STMICROELECTRONICS 74ACT280M

74ACT280

9 BIT PARITY GENERATOR/CHECKER
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HIGH SPEED: tPD = 4 ns (TYP.) at VCC = 5V
LOW POWER DISSIPATION:
ICC = 4 µA (MAX.) at TA = 25 oC
COMPATIBLE WITH TTL OUTPUTS
VIH = 2V (MIN), VIL = 0.8V (MAX)
50Ω TRANSMISSION LINE DRIVING
CAPABILITY
SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 24 mA (MIN)
BALANCED PROPAGATION DELAYS:
tPLH ≅ tPHL
OPERATING VOLTAGE RANGE:
VCC (OPR) = 4.5V to 5.5V
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 280
IMPROVED LATCH-UP IMMUNITY
DESCRIPTION
The AC280 is an advanced high-speed CMOS 9
BIT PARITY GENERATOR - CHECKER
fabricated with sub-micron silicon gate and
double-layer metal wiring C2MOS technology. It is
ideal for low power applications mantaining high
speed operation similar to eqivalent Bipolar
Schottky TTL.
It is composed of nine data inputs (A to I) and
odd/even parity outputs (ΣODD and ΣEVEN). The
B
M
(Plastic Package)
(Micro Package)
ORDER CODES :
74ACT280B
74ACT280M
nine data inputs control the output conditions.
When the number of high level input is odd,
ΣODD output is kept high and ΣEVEN output low.
Conservely, when the output is even, ΣEVEN
output is kept high and ΣODD low.
The IC generates either odd or even parity
making it flexible application.
The word-length capability is easily expanded by
cascading.
The device is designed to interface directly High
Speed CMOS systems with TTL, NMOS and
CMOS output voltage levels.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
December 1998
1/8
74ACT280
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
SYMBOL
5, 6
ΣEVEN
ΣODD
8, 9, 10, 11,
12, 13, 1, 2,
4
A to I
NAME AND FUNCT ION
Parity Outputs
Data Inputs
3
NC
7
GND
No Connection
Ground (0V)
14
VCC
Positive Supply Voltage
TRUTH TABLE
NUMBER OF INPUT A TRHU I T HAT ARE HIGH
LOGIC DIAGRAM
2/8
OUTPUT
0, 2, 4, 6, 8
ΣEVEN
H
ΣODD
L
1, 3, 5, 7, 9
L
H
74ACT280
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
Parameter
Supply Voltage
Value
Unit
-0.5 to +7
V
VI
DC Input Voltage
-0.5 to VCC + 0.5
V
VO
DC Output Voltage
-0.5 to VCC + 0.5
V
IIK
DC Input Diode Current
± 20
mA
IOK
DC Output Diode Current
± 20
mA
IO
DC Output Current
± 50
mA
± 200
mA
ICC or IGND DC VCC or Ground Current
Tstg
Storage Temperature
TL
Lead Temperature (10 sec)
-65 to +150
o
300
o
C
C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
RECOMMENDED OPERATING CONDITIONS
Symbol
Value
Unit
Supply Voltage
4.5 to 5.5
V
VI
Input Voltage
0 to VCC
V
VO
Output Voltage
0 to VCC
VCC
Top
dt/dv
Parameter
Operating Temperature:
V
o
-40 to +85
Input Rise and Fall Time VCC = 4.5 to 5.5V (note 1)
C
8
ns/V
1) VIN from 0.8 V to 2.0 V
DC SPECIFICATIONS
Symb ol
Parameter
Test Co nditions
VIH
High Level Input Voltage
4.5
5.5
VIL
Low Level Input Voltage
4.5
5.5
VOH
High Level Output
Voltage
4.5
5.5
4.5
VO = 0.1 V or
VCC - 0.1 V
V I (* ) =
V IH or
V IL
Low Level Output
Voltage
4.5
5.5
4.5
5.5
V I (* ) =
V IH or
V IL
1.5
Max.
Min.
2.0
2.0
1.5
2.0
Max.
