2001 Fairchild Semiconductor Corporation
DS500697
www.fairchildsemi.com
November 2001
Revised November 2001
7
4
AL
VC1682
7 Low
V
o
l
t
a
g
e 20-
Bit
Buf
f
e
r
/L
ine
Dri
ver
w
i
t
h
3.
6V T
o
l
e
rant
Input
s an
d Outp
uts
74ALVC16827
Low Voltage 20-Bit Buffer/Line Driver
with 3.6V Tolerant Inputs and Outputs
General Description
The ALVC16827 contains twenty non-inverting buffers with
3-STATE outputs to be employed as a memory and
address driver, clock driver, or bus oriented transmitter/
receiver carrying parity. The device is byte controlled. Each
byte has NOR output enables for maximum control flexibil-
ity.
The 74ALVC16827 is designed for low voltage (1.65V to
3.6V) V
CC
applications with I/O capability up to 3.6V.
The 74ALVC16827 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain-
ing low CMOS power dissipation.
Features
s
1.65V to 3.6V V
CC
supply operation
s
3.6V tolerant inputs and outputs
s
t
PD
3.0 ns max for 3.0V to 3.6V V
CC
3.5 ns max for 2.3V to 2.7V V
CC
6.0 ns max for 1.65V to 1.95V V
CC
s
Power-off high impedance inputs and outputs
s
Supports live insertion and withdrawal (Note 1)
s
Uses patented noise/EMI reduction circuitry
s
Latchup conforms to JEDEC JED78
s
ESD performance:
Human body model
>
2000V
Machine model
>
200V
Note 1: To ensure the high-impedance state during power up or power
down, OE should be tied to V
CC
through a pull-up resistor; the minimum
value of the resistor is determined by the current-sourcing capability of the
driver.
Ordering Code:
Devices also available on Tape and Reel. Specify by appending the suffix letter "X" to the ordering code.
Logic Symbol
Pin Descriptions
Order Number
Package Number
Package Description
74ALVC16827MTD
MTD56
56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Pin Names
Description
OE
n
Output Enable Input (Active LOW)
I
0
I
19
Inputs
O
0
O
19
Outputs
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2
74
A
L
VC16827
Connection Diagram
Truth Tables
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial (HIGH or LOW, inputs may not float)
Z
=
High Impedance
Functional Description
The 74ALVC16827 contains twenty non-inverting buffers
with 3-STATE outputs. The device is byte controlled with
each byte functioning identically, but independent of each
other. The control pins may be shorted together to obtain
full 16-bit operation. The 3-STATE outputs are controlled by
Output Enable (OE
n
) inputs. When OE
1
, and OE
2
are
LOW, O
0
--O
10
are in the 2-state mode. When either OE
1
or OE
2
are HIGH, the standard outputs are in the high
impedance mode but this does not interfere with entering
new data into the inputs. The same applies for byte two
with OE
3
and OE
4
.
Logic Diagrams
Inputs
Outputs
OE
1
OE
2
I
0
I
9
O
0
O
9
L
L
L
L
L
L
H
H
H
X
X
Z
X
H
X
Z
Inputs
Outputs
OE
3
OE
4
I
0
I
9
O
10
O
19
L
L
L
L
L
L
H
H
H
X
X
Z
X
H
X
Z
3
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4
AL
VC1682
7
Absolute Maximum Ratings
(Note 2)
Recommended Operating
Conditions
(Note 4)
Note 2: The Absolute Maximum Ratings are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the Absolute Maximum Rat-
ings. The "Recommended Operating Conditions" table will define the condi-
tions for actual device operation.
Note 3: I
O
Absolute Maximum Rating must be observed, limited to 4.6V.
Note 4: Floating or unused control inputs must be held HIGH or LOW.
