SGS Thomson Microelectronics 74LCX244TTR, 74LCX244MTR, 74LCX244M Datasheet
74LCX244
LOW VOLTAGE CMOS OCTAL BUS BUFFER (3-STATE)
WITH 5V TOLERANT INPUTS AND OUTPUTS
■ 5V TOLERANT INPUTS AND OUTPUTS
■ HIGH SPEED :
t
= 6.5 ns (MAX.) at VCC = 3V
PD
■ POWER DOWN PROTECTION ON INPUT S
AND OUTPUTS
■ SYMMETRICAL OUTPUT IMPEDANCE:
| = IOL = 24mA (MIN) at VCC = 3V
|I
OH
■ PCI BUS LEVELS GUARANT EED AT 2 4 mA
■ BALANCED PROPAGATION DELAYS:
t
≅ t
PLH
■ OPERATING VOLTAGE RANGE:
V
CC
PHL
(OPR) = 2.0V to 3.6V (1.5V Data
Retention)
■ PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 244
■ LATCH-UP PERFORMANCE EXCEEDS
500mA (JESD 17)
■ ESD PERFORMANCE:
HBM > 2000V (MIL STD 883 method 3015);
MM > 200V
DESCRIPTION
The 74LCX244 is a low voltage CMOS OCTAL
BUS BUFFER (NON-INVERTED) fabricated with
sub-micron silicon gate and double-layer metal
wiring C
2
MOS technology. It is ideal for low power
TSSOPSOP
ORDER CODES
PACKAGE TUBE T & R
SOP 74LCX244M 74LCX244MTR
TSSOP 74LCX244TTR
and high speed 3.3V applications; it can be
interfaced to 5V signal environment for both inputs
and ou tputs.
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 stat ic discharge, giving
them 2KV ESD immunity and transient excess
voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
1/9March 2002
74LCX244
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION TRUTH TABLE
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, 172A1 to 2A4 Data Inputs
18, 16, 14, 121Y1 to 1Y4 Data Outputs
19 2G
Output Enable Input
X : Don’t Care
Z : High Impedance
INPUT OUTPUT
G
An Yn
LLL
LHH
HXZ
10 GND Ground (0V)
20 V
CC
Positive Supply Voltage
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
V
V
V
I
I
OK
I
I
CC
I
GND
T
T
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
1) I
absolute ma xim um rating mu st be observed
O
2) V
< GND
O
Supply Voltage
CC
DC Input Voltage
I
DC Output Voltage (OFF State)
O
DC Output Voltage (High or Low State) (note 1) -0.5 to VCC + 0.5
O
DC Input Diode Current
IK
DC Output Diode Current (note 2)
DC Output Current
O
DC Supply Current per Supply Pin
DC Ground Current per Supply Pin
Storage Temperature
stg
Lead Temperature (10 sec)
L
-0.5 to +7.0 V
-0.5 to +7.0 V
-0.5 to +7.0 V
- 50 mA
- 50 mA
50 mA
±
100 mA
±
100 mA
±
-65 to +150 °C
300 °C
V
2/9
74LCX244
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Value Unit
V
V
V
V
I
OH
I
OH
T
dt/dv Input Rise and Fall Time (note 2) 0 to 10 ns/V
1) Truth T abl e guaranteed: 1.5V to 3.6V
2) V
from 0.8V to 2V at VCC = 3.0V
IN
DC SPECIFICATIONS
Supply Voltage (note 1)
CC
Input Voltage
I
Output Voltage (OFF State)
O
Output Voltage (High or Low State) 0 to V
O
, I
High or Low Level Output Current (VCC = 3.0 to 3.6V)
OL
, I
High or Low Level Output Current (VCC = 2.7V)
OL
Operating Temperature
op
Test Condition Value
2.0 to 3.6 V
0 to 5.5 V
0 to 5.5 V
CC
24 mA
±
12 mA
±
-55 to 125 °C
V
Symbol Parameter
V
V
V
V
I
I
OZ
IH
IL
OH
OL
I
I
off
High Level Input
Voltage
Low Level Input
Voltage
High Level Output
Voltage
Low Level Output
Voltage
Input Leakage
Current
Power Off Leakage
Current
High Impedance
Output Leakage
Current
I
CC
I
∆
Quiescent Supply
Current
ICC incr. per Input
CC
V
CC
(V)
2.7 to 3.6
2.7 to 3.6
2.7
3.0
2.7 to 3.6
2.7
3.0
2.7 to 3.6
0
2.7 to 3.6
2.7 to 3.6
2.7 to 3.6
-40 to 85 °C -55 to 125 °C
Min. Max. Min. Max.
2.0 2.0 V
0.8 0.8 V
IO=-100 µAVCC-0.2 VCC-0.2
I
=-12 mA
O
I
=-18 mA
O
I
=-24 mA
O
=100 µA
I
O
I
=12 mA
O
I
=16 mA
O
I
=24 mA
O
= 0 to 5.5V
V
I
V
or VO = 5.5V
I
= VIH or V
V
I
VO = 0 to V
VI = VCC or GND
V
or VO= 3.6 to 5.5V
I
VIH = VCC - 0.6V
IL
CC
2.2 2.2
2.4 2.4
2.2 2.2
0.2 0.2
0.4 0.4
0.4 0.4
0.55 0.55
5
±
10 10
5
±
10 10
10
±
500 500
Unit
V
V
5
±
5
±
10
±
A
µ
A
µ
A
µ
A
µ
A
µ
3/9
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