Philips Semiconductors
Product specification
16-bit buffer/line driver; 3-state
(3.6 V tolerant)
FEATURES
•
Wide supply voltage range from 1.2 to 3.6 V
•
Complies with JEDEC standard no. 8-1A/5/7
•
CMOS low power consumption
•
Input/output tolerant up to 3.6 V
•
Dynamic Controlled Output (DCO) circuit dynamically
changes output impedance, resulting in noise reduction
without speed degradation
•
Low inductance multiple power and ground pins for
minimum noise and ground bounce
•
Power off disables 74AVC16244 outputs, permitting live
insertion.
DESCRIPTION
74AVC16244
The 74AVC16244 is a 16-bit non-inverting buffer/line
driver with 3-state outputs. This device can be used as four
4-bit buffers, two 8-bit buffers or one 16-bit buffer.
The 3-state outputs are controlled by the output enable
inputs nOE. A HIGH level on input nOE causes the outputs
to assume a high-impedance OFF-state.
This product is designed to have an extremely fast
propagation delay and a minimum amount of power
consumption.
To ensure the high-impedance output state during
power-up or power-down, input nOE should be tied to V
CC
through a pull-up resistor (live insertion).
A DCO circuitry is implemented to support termination line
drive during transient (see Figs 1 and 2).
MNA506
handbook, halfpage
0
MNA507
handbook, halfpage
300
I OH
(mA)
1.8 V
−100
I OL
(mA)
200
2.5 V
2.5 V
3.3 V
−200
100
1.8 V
3.3 V
−300
0
0
1
2
3
VOH (V)
4
0
1
2
3
VOL (V)
4
Fig.1 Output current as a function of output voltage.
Fig.2 Output current as a function of output voltage.
1999 Nov 15
2
Philips Semiconductors
Product specification
16-bit buffer/line driver; 3-state
(3.6 V tolerant)
QUICK REFERENCE DATA
GND = 0 V; T
amb
= 25
°C;
t
r
= t
f
≤
2.0 ns; C
L
= 30 pF.
SYMBOL
t
PHL
/t
PLH
PARAMETER
propagation delay
nA
n
to nY
n
CONDITIONS
V
CC
= 1.2 V
V
CC
= 1.5 V
V
CC
= 1.8 V
V
CC
= 2.5 V
V
CC
= 3.3 V
C
I
C
PD
input capacitance
power dissipation
capacitance per buffer
notes 1 and 2
outputs enabled
outputs disabled
Notes
1. C
PD
is used to determine the dynamic power dissipation (P
D
in
µW).
P
D
= C
PD
×
V
CC2
×
f
i
+
∑
(C
L
×
V
CC2
×
f
o
) where:
f
i
= input frequency in MHz;
f
o
= output frequency in MHz;
C
L
= output load capacitance in pF;
V
CC
= supply voltage in Volts;
∑
(C
L
×
V
CC2
×
f
o
) = sum of outputs.
2. The condition is V
I
= GND to V
CC
.
FUNCTION TABLE
See note 1.
INPUTS
nOE
L
L
H
Note
1. H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
Z = high-impedance OFF-state.
nA
n
L
H
X
34
1
2.6
1.8
1.7
1.3
1.1
5.0
TYP.
74AVC16244
UNIT
ns
ns
ns
ns
ns
pF
pF
pF
OUTPUTS
nY
n
L
H
Z
1999 Nov 15
3
Philips Semiconductors
Product specification
16-bit buffer/line driver; 3-state
(3.6 V tolerant)
ORDERING INFORMATION
PACKAGE
TYPE NUMBER
TEMPERATURE RANGE
74AVC16244DGG
PINNING
PIN
1
2, 3, 5 and 6
4, 10, 15, 21, 28, 34, 39 and 45
7, 18, 31 and 42
8, 9, 11 and 12
13, 14, 16 and 17
19, 20, 22 and 23
24
25
26, 27, 29 and 30
32, 33, 35 and 36
37, 38, 40 and 41
43, 44, 46 and 47
48
SYMBOL
1OE
1Y
0
to 1Y
3
GND
V
CC
2Y
0
to 2Y
3
3Y
0
to 3Y
3
4Y
0
to 4Y
3
4OE
3OE
4A
3
to 4A
0
3A
3
to 3A
0
2A
3
to 2A
0
1A
3
to 1A
0
2OE
data outputs
ground (0 V)
positive supply voltage
data outputs
data outputs
data outputs
−40
to +85
°C
PINS
48
PACKAGE
TSSOP
74AVC16244
MATERIAL
plastic
CODE
SOT362-1
DESCRIPTION
output enable input (active LOW)
output enable input (active LOW)
output enable input (active LOW)
data inputs
data inputs
data inputs
data inputs
output enable input (active LOW)
1999 Nov 15
4
Real-time operating system RTOS
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