DC Electrical Characteristics
Supply Voltage (V
CC
)
-
0.5V to
+
4.6V
DC Input Voltage (V
I
)
-
0.5V to 4.6V
Output Voltage (V
O
) (Note 3)
-
0.5V to V
CC
+
0.5V
DC Input Diode Current (I
IK
)
V
I
<
0V
-
50 mA
DC Output Diode Current (I
OK
)
V
O
<
0V
-
50 mA
DC Output Source/Sink Current
(I
OH
/I
OL
)
50 mA
DC V
CC
or GND Current per
Supply Pin (I
CC
or GND)
100 mA
Storage Temperature Range (T
STG
)
-
65
C to
+
150
C
Power Supply
Operating
1.65V to 3.6V
Input Voltage (V
I
)
0V to V
CC
Output Voltage (V
O
)
0V to V
CC
Free Air Operating Temperature (T
A
)
-
40
C to
+
85
C
Minimum Input Edge Rate (
t/
V)
V
IN
=
0.8V to 2.0V, V
CC
=
3.0V
10 ns/V
Symbol
Parameter
Conditions
V
CC
Min
Max
Units
(V)
V
IH
HIGH Level Input Voltage
1.65 - 1.95
0.65 x V
CC
V
2.3 - 2.7
1.7
2.7 - 3.6
2.0
V
IL
LOW Level Input Voltage
1.65 - 1.95
0.35 x V
CC
V
2.3 - 2.7
0.7
2.7 - 3.6
0.8
V
OH
HIGH Level Output Voltage
I
OH
=
-
100
A
1.65 - 3.6
V
CC
- 0.2
V
I
OH
=
-
4 mA
1.65
1.2
I
OH
=
-
6 mA
2.3
2.0
I
OH
=
-
12 mA
2.3
1.7
2.7
2.2
3.0
2.4
I
OH
=
-
24 mA
3.0
2
V
OL
LOW Level Output Voltage
I
OL
=
100
A
1.65 - 3.6
0.2
V
I
OL
=
4 mA
1.65
0.45
I
OL
=
6 mA
2.3
0.4
I
OL
=
12 mA
2.3
0.7
2.7
0.4
I
OL
=
24 mA
3.0
0.55
I
I
Input Leakage Current
0
V
I
3.6V
3.6
5.0
A
I
OZ
3-STATE Output Leakage
0
V
O
3.6V
3.6
10
A
I
CC
Quiescent Supply Current
V
I
=
V
CC
or GND, I
O
=
0
3.6
40
A
I
CC
Increase in I
CC
per Input
V
IH
=
V
CC
-
0.6V
3 - 3.6
750
A
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4
74
A
L
VC16827
AC Electrical Characteristics
Capacitance
Symbol
Parameter
T
A
=
-
40
C to
+
85
C, R
L
=
500
Units
C
L
=
50 pF
C
L
=
30 pF
V
CC
=
3.3V
0.3V
V
CC
=
2.7V
V
CC
=
2.5V
0.2V
V
CC
=
1.8V
0.15V
Min
Max
Min
Max
Min
Max
Min
Max
t
PHL
, t
PLH
Propagation Delay
1.3
3
1.5
3.5
1.0
3.0
1.5
6.0
ns
t
PZL
, t
PZH
Output Enable Time
1.3
4.3
1.5
5.4
1.0
4.9
1.5
9.8
ns
t
PLZ
, t
PHZ
Output Disable Time
1.3
4.2
1.5
4.7
1.0
4.2
1.5
7.6
ns
Symbol
Parameter
Conditions
T
A
=
+
25
C
Units
V
CC
Typical
C
IN
Input Capacitance
V
I
=
0V or V
CC
3.3
6
pF
C
OUT
Output Capacitance
V
I
=
0V or V
CC
3.3
7
pF
C
PD
Power Dissipation Capacitance
Outputs Enabled f
=
10 MHz, C
L
=
0 pF
3.3
20
pF
2.5
20
5
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7
4
AL
VC1682
7
AC Loading and Waveforms
FIGURE 1. AC Test Circuit
TABLE 1. Values for Figure 1
TABLE 2. Variable Matrix
(Input Characteristics: f
=
1MHz; t
r
=
t
f
=
2ns; Z
0
=
50
)
FIGURE 2. Waveform for Inverting and Non-Inverting Functions
FIGURE 3. 3-STATE Output High Enable and Disable Times for Low Voltage Logic
FIGURE 4. 3-STATE Output Low Enable and Disable Times for Low Voltage Logic
TEST
SWITCH
t
PLH
, t
PHL
Open
t
PZL
, t
PLZ
V
L
t
PZH
, t
PHZ
GND
Symbol
V
CC
3.3V
0.3V
2.7V
2.5V
0.2V
1.8V
0.15V
V
mi
1.5V
1.5V
V
CC
/2
V
CC
/2
V
mo
1.5V
1.5V
V
CC
/2
V
CC
/2
V
X
V
OL
+
0.3V
V
OL
+
0.3V
V
OL
+
0.15V
V
OL
+
0.15V
V
Y
V
OH
-
0.3V
V
OH
-
0.3V
V
OH
-
0.15V
V
OH
-
0.15V
V
L
6V
6V
V
CC
*2
V
CC
*2
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