Page 1
■ HIGH SPEED:t
■ LOWPOWERDISSIPATION:
=4µA (MAX.) at TA=25oC
I
CC
■ COMPATIBLEWITH TTL OUTPUT S
V
=2V(MIN),VIL= 0.8V (MAX)
IH
■ 50Ω TRANSMISSION LINE DRIVING
= 6.5 ns (TYP.)at VCC=5V
PD
CAPABILITY
■ SYMMETRICAL OUTPUT IMPEDANCE:
|I
|=IOL=24 mA (MIN)
OH
■ BALANCEDPROPAGATIONDELAYS:
t
≅ t
PLH
PHL
■ OPERATINGVOLTAGERANGE:
V
(OPR)= 4.5V to 5.5V
CC
■ PIN AND FUNCTION COMPATIBLE WITH
74SERIES20
■ IMPROVED LATCH-UPIMMUNITY
DESCRIPTION
The ACT20 is an advanced high-speed CMOS
DUAL 4-INPUT NAND GATE fabricated with
sub-micron silicon gate and double-layer metal
wiring C
2
MOS technology. It is ideal for low
power applications mantaining high speed
74ACT20
DUAL 4-INPUT NAND GATE
PRELIMINARY DATA
B
(Plastic Package)
(Micro Package)
ORDERCODES:
74ACT20B 74ACT20M
operation similar to equivalent Bipolar Schottky
TTL.
The internal circuit is composed of 3 stages
including buffer output, which enables high noise
immunityand stable output.
The device is designed to interface directly High
Speed CMOS systems with TTL, NMOS and
CMOSoutput voltagelevels.
All inputs and outputs are equipped with
protectioncircuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
M
PINCONNECTION ANDIEC LOGICSYMBOLS
May 1997
1/7
Page 2
74ACT20
INPUTAND OUTPUT EQUIVALENTCIRCUIT
PIN DESCRIPTION
PI N No SYM B O L NAME AN D FUNCT I ON
1, 9 1A to 2A Data Inputs
2, 10 1B to 2B Data Inputs
3, 11 1C to 2C Data Inputs
5, 13 1D to 2D Data Inputs
6, 8 1Y to 2Y Data Outputs
7 GND Ground (0V)
14 V
CC
Positive Supply Voltage
TRUTHTABLE
ABCCY
LXXXH
XLXXH
XXLXH
XXXLH
HHHHL
ABSOLUTE MAXIMUMRATINGS
Symb o l Parame t er Val u e Uni t
V
V
V
I
I
OK
I
orI
I
CC
T
T
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
Supply Voltage -0.5 to +7 V
CC
DC Input Voltage -0.5 to VCC+ 0.5 V
I
DC Output Voltage -0.5 to VCC+ 0.5 V
O
DC Input Diode Current ± 20 mA
IK
DC Output Diode Current ± 20 mA
DC Output Current ± 50 mA
O
DC VCCor Ground Current ± 100 mA
GND
Storage Temperature -65 to +150
stg
Lead Temperature (10 sec) 300
L
o
C
o
C
RECOMMENDEDOPERATINGCONDITIONS
Symbol Parameter Valu e Unit
V
V
V
T
dt/dv Input Rise and Fall Time V
1) VINfrom0.8Vto 2.0 V
2/7
Supply Voltage 4.5 to 5.5 V
CC
Input Voltage 0 to V
I
Output Voltage 0 to V
O
Operating Temperature: -40to +85
op
= 4.5 to 5.5V (note 1) 8 ns/V
CC
CC
CC
V
V
o
C
Page 3
DC SPECIFICATIONS
74ACT20
Symbol Parameter Test Condition s Value Unit
=25oC-40to85
V
CC
(V)
High Level Input Voltage 4.5 VO= 0.1 V or
V
IH
5.5 2.0 1.5 2.0
Low Level Input Voltage 4.5 VO= 0.1 V or
V
IL
5.5 1.5 0.8 0.8
High Level Output
V
OH
Voltage
4.5
5.5 I
4.5 I
5.5 I
Low Level Output
V
OL
Voltage
4.5
5.5 I
4.5 I
5.5 I
Input Leakage Current
I
I
Max ICC/Input 5.5 VI=VCC-2.1 V 0.6 1.5 mA
I
CCT
Quiescent Supply
I
CC
5.5
5.5 VI=VCCor GND 4 40 µA
V
- 0.1 V
CC
- 0.1 V
V
CC
IO=-50 µA 4.4 4.49 4.4
(*)
=
V
I
V
IH
V
IL
(*)
V
I
V
IH
V
IL
=-50 µA 5.4 5.49 5.4
O
or
=-24 mA 3.86 3.76
O
=-24 mA 4.86 4.76
O
IO=50 µA 0.001 0.1 0.1
=
=50 mA 0.001 0.1 0.1
O
or
=24 mA 0.36 0.44
O
=24 mA 0.36 0.44
O
VI=VCCor GND ±0.1 ±1 µA
T
A
Min. Typ. Max. Min . Max.
