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74LCX240TTR

P1-P3P4-P6P7-P9P10-P12
1/12September 2004
■ 5V TOLERANT INPUTS AND OUTPUTS
■ HIGH SPEED:
t
PD
= 6.5 ns (MAX.) at V
CC
= 3V
■ POWER DOWN PROTECTION ON INPUTS
AND OUTPUTS
■ SYMMETRICAL OUTPUT IMPEDANCE:
|I
OH
| = I
OL
= 24mA (MIN) at V
CC
= 3V
■ PCI BUS LEVELS GUARANTEED AT 24 mA
■ BALANCED PROPAGATION DELAYS:
t
PLH
≅ t
PHL
■ OPERATING VOLTAGE RANGE:
V
CC
(OPR) = 2.0V to 3.6V (1.5V Data
Retention)
■ PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 240
■ LATCH-UP PERFORMANCE EXCEEDS
500mA (JESD 17)
■ ESD PERFORMANCE:
HBM > 2000V (MIL STD 883 method 3015);
MM > 200V
DESCRIPTION
The 74LCX240 is a low voltage CMOS OCTAL
BUS BUFFER fabricated with sub-micron silicon
gate and double-layer metal wiring C
2
MOS
technology. It is ideal for low power and high
speed 3.3V applications; it can be interfaced to 5V
signal environment for both inputs and outputs.
It has same speed performance at 3.3V than 5V
AC/ACT family, combined with a lower power
consumption.
This device is designed to be used with 3 state
memory address drivers, etc.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
74LCX240
LOW VOLTAGE CMOS OCTAL BUS BUFFER (3-STATE INV.)
WITH 5V TOLERANT INPUTS AND OUTPUTS
Figure 1: Pin Connection And IEC Logic Symbols
Table 1: Order Codes
PACKAGE T & R
SOP 74LCX240MTR
TSSOP 74LCX240TTR
TSSOPSOP
Rev. 6
74LCX240
2/12
Figure 2: Input And Output Equivalent Circuit
Table 2: Pin Description Table 3: Truth Table
X : Don’t Care
Z : High Impedance
Table 4: 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
1) I
O
absolute maximum rating must be observed
2) V
O
< GND
PIN N° SYMBOL NAME AND FUNCTION
11GOutput 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
INPUT 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 (OFF State)
-0.5 to +7.0 V
V
O
DC Output Voltage (High or Low State) (note 1) -0.5 to V
CC
+ 0.5
V
I
IK
DC Input Diode Current
- 50 mA
I
OK
DC Output Diode Current (note 2)
- 50 mA
I
O
DC Output Current
± 50 mA
I
CC
DC Supply Current per Supply Pin
± 100 mA
I
GND
DC Ground Current per Supply Pin
± 100 mA
T
stg
Storage Temperature
-65 to +150 °C
T
L
Lead Temperature (10 sec)
300 °C
74LCX240
3/12
Table 5: Recommended Operating Conditions
1) Truth Table guaranteed: 1.5V to 3.6V
2) V
IN
from 0.8V to 2V at V
CC
= 3.0V
Table 6: DC Specifications
Symbol Parameter Value Unit
V
CC
Supply Voltage (note 1)
2.0 to 3.6 V
V
I
Input Voltage
0 to 5.5 V
V
O
Output Voltage (OFF State)
0 to 5.5 V
V
O
Output Voltage (High or Low State) 0 to V
CC
V
I
OH
, I
OL
High or Low Level Output Current (V
CC
= 3.0 to 3.6V)
± 24 mA
I
OH
, I
OL
High or Low Level Output Current (V
CC
= 2.7V)
± 12 mA
T
op
Operating Temperature
-55 to 125 °C
dt/dv Input Rise and Fall Time (note 2) 0 to 10 ns/V
Symbol Parameter
Test Condition Value
Unit
V
CC
(V)
-40 to 85 °C -55 to 125 °C
Min. Max. Min. Max.
V
IH
High Level Input
Voltage
2.7 to 3.6
2.0 2.0 V
V
IL
Low Level Input
Voltage
0.8 0.8 V
V
OH
High Level Output
Voltage
2.7 to 3.6
I
O
=-100 µAV
CC
-0.2 V
CC
-0.2
V
2.7
I
O
=-12 mA
2.2 2.2
3.0
I
O
=-18 mA
2.4 2.4
I
O
=-24 mA
2.2 2.2
V
OL
Low Level Output
Voltage
2.7 to 3.6
I
O
=100 µA
0.2 0.2
V
2.7
I
O
=12 mA
0.4 0.4
3.0
I
O
=16 mA
0.4 0.4
I
O
=24 mA
0.55 0.55
I
I
Input Leakage
Current
2.7 to 3.6
V
I
= 0 to 5.5V
± 5 ± 5 µA
I
off
Power Off Leakage
Current
0
V
I
or V
O
= 5.5V
10 10 µA
I
OZ
High Impedance
Output Leakage
Current
2.7 to 3.6
V
I
= V
IH
or V
IL
V
O
= 0 to V
CC
± 5 ± 5 µA
I
CC
Quiescent Supply
Current
2.7 to 3.6
V
I
= V
CC
or GND
10 10
µA
V
I
or V
O
= 3.6 to 5.5V
± 10 ± 10
∆I
CC
I
CC
incr. per Input
2.7 to 3.6
V
IH
= V
CC
- 0.6V
500 500 µA
P1-P3P4-P6P7-P9P10-P12

74LCX240TTR

Mfr. #:
Buy 74LCX240TTR
Manufacturer:
STMicroelectronics
Description:
Buffers & Line Drivers Octal Bus Buffer
Lifecycle:
New from this manufacturer.
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