ETC 74AC280MTR

74AC280
9 BIT PARITY GENERATOR
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HIGH SPEED: tPD = 6ns (TYP.) at VCC = 5V
LOW POWER DISSIPATION:
ICC = 4µA(MAX.) at TA=25°C
HIGH NOISE IMMUNITY:
VNIH = V NIL = 28 % VCC (MIN.)
50Ω TRANSMISSION LINE DRIVING
CAPABILITY
SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 24mA (MIN)
BALANCED PROPAGATION DELAYS:
tPLH ≅ tPHL
OPERATING VOLTAGE RANGE:
VCC (OPR) = 2V to 6V
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 280
IMPROVED LATCH-UP IMMUNITY
DESCRIPTION
The 74AC280 is an advanced high-speed CMOS
9 BIT PARITY GENERATOR fabricated with
sub-micron silicon gate and double-layer metal
wiring C2MOS tecnology.
It is composed of nine data inputs (A to I) and odd/
even parity outputs (ΣODD and ΣEVEN). The 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.
DIP
SOP
TSSOP
ORDER CODES
PACKAGE
TUBE
DIP
SOP
TSSOP
74AC280B
74AC280M
T&R
74AC280MTR
74AC280TTR
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
easly expanded by cascading.
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
April 2001
1/10
74AC280
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
5, 6
8, 9, 10, 11,
12, 13, 1, 2,
4
3
7
14
SYMBOL
NAME AND FUNCTION
ΣEVEN
Parity Outputs
ΣΟDD
A to I
Data Inputs
NC
GND
VCC
No Connection
Ground (0V)
Positive Supply Voltage
TRUTH TABLE
OUTPUTS
NUMBER OF INPUTS A - I THAT ARE HIGH
0, 2, 4, 6, 8
1, 3, 5, 7, 9
LOGIC DIAGRAM
2/10
ΣEVEN
ΣODD
H
L
L
H
74AC280
ABSOLUTE MAXIMUM RATINGS
Symbol
V CC
Parameter
Supply Voltage
Value
Unit
-0.5 to +7
V
-0.5 to VCC + 0.5
-0.5 to VCC + 0.5
V
DC Input Diode Current
± 20
mA
IOK
DC Output Diode Current
± 20
mA
IO
DC Output Current
VI
DC Input Voltage
VO
DC Output Voltage
IIK
ICC or IGND DC VCC or Ground Current
Tstg
Storage Temperature
TL
Lead Temperature (10 sec)
V
± 50
mA
± 200
mA
-65 to +150
°C
300
°C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied.
RECOMMENDED OPERATING CONDITIONS
Symbol
V CC
Parameter
Supply Voltage
Value
Unit
2 to 6
V
VI
Input Voltage
0 to VCC
V
VO
Output Voltage
0 to VCC
V
Top
Operating Temperature
-55 to 125
°C
8
ns/V
dt/dv
Input Rise and Fall Time VCC = 3.0, 4.5 or 5.5V (note 1)
1) VIN from 30% to 70% of VCC
3/10
74AC280
DC SPECIFICATIONS
Test Condition
Symbol
VIH
V IL
VOH
VOL
II
ICC
IOLD
IOHD
Parameter
High Level Input
Voltage
Low Level Input
Voltage
High Level Output
Voltage
Low Level Output
Voltage
Input Leakage
Current
Quiescent Supply
Current
Dynamic Output
Current (note 1, 2)
Value
TA = 25°C
VCC
(V)
3.0
4.5
5.5
3.0
4.5
5.5
VO = 0.1 V or
VCC-0.1V
Min.
Typ.
2.1
3.15
3.85
1.5
2.25
2.75
1.5
2.25
2.75
VO = 0.1 V or
VCC-0.1V
Max.
-40 to 85°C
-55 to 125°C
Min.
Min.
Max.
2.1
3.15
3.85
0.9
1.35
1.65
Max.
