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February 2003
s
5V TOLERANT INPUTS AND OUTPUTS
s
HIGH SPEED :
t
PD
= 4.4 ns (MAX.) at V
CC
= 3V
s
POWER DOWN PROTECTION ON INPUTS
AND OUTPUTS
s
SYMMETRICAL OUTPUT IMPEDANCE:
|I
OH
| = I
OL
= 12mA (MIN) at V
CC
= 3V
s
PCI BUS LEVELS GUARANTEED AT 12 mA
s
BALANCED PROPAGATION DELAYS:
t
PLH
t
PHL
s
26
SERIE RESISTORS IN OUTPUTS
s
OPERATING VOLTAGE RANGE:
V
CC
(OPR) = 2.0V to 3.6V (1.5V Data
Retention)
s
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 162541
s
LATCH-UP PERFORMANCE EXCEEDS
500mA (JESD 17)
s
ESD PERFORMANCE:
HBM > 2000V (MIL STD 883 method 3015);
MM > 200V
DESCRIPTION
The 74LCX162541 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 environment for both inputs
and outputs.
This is composed of two 8-bit sections with sepa-
rate output-enable signals. For either 8-bit buffers
section, the 3 STATE control gate operates as a
two input AND such that if either nG1 and nG2 are
high, all outputs are in the high impedence state.
This device is designed to be used with 3 state
memory address drivers, etc.
The device circuits is including 26
series resis-
tance in the outputs. These resistors permit to re-
duce line noise in high speed applications.
All inputs and outputs are equipped with protec-
tion circuits against static discharge, giving them
2KV ESD immunity and transient excess voltage.
74LCX162541
LOW VOLTAGE CMOS 16-BIT BUS BUFFER (3-STATE)
WITH 5V TOLERANT INPUTS AND OUTPUTS
ORDER CODES
PACKAGE
TUBE
T & R
TSSOP
74LCX162541TTR
TSSOP
PIN CONNECTION
74LCX162541
2/10
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
TRUTH TABLE
X : Don`t Care
Z : High Impedance
IEC LOGIC SYMBOLS
PIN No
SYMBOL
NAME AND FUNCTION
1, 48
1G1, 1G2
Output Enable Inputs
2, 3, 5, 6, 8, 9,
11, 12
1Y1 to 1Y8 Data Outputs
13, 14, 16, 17,
19, 20, 22, 23
2Y1 to 2Y8 Data Outputs
24, 25
2G1, 2G2
Output Enable Inputs
36, 35, 33, 32,
30, 29, 27, 26
2A1 to 2A8 Data Outputs
47, 46, 44, 43,
41, 40, 38, 37
1A1 to 1A8 Data Outputs
4, 10, 15, 21,
28, 34, 39, 45
GND
Ground (0V)
7, 18, 31, 42
V
CC
Positive Supply Voltage
INPUTS
OUTPUT
G1
G2
An
Yn
H
X
X
Z
X
H
X
Z
L
L
H
H
L
L
L
L
74LCX162541
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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
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
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
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)
12
mA
I
OH
, I
OL
High or Low Level Output Current (V
CC
= 2.7V )
8
mA
T
op
Operating Temperature
-55 to 125
C
dt/dv
Input Rise and Fall Time (note 2)
0 to 10
ns/V
74LCX162541
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DC SPECIFICATIONS
DYNAMIC SWITCHING CHARACTERISTICS
1) Number of outputs defined as "n". Measured with "n-1" outputs switching from HIGH to LOW or LOW to HIGH. The remaining output is
measured in the LOW state.
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
A
V
CC
-0.2
V
CC
-0.2
V
2.7
I
O
=-8 mA
2.0
2.0
3.0
I
O
=-6 mA
2.4
2.4
I
O
=-12 mA
2.0
2.0
V
OL
Low Level Output
Voltage
2.7 to 3.6
I
O
=100
A
0.2
0.2
V
2.7
I
O
=8 mA
0.6
0.6
3.0
I
O
=6 mA
0.55
0.55
I
O
=12 mA
0.8
0.8
I
I
Input Leakage
Current
2.7 to 3.6
V
I
= 0 to 5.5V
5
5
A
I
off
Power Off Leakage
Current
0
V
I
or V
O
= 5.5V
10
10
A
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
A
I
CC
Quiescent Supply
Current
2.7 to 3.6
V
I
= V
CC
or GND
20
20
A
V
I
or V
O
= 3.6 to 5.5V
20
20
I
CC
I
CC
incr. per Input
2.7 to 3.6
V
IH
= V
CC
- 0.6V
500
500
A
Symbol
Parameter
Test Condition
Value
Unit
V
CC
(V)
T
A
= 25 C
Min.
Typ.
Max.
V
OLP
Dynamic Low Level Quiet
Output (note 1)
3.3
C
L
= 50pF
V
IL
= 0V, V
IH
= 3.3V
0.8
V
V
OLV
-0.8
74LCX162541
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AC ELECTRICAL CHARACTERISTICS
1) Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switch-
ing in the same direction, either HIGH or LOW (t
OSLH
= | t
PLHm
- t
PLHn
|, t
OSHL
= | t
PHLm
- t
PHLn
|)
2) Parameter guaranteed by design
CAPACITIVE CHARACTERISTICS
1) C
PD
is defined as the value of the IC's internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I
CC(opr)
= C
PD
x V
CC
x f
IN
+ I
CC
/16 (per
circuit)
Symbol
Parameter
Test Condition
Value
Unit
V
CC
(V)
C
L
(pF)
R
L
(
)
t
s
= t
r
(ns)
-40 to 85 C
-55 to 125 C
Min.
Max.
Min.
Max.
t
PLH
t
PHL
Propagation Delay
Time
2.7
50
500
2.5
1.5
5.6
1.5
6.5
ns
3.0 to 3.6
1.5
4.4
1.5
5.1
t
PZL
t
PZH
Output Enable Time
2.7
50
500
2.5
1.5
6.3
1.5
7.2
ns
3.0 to 3.6
1.5
5.9
1.5
6.8
t
PLZ
t
PHZ
Output Disable Time
2.7
50
500
2.5
1.5
6.3
1.5
7.2
ns
3.0 to 3.6
1.5
5.9
1.5
6.8
t
OSLH
t
OSHL
Output To Output
Skew Time (note1,
2)
3.0 to 3.6
50
500
2.5
1.0
1.0
ns
Symbol
Parameter
Test Condition
Value
Unit
V
CC
(V)
T
A
= 25 C
Min.
Typ.
Max.
C
IN
Input Capacitance
4
pF
C
OUT
Output Capacitance
10
pF
C
PD
Power Dissipation Capacitance
(note 1)
3.3
f
IN
= 10MHz
V
IN
= 0 or V
CC
50
pF
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