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February 2003
s
3.6V TOLERANT INPUTS AND OUTPUTS
s
HIGH SPEED :
t
PD
= 3.0 ns (MAX.) at V
CC
= 3.0 to 3.6V
t
PD
= 3.7 ns (MAX.) at V
CC
= 2.3 to 2.7V
t
PD
= 5.1 ns (MAX.) at V
CC
= 1.65V
s
POWER DOWN PROTECTION ON INPUTS
AND OUTPUTS
s
SYMMETRICAL OUTPUT IMPEDANCE:
|I
OH
| = I
OL
= 24mA (MIN) at V
CC
= 3.0V
|I
OH
| = I
OL
= 12mA (MIN) at V
CC
= 2.3V
|I
OH
| = I
OL
= 4mA (MIN) at V
CC
= 1.65V
s
OPERATING VOLTAGE RANGE:
V
CC
(OPR) = 1.65V to 3.6V
s
BUS HOLD PROVIDED ON DATA INPUTS
s
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 16244
s
LATCH-UP PERFORMANCE EXCEEDS
300mA (JESD 17)
s
ESD PERFORMANCE:
HBM > 2000V (MIL STD 883 method 3015);
MM > 200V
DESCRIPTION
The 74ALVCH16244 is a low voltage CMOS 16
BIT BUS BUFFER (NON INVERTED) fabricated
with sub-micron silicon gate and five-layer metal
wiring C
2
MOS technology. It is ideal for low power
and very high speed 1.65 to 3.6V applications; it
can be interfaced to 3.6V signal environment for
both inputs and outputs.
Any
nG
output
control
governs
four
BUS
BUFFERS. Output Enable input (nG) tied together
gives full 16-bit operation.
When nG is LOW, the outputs are enabled. When
nG is HIGH, the output are in high impedance
state.
Active bus-hold circuitry is provided to hold
unused or floating data inputs at a valid logic level.
This device is designed to be used with 3 state
memory address drivers, etc.
All
inputs
and
outputs
are
equipped
with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
74ALVCH16244
LOW VOLTAGE CMOS 16-BIT BUS BUFFER (3-STATE)
WITH 3.6V TOLERANT INPUTS AND OUTPUTS
ORDER CODES
PACKAGE
TUBE
T & R
TSSOP
74ALVCH16244TTR
TSSOP
PIN CONNECTION
74ALVCH16244
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
1G
Output Enable Input
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
Output Enable Input
25
3G
Output Enable Input
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
Output Enable Input
4, 10, 15, 21,
28, 34, 39, 45
GND
Ground (0V)
7, 18, 31, 42
V
CC
Positive Supply Voltage
INPUTS
OUTPUT
G
An
Yn
L
L
L
L
H
H
H
X
Z
74ALVCH16244
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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, V
O
> V
CC
RECOMMENDED OPERATING CONDITIONS
1) V
IN
from 0.8V to 2V at V
CC
= 3.0V
Symbol
Parameter
Value
Unit
V
CC
Supply Voltage
-0.5 to +4.6
V
V
I
DC Input Voltage
-0.5 to +4.6
V
V
O
DC Output Voltage (OFF State)
-0.5 to +4.6
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
or I
GND
DC V
CC
or Ground Current per Supply Pin
100
mA
P
D
Power Dissipation
400
mW
T
stg
Storage Temperature
-65 to +150
C
T
L
Lead Temperature (10 sec)
300
C
Symbol
