SGS Thomson Microelectronics 74LCX16244TTR Datasheet
LOW VOLTAGE CMOS 16-BIT BUS BUFFER (3-STATE)
WITH 5V TOLERANT INPUTS AND OUTPUTS
■ 5V TOLERANT INPUTS AND OUTPUTS
■ HIGH SPEED :
t
= 4.5 ns (MAX.) at VCC=3V
PD
■ POWER DOWN PROTECTION ON INPUTS
AND OUTPUTS
■ SYMMETRICAL OUTPUT IMPEDANCE:
|I
|=IOL= 24mA (MIN) at VCC=3V
OH
■ PCI BUS LEVELS GUARANTEED AT 24 mA
■ BALANCED PROPAGATION DELAYS:
t
≅ t
PLH
PHL
■ OPERATING VOLTAGE RAN GE:
V
(OPR) = 2.0V to 3.6V (1.5V D ata
CC
Retention)
■ PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 16244
■ LATCH-UP PERFORMANCE EXCEEDS
500mA (JESD 17)
■ ESD PERFORMANCE:
HBM > 2000V (MIL STD 883 method 3015);
MM > 200V
74LCX16244
TSSOP
ORDER CODES
PACKAGE TUBE T & R
TSSOP 74LCX16244TTR
PIN CO NNE CTION
DESCRIPTION
The 74LCX16244 is a low voltage CMOS 16 BIT
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
and high speed 3.3V applications; it can be
interfaced to 5V signal env ironment for both inputs
and outputs.
Any nG
ERS. Output Enable input (nG
output control governs four BUS BUFF-
) tied together gives
full 16-bit operation.
When nG
is LO W, the outputs are on. When nG is
HIGH, the output are in high impedance state.
This device is designed to be us ed with 3 state
memory address drivers, etc.
It has same speed performance at 3.3V than 5V
AC/ACT family, combined with a lower power
consumption.
All inputs and ou tputs are equipped with protection circuits against static disc harge, giving them
2KV ESD immunity and transient excess vo ltage.
1/10February 2003
74LCX16244
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No SYMBOL NAME AND FUNCTION
11G
2, 3, 5, 6 1Y1 to 1Y4 Data Outputs
8, 9, 11, 12 2Y1 to 2Y4 Data Outputs
13, 14, 16, 17 3Y1 to 3Y4 Data Outputs
19, 20, 22, 23 4Y1 to 4Y4 Data Outputs
24 4G
25 3G
30, 29, 27, 26 4A1 to 4A4 Data Outputs
36, 35, 33, 32 3A1 to 3A4 Data Outputs
41, 40, 38, 37 2A1 to 2A4 Data Outputs
47, 46, 44, 43 1A1 to 1A4 Data Outputs
48 2G
4, 10, 15, 21,
28, 34, 39, 45
7, 18, 31, 42
GND Ground (0V)
V
CC
Output Enable Input
Output Enable Input
Output Enable Input
Output Enable Input
Positive Supply Voltage
TRUTH TABLE
INPUTS OUTPUT
G
LLL
LHH
HXZ
X : Don‘t Care
Z : High Impedance
An Yn
IEC LOGIC SYMBOLS
2/10
74LCX16244
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 tothe device may occur. Functional operation under these conditions is
not implied
1) I
absolute maximum rating must be observed
O
2) VO<GND
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Value Unit
V
V
V
V
I
OH,IOL
I
OH,IOL
T
dt/dv Input Rise and Fall Time (note 2) 0 to 10 ns/V
1) Truth Table guaranteed: 1.5V to 3.6V
from0.8V to 2Vat VCC=3.0V
2) V
IN
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
Supply Voltage (note 1)
CC
Input Voltage
I
Output Voltage (OFF State)
O
Output Voltage (High or Low State) 0 to V
O
High or Low Level Output Current (VCC= 3.0 to 3.6V)
High or Low Level Output Current (VCC= 2.7V)
Operating Temperature
op
-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
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
V
3/10
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