SGS Thomson Microelectronics 74LVC244ATTR, 74LVC244AMTR, 74LVC244AM Datasheet
1/9February 2002
■ 5V TOLERANT INPUTS
■ HIGH SPEED: t
PD
= 5.9ns (MAX.) at VCC = 3V
■ POWER DOWN PROTECTION ON INPU T S
AND OUTPUTS
■ SYMMETRICAL OUTPUT IMPEDANCE:
|I
OH
| = IOL = 24mA (MIN) at VCC = 3V
■ PCI BUS LEVELS GUARANT EED AT 2 4 mA
■ BALANCED PROPAGATION DELAYS:
t
PLH
≅ t
PHL
■
OPERATING VOLTAGE RANGE:
V
CC
(OPR) = 1.65V to 3.6V (1.2V 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 74LVC244A is a lo w voltage CMOS OCTAL
BUS BUFFER (3-STATE) fabricated with
sub-micron silicon gate and double-layer metal
wiring C
2
MOS technology. It is ideal for 1.65 to 3.6
V
CC
operations and low power and low noise
applications.
It can be interfaced to 5V signal environment for
inputs in mixed 3.3/5V system.
G
control output governs four BUS BUFFERs.
This device is designed to be used with 3 state
memory address drivers, etc.
It has more speed performance at 3.3V than 5V
AC/ACT family, combined with a lower power
consumption.
All inputs and outputs are equipped with
protection circuits against stat ic discharge, giving
them 2KV ESD immunity and transient excess
voltage.
74LVC244A
LOW VOLTAGE CMOS QUAD BUS BUFFERS (3-STATE)
HIGH PERFORMANCE
.
PIN CONNECTION AND IEC LOGIC SYMBOLS
ORDER CODES
PACKAGE TUBE T & R
SOP 74LVC244AM 74LVC244AMTR
TSSOP 74LVC244ATTR
TSSOPSOP
74LVC244A
2/9
INPUT AND OUTPUT 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
1) I
O
absolute ma xim um rating must be obse rved
2) V
O
< GND
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
10 GND Ground (0V)
20 V
CC
Positive Supply Voltage
INPUTS OUTPUT
G
An Yn
LLL
LHH
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 (High Impedance or VCC = 0V)
-0.5 to +7.0 V
V
O
DC Output Voltage (High or Low State) (note 1) -0.5 to VCC + 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
or I
GND
DC VCC or Ground Current per Supply Pin
± 100 mA
T
stg
Storage Temperature
-65 to +150 °C
T
L
Lead Temperature (10 sec)
300 °C
74LVC244A
3/9
RECOMMENDED OPERATING CONDITIONS
1) Truth T abl e guarante ed: 1.2V to 3.6 V
2) V
IN
from 0.8V to 2V at VCC = 3.0V
DC SPECIFICATIONS
Symbol Parameter Value Unit
V
CC
Supply Voltage (note 1)
1.65 to 3.6 V
V
I
Input Voltage
0 to 5.5 V
V
O
Output Voltage (High Impedance or VCC = 0V)
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 (VCC = 3.0 to 3.6V)
± 24 mA
I
OH
, I
OL
High or Low Level Output Current (VCC = 2.7 to 3.0V)
± 12 mA
I
OH
, I
OL
High or Low Level Output Current (VCC = 2.3 to 2.7V)
± 8mA
I
OH
, I
OL
High or Low Level Output Current (VCC = 1.65 to 2.3V)
± 4mA
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
1.65 to 1.95
0.65V
CC
0.65V
CC
V
2.3 to 2.7 1.7 1.7
2.7 to 3.6 2 2
V
IL
Low Level Input
Voltage
1.65 to 1.95
0.35V
CC
0.35V
CC
V
2.3 to 2.7 0.7 0.7
2.7 to 3.6 0.8 0.8
V
OH
High Level Output
Voltage
1.65 to 3.6
IO=-100 µAVCC-0.2 VCC-0.2
V
1.65
I
O
=-4 mA
1.2 1.2
2.3
I
O
=-8 mA
1.7 1.7
2.7
I
O
=-12 mA
2.2 2.2
3.0
I
O
=-18 mA
2.4 2.4
3.0
I
O
=-24 mA
2.2 2.2
V
OL
Low Level Output
Voltage
1.65 to 3.6
I
O
=100 µA
0.2 0.2
V
1.65
I
O
=4 mA
0.45 0.45
2.3
I
O
=8 mA
0.7 0.7
2.7
I
O
=12 mA
0.4 0.4
3.0
I
O
=24 mA
0.55 0.55
I
I
Input Leakage
Current
3.6
V
I
= 0 to 5.5V
± 5 ± 5 µA
I
off
Power Off Leakage
Current
0
V
I
or VO = 5.5V
10 10 µA
I
OZ
High Impedance
Output Leakage
Current
3.6 VI = VIH orVIL
V
O
= 0 to 5.5V
± 5 ± 5 µA
I
CC
Quiescent Supply
Current
3.6
VI = VCC or GND
10 10
µA
V
I
or VO = 3.6 to
5.5V
± 10 ± 10
∆I
CC
ICC incr. per Input
2.7 to 3.6
VIH = VCC-0.6V
500 500 µA
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