Parameter
Value
Unit
V
CC
Supply Voltage
1.65 to 3.6
V
V
I
Input Voltage
-0.3 to 3.6
V
V
O
Output Voltage (OFF State)
0 to 3.6
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)
24
mA
I
OH
, I
OL
High or Low Level Output Current (V
CC
= 2.3 to 2.7V)
12
mA
I
OH
, I
OL
High or Low Level Output Current (V
CC
= 1.65V)
4
mA
T
op
Operating Temperature
-55 to 125
C
dt/dv
Input Rise and Fall Time (note 1)
0 to 10
ns/V
74ALVCH16244
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DC SPECIFICATIONS
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
0.65 Vcc
0.65 Vcc
V
2.3 to 2.7
1.7
1.7
2.7 to 3.6
2.0
2.0
V
IL
Low Level Input
Voltage
1.65 to 1.95
0.35 Vcc
0.35 Vcc
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
I
O
=-100
A
V
CC
-0.2
V
CC
-0.2
V
1.65
I
O
=-4 mA
1.2
1.2
2.3
I
O
=-6 mA
2.0
2.0
2.3
I
O
=-12 mA
1.7
1.7
2.7
I
O
=-12 mA
2.2
2.2
3.0
I
O
=-12 mA
2.4
2.4
3.0
I
O
=-24 mA
2.0
2.0
V
OL
Low Level Output
Voltage
1.65 to 3.6
I
O
=100
A
0.2
0.2
V
1.65
I
O
=4 mA
0.45
0.45
2.3
I
O
=6 mA
0.4
0.4
2.3
I
O
=12 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 or 3.6V
5
5
A
I
IHOLD
Input Hold Current
1.65
V
I
=0.58 V
+ 25
+ 25
A
1.65
V
I
=1.07 V
- 25
- 25
2.3
V
I
=0.7 V
+ 45
+ 45
2.3
V
I
=1.7 V
- 45
- 45
3.0
V
I
=0.8 V
+ 75
+ 75
3.0
V
I
=2 V
- 75
- 75
3.6
V
I
= 0 to 3.6V
500
500
I
off
Power Off Leakage
Current
0
V
I
or V
O
= 3.6V
10
20
A
I
OZ
High Impedance
Output Leakage
Current
3.6
V
I
= V
IH
or V
IL
V
O
= 0 to V
CC
5
10
A
I
CC
Quiescent Supply
Current
3.6
V
I
= V
CC
or GND
I
O
= 0
20
40
A
I
CC
I
CC
incr. per Input
3.0 to 3.6
V
IH
= V
CC
- 0.6V
500
750
A
74ALVCH16244
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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
1.65 to 1.95
30
1000
2.0
1
5.1
1
5.1
ns
2.3 to 2.7
30
500
2.0
1
3.7
1
3.7
2.7
50
500
2.5
1
3.6
1
3.6
3.0 to 3.6
50
500
2.5
1
3.0
1
3.0
t
PZL
t
PZH
Output Enable Time
1.65 to 1.95
30
1000
2.0
1
7.1
1
7.1
2.3 to 2.7
30
500
2.0
1
5.7
1
5.7
2.7
50
500
2.5
1
5.4
1
5.4
3.0 to 3.6
50
500
2.5
1
4.4
1
4.4
t
PLZ
t
PHZ
Output Disable Time
1.65 to 1.95
30
1000
2.0
1
6.5
1
6.5
2.3 to 2.7
30
500
2.0
1
5.2
1
5.2
2.7
50
500
2.5
1
4.6
1
4.6
3.0 to 3.6
50
500
2.5
1
4.1
1
4.1
Symbol
Parameter
Test Condition
Value
Unit
V
CC
(V)
T
A
= 25 C
Min.
Typ.
Max.
C
IN
Input Capacitance Control
Inputs
3.3
V
IN
=V
CC
or GND
3
pF
C
IN
Input Capacitance Data Inputs
3.3
V
IN
=V
CC
or GND
6
pF
C
OUT
Output Capacitance
3.3
V
IN
= 0 to V
CC
7
pF
C
PD
Power Dissipation Capacitance
Output enabled (note 1)
3.3
f
IN
= 10MHz
C
L
=50pF
V
IN
= 0 or V
CC
19
pF
2.5
16
C
PD
Power Dissipation Capacitance
Output disabled (note 1)
3.3
5
2.5
4
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