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74VHC240MTR

P1-P3P4-P6P7-P9
1/9June 2001
■ HIGH SPEED: t
PD
= 3.6ns (TYP.) at V
CC
= 5V
■ LOW POWER DISSIPATION:
I
CC
= 4 µA (MAX.) at T
A
=25°C
■ HIGH NOISE IMMUNITY:
V
NIH
= V
NIL
= 28% V
CC
(MIN.)
■ POWER DOWN PROTECTION ON INPUTS
■ SYMMETRICAL OUTPUT IMPEDANCE:
|I
OH
| = I
OL
= 8 mA (MIN)
■ BALANCED PROPAGATION DELAYS:
t
PLH
≅ t
PHL
■ OPERATING VOLTAGE RANGE:
V
CC
(OPR) = 2V to 5.5V
■ PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 240
■ IMPROVED LATCH-UP IMMUNITY
■ LOW NOISE: V
OLP
= 0.9V (MAX.)
DESCRIPTION
The 74VHC240 is an advanced high-speed
CMOS OCTAL BUS BUFFER (3-STATE)
fabricated with sub-micron silicon gate and
double-layer metal wiring C
2
MOS technology.
G
output enable governs four BUS BUFFERs.
This device is designed to be used with 3 state
memory address drivers, etc.
Power down protection is provided on all inputs
and 0 to 7V can be accepted on inputs with no
regard to the supply voltage. This device can be
used to interface 5V to 3V.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
74VHC240
OCTAL BUS BUFFER
WITH 3 STATE OUTPUTS (INVERTED)
PIN CONNECTION AND IEC LOGIC SYMBOLS
ORDER CODES
PACKAGE TUBE T & R
SOP 74VHC240M 74VHC240MTR
TSSOP 74VHC240TTR
TSSOPSOP
74VHC240
2/9
INPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
TRUTH TABLE
X : Don‘t Care
Z : High Impedance
ABSOLUTE MAXIMUM RATINGS
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
1) V
IN
from 30% to 70% of V
CC
PIN No SYMBOL NAME AND FUNCTION
11G
Output Enable Input
2, 4, 6, 8 1A1 to 1A4 Data Inputs
9, 7, 5, 3 2Y1
to 2Y4 Data Outputs
11, 13, 15,
17
2A1 to 2A4 Data Inputs
18, 16, 14,
12
1Y1
to 1Y4 Data Outputs
19 2G
Output Enable Input
10 GND Ground (0V)
20 V
CC
Positive Supply Voltage
INPUTS OUTPUT
G
An Yn
LLH
LHL
HXZ
Symbol Parameter Value Unit
V
CC
Supply Voltage
-0.5 to +7.0 V
V
I
DC Input Voltage
-0.5 to +7.0 V
V
O
DC Output Voltage -0.5 to V
CC
+ 0.5
V
I
IK
DC Input Diode Current
- 20 mA
I
OK
DC Output Diode Current
± 20 mA
I
O
DC Output Current
± 25 mA
I
CC
or I
GND
DC V
CC
or Ground Current
± 75 mA
T
stg
Storage Temperature
-65 to +150 °C
T
L
Lead Temperature (10 sec)
300 °C
Symbol Parameter Value Unit
V
CC
Supply Voltage
2 to 5.5 V
V
I
Input Voltage
0 to 5.5 V
V
O
Output Voltage 0 to V
CC
V
T
op
Operating Temperature
-55 to 125 °C
dt/dv
Input Rise and Fall Time (note 1) (V
CC
= 3.3 ± 0.3V)
(V
CC
= 5.0 ± 0.5V)
0 to 100
0 to 20
ns/V
74VHC240
3/9
DC SPECIFICATIONS
Symbol Parameter
Test Condition Value
Unit
V
CC
(V)
T
A
= 25°C
-40 to 85°C -55 to 125°C
Min. Typ. Max. Min. Max. Min. Max.
V
IH
High Level Input
Voltage
2.0 1.5 1.5 1.5
V
3.0 to
5.5
0.7V
CC
0.7V
CC
0.7V
CC
V
IL
Low Level Input
Voltage
2.0 0.5 0.5 0.5
V
3.0 to
5.5
0.3V
CC
0.3V
CC
0.3V
CC
V
OH
High Level Output
Voltage
2.0
I
O
=-50 µA
1.9 2.0 1.9 1.9
V
3.0
I
O
=-50 µA
2.9 3.0 2.9 2.9
4.5
I
O
=-50 µA
4.4 4.5 4.4 4.4
3.0
I
O
=-4 mA
2.58 2.48 2.4
4.5
I
O
=-8 mA
3.94 3.8 3.7
V
OL
Low Level Output
Voltage
2.0
I
O
=50 µA
0.0 0.1 0.1 0.1
V
3.0
I
O
=50 µA
0.0 0.1 0.1 0.1
4.5
I
O
=50 µA
0.0 0.1 0.1 0.1
3.0
I
O
=4 mA
0.36 0.44 0.55
4.5
I
O
=8 mA
0.36 0.44 0.55
Ioz High Impedance
Output Leakage
Current
5.5
V
I
= V
IH
or V
IL
V
O
= V
CC
or GND
±0.25 ± 2.5 ± 2.5 µA
I
I
Input Leakage
Current
0 to
5.5
V
I
= 5.5V or GND
± 0.1 ± 1 ± 1 µA
I
CC
Quiescent Supply
Current
5.5
V
I
= V
CC
or GND
44040µA
P1-P3P4-P6P7-P9

74VHC240MTR

Mfr. #:
Buy 74VHC240MTR
Manufacturer:
STMicroelectronics
Description:
Buffers & Line Drivers Octal Bus Buffer
Lifecycle:
New from this manufacturer.
Delivery:
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