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QUAD BUS BUFFERS (3-STATE)
■ HIGH SPEED: t
■ LOWPOWER DISSIPATION:
=8µA (MAX.) at TA=25oC
I
CC
■ COMPATIBLEWITHTTLOUTPUTS
V
=2V(MIN),VIL= 0.8V (MAX)
IH
■ 50Ω TRANSMISSION LINE DRIVING
CAPABILITY
■ SYMMETRICAL OUTPUT IMPEDANCE:
|I
|=IOL=24 mA (MIN)
OH
■ BALANCEDPROPAGATIONDELAY S:
t
≅ t
PLH
PHL
■ OPERATINGVOLTAGERAN GE:
V
(OPR)= 4.5V to 5.5V
CC
■ PIN AND FUNCTION COMPATIBLEWITH
74SERIES125
■ IMPROVED LATCH-UP IMMUNITY
DESCRIPTION
The ACT125 is an high-speedCMOSQUAD BUS
BUFFERS fabricated with sub-micron silicongate
and double-layer metal wiring C
technology. It is ideal for low power applications
maintaining high speed operation similar to
= 6.5 ns (TYP.) at VCC=5V
PD
2
MOS
74ACT125
PRELIMINARY DATA
B
(Plastic Package)
(Micro Package)
ORDERCODES:
74ACT125B 74ACT125M
equivalentBipolarSchottky TTL.
These devices require the same 3-STATEcontrol
input G to be taken high to make the output go in
to the high impedancestate.
The device is designed to interface directly High
Speed CMOS systems with TTL, NMOS and
CMOSoutput voltage levels.
All inputs and outputs are equipped with
protectioncircuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
M
PINCONNECTION AND IEC LOGIC SYMBOLS
May 1997
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74ACT125
INPUTAND OUTPUTEQUIVALENTCIRCUIT
PIN DESCRIPTION
PI N No SYM B O L NAME AN D FUNCT I ON
1, 4, 10, 13 G1 to G4 Output Enable Inputs
2, 5, 9, 12 A1 to A4 Data Inputs
3, 6, 8, 11 Y1 to Y4 Data Outputs
7 GND Ground (0V)
14 V
CC
Positive Supply Voltage
TRUTHTABLE
AGY
XHZ
LLL
HLH
ABSOLUTE MAXIMUM RATINGS
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 isnot 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 ± 200 mA
GND
Storage Temperature -65 to +150
stg
Lead Temperature (10 sec) 300
L
o
C
o
C
RECOMMENDED OPERATINGCONDITIONS
Symbol Parameter Valu e Unit
V
V
V
T
dt/dv Input Rise and Fall Time V
1) VINfrom0.8V to2.0V
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Supply Voltage 4.5 to 5.5 V
CC
Input Voltage 0 to V
I
Output Voltage 0 to V
O
Operating Temperature: -40 to +85
op
= 4.5 to 5.5V (note 1) 8 ns/V
CC
CC
CC
V
V
o
C
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DC SPECIFICATIONS
74ACT125
Symbol Parameter Test Condition s Value Unit
T
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
3 State Output Leakage
I
OZ
5.5
5.5 VI=VIHor V
Current
Max ICC/Input 5.5 VI=VCC-2.1 V 0.6 1.5 mA
I
CCT
Quiescent Supply
I
CC
5.5 VI=VCCor GND 8 80 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
VO=VCCor GND
IL
=25oC-40to85
A
Min. Typ. Ma x. Min. Max.
2.0 1.5 2.0
1.5 0.8 0.8
±0.5 ±5 µA
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
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