2.1
3.15
3.85
0.9
1.35
1.65
V
0.9
1.35
1.65
3.0
IO=-50 µA
2.9
2.99
2.9
2.9
4.5
IO=-50 µA
4.4
4.49
4.4
4.4
5.49
Unit
V
5.5
IO=-50 µA
5.4
5.4
5.4
3.0
IO =-12 mA
2.56
2.46
2.4
4.5
IO =-24 mA
3.86
3.76
3.7
5.5
IO =-24 mA
4.86
4.76
4.7
3.0
IO=50 µA
0.002
0.1
0.1
0.1
4.5
IO=50 µA
0.001
0.1
0.1
0.1
5.5
IO=50 µA
0.001
0.1
0.1
0.1
3.0
IO =12 mA
0.36
0.44
0.5
4.5
IO =24 mA
0.36
0.44
0.5
5.5
IO =24 mA
0.36
0.44
0.5
5.5
VI = VCC or GND
± 0.1
±1
±1
µA
5.5
VI = VCC or GND
4
40
80
µA
VOLD = 1.65 V max
75
50
mA
VOHD = 3.85 V min
-75
-50
mA
5.5
V
V
1) Maximum test duration 2ms, one output loaded at time
2) Incident wave switching is guaranteed on transmission lines with impedances as low as 50Ω
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 Ω, Input tr = tf = 3ns)
Test Condition
Symbol
Parameter
tPLH tPHL Propagation Delay
Time
(Input - ΣODD,
ΣEVEN)
(*) Voltage range is 3.3V ± 0.3V
(**) Voltage range is 5.0V ± 0.5V
4/10
VCC
(V)
Value
TA = 25°C
-40 to 85°C
-55 to 125°C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
3.3 (*)
1.5
8.0
17.0
1.0
18.5
1.0
18.5
5.0(**)
1.5
6.0
13.0
1.0
14.5
1.0
14.5
Unit
ns
74AC280
CAPACITIVE CHARACTERISTICS
Test Condition
Symbol
Parameter
TA = 25°C
VCC
(V)
CIN
Input Capacitance
5.0
C PD
Power Dissipation
Capacitance (note
1)
5.0
Value
Min.
fIN = 10MHz
Typ.
Max.
-40 to 85°C
-55 to 125°C
Min.
Min.
Max.
Unit
Max.
4
pF
65
pF
1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/n (per circuit)
TEST CIRCUIT
C L = 50pF or equivalent (includes jig and probe capacitance)
R L = R1 = 500Ω or equivalent
R T = ZOUT of pulse generator (typically 50Ω)
5/10
74AC280
WAVEFORM: PROPAGATION DELAYS (f=1MHz; 50% duty cycle)
6/10
74AC280
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
7/10
74AC280
SO-14 MECHANICAL DATA
mm
DIM.
MIN.
TYP.
A
a1
inch
MAX.
MIN.
TYP.
1.75
0.1
0.2
a2
MAX.
0.068
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
0.050
e3
7.62
0.300
F
3.8
G
L
M
S
4.0
0.149
0.157
4.6
5.3
0.181
0.208
0.5
1.27
0.019
0.050
0.68
0.026
8 (max.)
P013G
8/10
74AC280
TSSOP14 MECHANICAL DATA
mm
DIM.
MIN.
inch
TYP.
A
MAX.
MIN.
TYP.
MAX.
1.1
0.433
A1
0.05
0.10
0.15
0.002
0.004
0.006
A2
0.85
0.9
0.95
0.335
0.354
0.374
b
0.19
0.30
0.0075
0.0118
c
0.09
0.20
0.0035
0.0079
D
4.9
5
5.1
0.193
0.197
0.201
E
6.25
6.4
6.5
0.246
0.252
0.256
E1
4.3
4.4
4.48
0.169
0.173
0.176
e
0.65 BSC
0.0256 BSC
K
0o
4o
8o
0o
4o
8o
L
0.50
0.60
0.70
0.020
0.024
0.028
A
A2
A1
b
e
K
c
L
E
D
E1
PIN 1 IDENTIFICATION
1
9/10
74AC280
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consequences of use of such information nor for any infringe ment of patents or other righ ts 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. Specifications
mentioned in this pub lication are subject to change without notice. Thi s pub lication supersedes and replaces all information
previously supplied. STMicroelectronics prod ucts are not authori zed for use as critical components in life suppo rt devices or
systems without express written approval of STMicroelectronics.
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