flipflop
1991 Feb 08
8
SSOP20:
plastic shrink small outline package; 20 leads; body width 5.3 mm
SOT339-1
Philips Semiconductors
Product specification
74ALS273
Octal Dtype flipflop
1991 Feb 08
9
Philips Semiconductors and Philips Electronics North America Corporation reserve the right to make changes, without notice, in the products,
including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips
Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright,
or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask
work right infringement, unless otherwise specified. Applications that are described herein for any of these products are for illustrative purposes
only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing
or modification.
LIFE SUPPORT APPLICATIONS
Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices,
or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected
to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips
Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully
indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale.
This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips
Semiconductors reserves the right to make changes at any time without notice in order to improve design
and supply the best possible product.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 940883409
Telephone 800-234-7381
DEFINITIONS
Data Sheet Identification
Product Status
Definition
Objective Specification
Preliminary Specification
Product Specification
Formative or in Design
Preproduction Product
Full Production
This data sheet contains the design target or goal specifications for product development. Specifications
may change in any manner without notice.
This data sheet contains Final Specifications. Philips Semiconductors reserves the right to make changes
at any time without notice, in order to improve design and supply the best possible product.
Copyright Philips Electronics North America Corporation 1997
All rights reserved. Printed in U.S.A.
Philips
Semiconductors
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