V
1.5
0.8
0.8
1.5
0.8
0.8
4.4
4.49
4.4
IO=-50 µA
5.4
5.49
5.4
IO=-24 mA
3.86
3.76
IO=-24 mA
4.86
4.76
IO=50 µA
0.001
0.1
0.1
0.001
0.1
0.1
IO=24 mA
0.36
0.44
IO=24 mA
0.36
0.44
V
±1
µA
1.5
mA
40
µA
VOLD = 1.65 V max
75
mA
VOHD = 3.85 V min
-75
mA
5.5
VI = VCC or GND
Max ICC /Input
5.5
VI = VCC -2.1 V
ICC
Quiescent Supply
Current
5.5
VI = VCC or GND
IOLD
Dynamic Output Current
(note 1, 2)
5.5
±0.1
V
V
IO=50 mA
Input Leakage Current
IOHD
T yp.
2.0
IO=-50 µA
ICCT
II
Un it
o
-40 to 85 C
Min.
VO = 0.1 V or
VCC - 0.1 V
5.5
VOL
Valu e
o
T A = 25 C
V CC
(V)
0.6
4
1) Maximum test duration 2ms, one output loaded attime
2) Incident wave switching is guaranteed on transmission lines with impedances as low as 50 Ω.
3/8
74ACT280
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 Ω, Input tr = tf =3 ns)
Symb ol
Parameter
T est Con ditio n
V CC
(V)
tPLH
tPHL
Propagation Delay Time
(Input - ΣODD, ΣEVEN)
5.0(*)
Valu e
T A = 25 oC
-40 to 85 o C
Min. T yp. Max. Min. Max.
3.0
8.5
13.0
2.0
14.5
Un it
Valu e
Un it
ns
(*) Voltage range is 5V ± 0.5V
CAPACITIVE CHARACTERISTICS
Symb ol
Parameter
Test Co nditions
V CC
(V)
o
T A = 25 C
Min.
T yp.
Max.
o
-40 to 85 C
Min.
Max.
C IN
Input Capacitance
5.0
4
pF
CPD
Power Dissipation
Capacitance (note 1)
5.0
75
pF
1) CPD isdefined as the value of the IC’sinternal equivalent capacitance which is calculated fromthe operating current consumption without load. (Referto
Test Circuit).Average operating current can be obtained by the following equation. ICC(opr) = CPD • VCC • fIN + ICC
TEST CIRCUIT
CL = 50 pF or equivalent (includes jigand probe capacitance)
RL = R1 = 500Ω orequivalent
RT = ZOUT of pulse generator (typically 50Ω)
4/8
74ACT280
WAVEFORM: PROPAGATION DELAYS (f=1MHz; 50% duty cycle)
5/8
74ACT280
Plastic DIP-14 MECHANICAL DATA
mm
DIM.
MIN.
a1
0.51
B
1.39
TYP.
inch
MAX.
MIN.
TYP.
MAX.
0.020
1.65
0.055
0.065
b
0.5
0.020
b1
0.25
0.010
D
20
0.787
E
8.5
0.335
e
2.54
0.100
e3
15.24
0.600
F
7.1
0.280
I
5.1
0.201
L
Z
3.3
1.27
0.130
2.54
0.050
0.100
P001A
6/8
74ACT280
SO-14 MECHANICAL DATA
mm
DIM.
MIN.
TYP.
A
a1
inch
MAX.
MIN.
TYP.
1.75
0.1
0.068
0.2
a2
MAX.
0.003
0.007
1.65
0.064
b
0.35
0.46
0.013
0.018
b1
0.19
0.25
0.007
0.010
C
0.5
0.019
c1
45 (typ.)
D
8.55
8.75
0.336
0.344
E
5.8
6.2
0.228
0.244
e
1.27
e3
0.050
7.62
0.300
F
3.8
4.0
0.149
0.157
G
4.6
5.3
0.181
0.208
L
0.5
1.27
0.019
0.050
M
S
0.68
0.026
8 (max.)
P013G
7/8
74ACT280
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is
granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are
subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products
are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
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 1998 STMicroelectronics – Printed in Italy – All Rights Reserved
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