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MC74VHCT240A Datasheet

Octal Bus Buffer/Line Driver

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MC74VHCT240A
Octal Bus Buffer/Line Driver
Inverting with 3−State Outputs
The MC74VHCT240A is an advanced high speed CMOS octal bus
buffer fabricated with silicon gate CMOS technology. It achieves high
speed operation similar to equivalent Bipolar Schottky TTL while
maintaining CMOS low power dissipation.
The MC74VHCT240A is an inverting 3−state buffer, and has two
active−low output enables. This device is designed to be used with
3−state memory address drivers, etc.
The VHCT inputs are compatible with TTL levels. This device can
be used as a level converter for interfacing 3.3 V to 5.0 V, because it
has full 5.0 V CMOS level output swings.
The VHCT240A input and output (when disabled) structures
provide protection when voltages between 0 V and 5.5 V are applied,
regardless of the supply voltage. These input and output structures
help prevent device destruction caused by supply
voltage−input/output voltage mismatch, battery backup, hot insertion,
etc.
Features
High Speed: tPD = 5.6 ns (Typ) at VCC = 5.0 V
Low Power Dissipation: ICC = 4 mA (Max) at TA = 25°C
TTL−Compatible Inputs: VIL = 0.8 V; VIH = 2.0 V
Power Down Protection Provided on Inputs and Outputs
Balanced Propagation Delays
Designed for 4.5 V to 5.5 V Operating Range
Low Noise: VOLP = 1.1 V (Max)
Pin and Function Compatible with Other Standard Logic Families
Latchup Performance Exceeds 300 mA
ESD Performance:
Human Body Model > 2000 V;
Machine Model > 200 V
Chip Complexity: 110 FETs or 27.5 Equivalent Gates
These Devices are Pb−Free and are RoHS Compliant
http://onsemi.com
MARKING
DIAGRAMS
20
VHCT240A
1 SOIC−20WB
SUFFIX DW
AWLYYWWG
CASE 751D 1
20
1 TSSOP−20
SUFFIX DT
CASE 948E
1
VHCT
240A
ALYWG
G
A = Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
G or G = Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 4 of this data sheet.
© Semiconductor Components Industries, LLC, 2014
October, 2014 − Rev. 7
1
Publication Order Number:
MC74VHCT240A/D


  ON Semiconductor Electronic Components Datasheet  

MC74VHCT240A Datasheet

Octal Bus Buffer/Line Driver

No Preview Available !

MC74VHCT240A
A1 2
A2 4
18 YA1
16 YA2
OEA 1
A1 2
YB4 3
20 VCC
19 OEB
18 YA1
A3 6
DATA
INPUTS
A4 8
B1 11
14 YA3
12 YA4
9 YB1
INVERTING
OUTPUTS
A2 4
YB3 5
A3 6
YB2 7
A4 8
17 B4
16 YA2
15 B3
14 YA3
13 B2
B2 13
B3 15
B4 17
7 YB2
5 YB3
3 YB4
YB1 9
GND 10
12 YA4
11 B1
Figure 2. Pin Assignment
FUNCTION TABLE
INPUTS
OUTPUTS
OUTPUT OEA 1
ENABLES OEB 19
Figure 1. Logic Diagram
OEA, OEB
L
L
H
A, B
L
H
X
YA, YB
H
L
Z
MAXIMUM RATINGS
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎSymbol
Parameter
Value
Unit
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎVCC DC Supply Voltage
– 0.5 to + 7.0
V
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎVin DC Input Voltage
– 0.5 to + 7.0
V
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎVout DCOutputVoltage
Output in 3−State – 0.5 to + 7.0
High or Low State – 0.5 to VCC + 0.5
V
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎIIK Input Diode Current
− 20 mA
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎIOK Output Diode Current (VOUT < GND; VOUT > VCC)
± 20 mA
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎIout DC Output Current, per Pin
± 25 mA
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎICC DC Supply Current, VCC and GND Pins
± 75 mA
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎPD PowerDissipation in Still Air,
SOIC Package†
TSSOP Package†
500
450
mW
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎTstg Storage Temperature
– 65 to + 150
_C
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎStresses exceeding those listed in the Maximum Ratings table may damage the device. If any
This device contains protection
circuitry to guard against damage
due to high static voltages or electric
fields. However, precautions must
be taken to avoid applications of any
voltage higher than maximum rated
voltages to this high−impedance cir-
cuit. For proper operation, Vin and
Vout should be constrained to the
range GND v (Vin or Vout) v VCC.
Unused inputs must always be
tied to an appropriate logic voltage
level (e.g., either GND or VCC).
Unused outputs must be left open.
of these limits are exceeded, device functionality should not be assumed, damage may occur
and reliability may be affected.
†Derating − SOIC Package: – 7 mW/_C from 65_ to 125_C
TSSOP Package: − 6.1 mW/_C from 65_ to 125_C
RECOMMENDED OPERATING CONDITIONS
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎSymbol
Parameter
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎVCC DCSupplyVoltage
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎVin DCInputVoltage
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎVout DCOutputVoltage
Output in 3−State
High or Low State
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎTA Operating Temperature
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎtr,tf InputRiseandFallTime
VCC =5.0V ±0.5V
Min
4.5
0
0
0
− 40
0
Max
5.5
5.5
5.5
VCC
+ 85
20
Unit
V
V
V
_C
ns/V
Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond
the Recommended Operating Ranges limits may affect device reliability.
http://onsemi.com
2


Part Number MC74VHCT240A
Description Octal Bus Buffer/Line Driver
Maker ON Semiconductor
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