Datasheet

UNISONIC TECHNOLOGIES CO., LTD
U74ACT240
CMOS IC
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
„
DESCRIPTION
The U74ACT240 is a octal buffers/drivers with 3-state outputs. It
is organized as two 4-bit buffers/drivers with separate output-enable
( OE ) inputs. When OE is high, the Y outputs are in a
high-impedance state, and the outputs neither load nor drive the bus
lines. When OE is low, the device passes inverted data from the a
inputs to the Y outputs.
The U74ACT240 is designed to improve the performance and
density of 3-state memory address drivers, clock drivers, and
bus-oriented receivers and transmitters.
To ensure the high-impedance state during power up or power
down, OE should be tied to VCC through a pull-up resistor; the
minimum value of the resistor is determined by the current-sinking
capability of the driver.
„
TSSOP-20
FEATURES
* 4.5V to 5.5V VCC operation
* Inputs accept voltages to 5.5V
* Max tpd of 8.5 ns from A to Y at 5V
* Low power consumption, ICC = 4 μA (Max.) at 5.5V
* TTL compatible
* ±24 mA output driver at 5.5V
„
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
U74ACT240L-P20-R
U74ACT240G- P20-R
U74ACT240L- P20-T
U74ACT240G- P20-T
www.unisonic.com.tw
Copyright © 2012 Unisonic Technologies Co., Ltd
Package
Packing
TSSOP-20
TSSOP-20
Tape Reel
Tube
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U74ACT240
CMOS IC
„
PIN CONFIGURATION
„
FUNCTION TABLE (each buffer)
INPUTS
OE
L
L
H
„
OUTPUT
Y
L
L
H
A
H
L
X
LOGIC SYMBOL (positive logic)
1OE
1A1
1A2
1A3
1A4
1
2OE
2
18
4
16
6
14
8
12
1Y1
2A1
1Y2
2A2
1Y3
2A3
1Y4
2A4
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
19
11
9
13
7
15
5
17
3
2Y1
2Y2
2Y3
2Y4
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U74ACT240
„
CMOS IC
ABSOLUTE MAXIMUM RATING (TA =25°C , unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
Supply Voltage
VCC
-0.5~7
V
Input Voltage
VIN
-0.5~ VCC +0.5
V
Output Voltage
VOUT
-0.5~ VCC +0.5
V
Input Clamp Current (VIN<0, or VIN>VCC)
IIK
±20
mA
Output Clamp Current (VOUT<0, or VOUT>VCC)
IOK
±20
mA
Output Current
IOUT
±50
mA
VCC or GND Current
ICC
±200
mA
Storage Temperature
TSTG
-65 ~ +150
°C
Notes: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
„
THERMAL DATA
PARAMETER
Junction to Ambient
„
SYMBOL
θJA
UNIT
°C/W
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Supply Voltage
High-Level Input Voltage
Low-Level Input Voltage
Input Voltage
Output Voltage
High-level Output Current
Low-level Output Current
Input Transition Rise or Fall Rate
Operating Temperature
„
RATING
85
SYMBOL
VCC
VIH
VIL
VIN
VOUT
IOH
IOL
Δt/Δv
TA
MIN
4.5
2
0
0
0
-40
MAX
5.5
UNIT
V
V
V
V
V
mA
mA
ns/V
°C
0.8
VCC
VCC
-24
24
8
85
ELECTRICAL CHARACTERISTICS (TA =25°C , unless otherwise specified)
PARAMETER
SYMBOL
High-Level Output Voltage
VOH
Low-Level Output Voltage
VOL
Input Leakage Current
(A or OE inputs)
II(LEAK)
High-impedance state Current
IOZ
Quiescent Supply Current
ICC
Additional quiescent Supply Current
Δ ICC
Input Capacitance
Output Capacitance
CIN
COUT
TEST CONDITIONS
IOH = -50 μA, VCC = 4.5V
IOH = -50 μA, VCC = 5.5V
IOH = -24 mA, VCC = 4.5V
IOH = -24 mA, VCC = 5.5V
IOL = 50 μA, VCC = 4.5V
IOL = 50 μA, VCC = 5.5V
IOL = 24 mA, VCC = 4.5V
IOL = 24 mA, VCC = 5.5V
VIN = VCC or GND, VCC = 5.5V
VO = VCC or GND, VCC = 5.5V
VI(OE) = VIL or VIH
VIN = VCC or GND, IOUT = 0, VCC = 5.5V
One input at 3.4V;
other inputs at VCC or GND;
VCC=5.5V
VIN = VCC or GND, VCC=5V
VIN = VCC or GND, VCC=5V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN TYP MAX UNIT
4.4 4.49
5.4 5.49
V
3.86
4.86
0.001 0.1
0.001 0.1
V
0.36
0.36
±0.1
μA
±0.25 μA
4
μA
0.6
mA
2.5
8
pF
pF
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„
CMOS IC
SWITCHING CHARACTERISTICS (TA =25°C)
PARAMETER
SYMBOL
TEST CONDITIONS
Propagation delay from input A to output
tPLH
VCC=5±0.5V, CL=50pF, RL=500Ω
Y, tpd
tPHL
VCC=5±0.5V, CL=50pF, RL=500Ω
VCC=5±0.5V, CL=50pF, RL=500Ω
t
Propagation delay from input OE to
PZH
t
VCC=5±0.5V, CL=50pF, RL=500Ω
PZL
output Y, ten
VCC=5±0.5V, CL=50pF, RL=500Ω
tPHZ
Propagation delay from input OE to
tPLZ
VCC=5±0.5V, CL=50pF, RL=500Ω
output Y, tdis
„
MIN
1.5
1.5
1.5
2
2
2.5
TYP
6
5.5
7
7
8
6.5
MAX UNIT
8.5
ns
7.5
8.5
ns
9.5
9.5
ns
10
OPERATING CHARACTERISTICS (TA =25°C)
PARAMETER
Power dissipation capacitance per
buffer/driver
SYMBOL
Cpd
TEST CONDITIONS
VCC = 5V, f=1MHz, CL=50pF
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
TYP UNIT
45
pF
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U74ACT240
„
CMOS IC
TEST CIRCUIT AND WAVEFORMS
VCC
5V±0.5V
VCC
Inputs
VIN
VCC
Inputs
tr, tf
≤2.5ns
VM
TEST
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
S1
Open
VLOAD
Open
VM
VLOAD
CL
RL
VΔ
VCC/2
VLOAD
2*VCC
CL
50pF
RL
500Ω
VΔ
5V±0.5V
VCC
VIN
Input
VM
VM
0V
tPHL
tPLH
VOH
Output
VM
VM
VOL
tPLH
tPHL
VOH
VM
VM
Output
VOL
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U74ACT240
„
CMOS IC
TEST CIRCUIT AND WAVEFORMS (Cont.)
VIN
Input
VM
VM
0V
tPZL
tPZL
VLOAD/2
Output
S 1 at VLOAD
VM
VOL
tPZH
tPZH
VOH
Output
S 1 at Open
VM
0V
Notes: 1. CL includes probe and jig capacitance.
2. All input pulses are supplied by generators having the following characteristics: PRR ≤1MHz, ZO = 50Ω.
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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