SGS Thomson Microelectronics 74LCX540M, 74LCX540TTR, 74LCX540MTR Datasheet
1/9September 2001
■ 5V TOLERANT INPUTS AND OUTPUTS
■ HIGH SPEED :
t
PD
= 8.0 ns (MAX.) at VCC = 3V
■ POWER DOWN PROTECTION ON INPUT 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) = 2.0V to 3.6V (1.5V Data
Retention)
■ PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 540
■ LATCH-UP PERFORMANCE EXCEEDS
500mA (JESD 17)
■ ESD PERFORMANCE:
HBM > 2000V (MIL STD 883 method 3015);
MM > 200V
DESCRIPTION
The 74LCX540 is a low voltage CMOS OCTAL
BUS BUFFER (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 environment for both inputs
and ou tputs.
The 3 STATE control gate ope rates as two input
AND such that if either G1
and G2 are high, all
eight outputs are in the high impedance s tate. In
order to enhance P C board l ayout the 74L CX540
offers a pinout having inputs and outputs on
opposite sides of the package.
It has same 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.
74LCX540
LOW VOLTAGE CMOS OCTAL BUS BUFFER (3-STATE)
WITH 5V TOLERANT INPUTS AND OUTPUTS
PIN CONNECTION AND IEC LOGIC SYMBOLS
ORDER CODES
PACKAGE TUBE T & R
SOP 74LCX540M 74LCX540MTR
TSSOP 74LCX540TTR
TSSOPSOP
74LCX540
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 mu st be observed
2) V
O
< GND
PIN No SYMBOL NAME AND FUNCTION
1, 19 G1
, G2 Output Enable Inputs
2, 3, 4, 5, 6,
7, 8, 9
A1 to A8 Data Inputs
18, 17, 16,
15, 14, 13,
12, 11
Y1
to Y8 Data Outputs
10 GND Ground (0V)
20 V
CC
Positive Supply Voltage
INPUT OUTPUT
G1
G2 An Yn
HXXZ
XHXZ
LLHL
LLLH
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 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
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
74LCX540
3/9
RECOMMENDED OPERATING CONDITIONS
1) Truth T abl e guaranteed: 1.5V to 3.6V
2) V
IN
from 0.8V to 2V at VCC = 3.0V
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 (VCC = 3.0 to 3.6V)
± 24 mA
I
OH
, I
OL
High or Low Level Output Current (VCC = 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
IO=-100 µAVCC-0.2 VCC-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 VO = 5.5V
10 10 µA
I
OZ
High Impedance
Output Leakage
Current
2.7 to 3.6
V
I
= VIH or V
IL
VO = 0 to V
CC
± 5 ± 5 µA
I
CC
Quiescent Supply
Current
2.7 to 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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