2.0 1.5 2.0
1.5 0.8 0.8
o
C
Current
Dynamic Output Current
I
OLD
OHD
(note 1, 2)
I
1) Maximum test duration 2ms, one output loaded at time
2) Incident wave switching is guaranteed on transmission lines with impedances as low as 50 Ω.
(*)All outputs loaded.
5.5 V
= 1.65 Vmax 75 mA
OLD
V
= 3.85 V min -75 mA
OHD
V
V
V
V
AC ELECTRICAL CHARACTERISTICS (CL= 50 pF, RL=500 Ω, Inputtr=tf=3ns)
Symbol Parameter Test Cond ition Value Unit
t
Propagation Delay Time 5.0
PLH
t
PHL
(*) Voltage rangeis5V±0.5V
V
(V)
CC
(*)
=25oC-40to85
T
A
Min. Typ. Max. Min . Max.
1.5 6.5 9.0 1.0 9.5 ns
o
C
CAPACITIVE CHARACTERISTICS
Symbol Parameter Test Condition s Value Unit
=25oC-40to85
T
A
Min. Typ. Max. Min . Max.
4.5
Input Capacitance
C
IN
Power Dissipation
C
PD
V
CC
(V)
5.0
5.0 25 pF
Capacitance (note 1)
1) CPDis defined as the value of the IC’s internalequivalent 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. I
(opr) =CPD• VCC• fIN+ICC/n (per circuit)
CC
o
C
pF
3/7
Page 4
74ACT20
TEST CIRCUIT
CL= 50 pF or equivalent (includes jig and probe capacitance)
= 500Ω or equivalent
R
L=R1
R
WAVEFORM: PROPAGATIONDELAYS (f=1MHz; 50%duty cycle)
of pulse generator (typically 50Ω)
T=ZOUT
4/7
Page 5
Plastic DIP-14 MECHANICAL DATA
74ACT20
DIM.
MIN. TYP. MAX. MIN. TYP. MAX.
a1 0.51 0.020
B 1.39 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 3.3 0.130
Z 1.27 2.54 0.050 0.100
mm inch
P001A
5/7
Page 6
74ACT20
SO-14 MECHANICAL DATA
DIM.
MIN. TYP. MAX. MIN. TYP. MAX.
A 1.75 0.068
a1 0.1 0.2 0.003 0.007
a2 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 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 0.68 0.026
S 8 (max.)
mm inch
6/7
P013G
Page 7
74ACT20
Information furnished is believed to be accurateand reliable.However,SGS-THOMSON Microelectronics assumes no responsability for the
consequencesof use ofsuch informationnor for any infringement of patentsor other rights of third parties whichmay resultsfrom its use. No
licenseis grantedby implicationor otherwise underany patent orpatentrights of SGS-THOMSON Microelectronics. Specificationsmentioned
in this publication are subject to change without notice. This publication supersedes and replaces all informationpreviouslysupplied.
SGS-THOMSONMicroelectronics productsarenotauthorized for useas criticalcomponents in life supportdevices orsystems withoutexpress
writtenapproval of SGS-THOMSON Microelectonics.
1997 SGS-THOMSONMicroelectronics - Printed in Italy- All Rights Reserved
Australia- Brazil - Canada - China- France- Germany- Hong Kong- Italy- Japan- Korea- Malaysia- Malta- Morocco- TheNetherlands -
Singapore- Spain- Sweden- Switzerland - Taiwan - Thailand - UnitedKingdom - U.S.A
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.
7/7
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