changes the output impedance, resulting in noise
reduction without speed degradation
• Low inductancemultiple VCCand GND pins to minimize
noise and ground bounce
• Supports Live Insertion
• All data inputs have bus-hold.
74AVCH16244
DESCRIPTION
The 74AVCH16244 is a 16-bit non-inverting buffer/line
driverwith 3-state outputs. The devicecan 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
inputsnOE.AHIGHonnOEcausestheoutputstoassume
a high impedance OFF-state.
The 74AVCH16244 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, nOE should be tied to V
through a pull-up resistor (Live Insertion).
A Dynamic Controlled Output (DCO) circuitry is
implemented to support termination line drive during
transient (see Figs 1 and 2).
The 74AVCH16244 has active bus-hold circuitry to hold
unused or floating data inputs at a valid logic level. This
feature eliminates the need for external pull-up or
pull-down resistors.
CC
handbook, halfpage
0
I
OH
(mA)
1.8 V
−100
2.5 V
−200
3.3 V
−300
0124
Fig.1Output voltage as a function of the
HIGH-level output current.
3
VOH (V)
MNA506
300
handbook, halfpage
I
OL
(mA)
200
100
0
0124
1.8 V
3.3 V
2.5 V
Fig.2Output voltage as a function of the
LOW-level output current.
3
MNA507
VOL (V)
2000 Mar 072
Page 3
Philips SemiconductorsProduct Specification
16-bit buffer/line driver; 3.6 V tolerant;
74AVCH16244
3-state
QUICK REFERENCE DATA
GND = 0 V; T
SYMBOLPARAMETERCONDITIONSTYP.UNIT
t
PHL/tPLH
C
I
C
PD
Notes
1. C
is used to determine the dynamic power dissipation (PDin µW).
PD
PD=CPD× V
fi= input frequency in MHz;
fo= output frequency in MHz;
CL= output load capacitance in pF;
VCC= supply voltage in Volts;
∑ (CL× V
2. The condition is VI= GND to VCC.
=25°C; tr=tf≤2.0 ns.
amb
propagation delay nAnto nY
n
VCC= 1.2 V5.2ns
V
= 1.5 V2.9ns
CC
V
= 1.8 V2.1ns
CC
= 2.5 V1.5ns
V
CC
V
= 3.3 V1.3ns
CC
input capacitance5.0pF
power dissipation capacitance per buffer notes 1 and 2
outputs enabled34pF
outputs disabled1pF
2
× fi+ ∑ (CL× V
CC
2
× fo) = sum of outputs.
CC
2
× fo) where:
CC
FUNCTION TABLE
See note 1.
INPUTSOUTPUTS
n
OEnA
LLL
LHH
HXZ
Note
1. H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
Z = high impedance OFF-state.
n
nY
n
2000 Mar 073
Page 4
Philips SemiconductorsProduct Specification
16-bit buffer/line driver; 3.6 V tolerant;
74AVCH16244
3-state
ORDERING AND PACKAGE INFORMATION
TYPE NUMBER
TEMPERATURE RANGEPINSPACKAGEMATERIALCODE
74AVCH16244DGG−40 to +85 °C48TSSOPplasticSOT362-1
PINNING
PINSYMBOLDESCRIPTION
11
2, 3, 5 and 61Y
OEoutput enable input (active LOW)
to 1Y
0
3
data outputs
4, 10, 15, 21, 28, 34, 39 and 45GNDground (0 V)
7, 18, 31 and 42V
8, 9, 11 and 122Y
13, 14, 16 and 173Y
19, 20, 22 and 234Y
244
253
26, 27, 29 and 304A
32, 33, 35 and 363A
37, 38, 40 and 412A
43, 44, 46 and 471A
482
16-bit buffer/line driver; 3.6 V tolerant;
3-state
handbook, halfpage
1OE
1Y
1Y
GND
1Y
1Y
V
CC
2Y
2Y
GND
2Y
2Y
3Y
3Y
GND
3Y
3Y
V
CC
4Y
4Y
GND
4Y
4Y
4OE
1
2
0
3
1
4
5
2
6
3
7
8
0
9
1
10
11
2
12
3
0
1
2
3
0
1
2
3
16244
13
14
15
16
17
18
19
20
21
22
23
24
MNA501
2OE
48
1A
47
0
1A
46
1
GND
45
1A
44
2
1A
43
3
V
42
CC
2A
41
0
2A
40
1
GND
39
2A
38
2
2A
37
3
3A
36
0
3A
35
1
GND
34
3A
33
2
3A
32
3
V
31
CC
4A
30
0
4A
29
1
GND
28
4A
27
2
4A
26
3
3OE
25
handbook, halfpage
handbook, halfpage
74AVCH16244
nA
0
nA
1
nA
2
nA
3
nOE
Fig.4 Logic symbol.
1
1EN
48
2EN
25
3EN
24
4EN
47
46
44
43
41
40
38
37
36
35
33
32
30
29
27
26
11
21
31
41
nY
nY
nY
nY
MNA502
11
12
13
14
16
17
19
20
22
23
0
1
2
3
2
3
5
6
8
9
Fig.3 Pin configuration.
2000 Mar 075
MNA503
Fig.5 IEEE/IEC logic symbol.
Page 6
Philips SemiconductorsProduct Specification
16-bit buffer/line driver; 3.6 V tolerant;
74AVCH16244
3-state
RECOMMENDED OPERATING CONDITIONS
SYMBOLPARAMETERCONDITIONSMIN.MAX.UNIT
V
CC
DC supply voltageaccording to JEDEC Low
Voltage Standards
for low-voltage applications1.23.6V
V
I
V
O
DC input voltage03.6V
DC output voltageoutput 3-state03.6V
output HIGH or LOW state0V
T
amb
, t
t
r
f
operating ambient temperaturein free air−40+85°C
input rise and fall ratiosVCC= 1.4 to 1.6 V040ns/V
V
= 1.65 to 2.3 V030ns/V
CC
V
= 2.3 to 3.0 V020ns/V
CC
V
= 3.0 to 3.6 V010ns/V
CC
1.41.6V
1.651.95V
2.32.7V
3.03.6V
CC
V
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 60134); voltages are referenced to GND (ground = 0 V).
SYMBOLPARAMETERCONDITIONSMIN.MAX.UNIT
V
CC
I
IK
V
I
I
OK
V
O
DC supply voltage−0.5+4.6V
DC input diode currentVI<0−−50mA
DC input voltagefor inputs; note 1−0.5+4.6V
DC output clamping diode currentVO<0−−50mA
DC output voltageoutput HIGH or LOW state;
−0.5VCC+ 0.5 V
note 1
output 3-state; note 1−0.5+4.6V
I
O
, I
I
CC
GND
T
stg
P
D
DC output sink currentVO=0toV
CC
−50mA
DC VCC or GND current−±100mA
storage temperature−65+150°C
power dissipation per packagefor temperature range:
−500mW
−40 to +85 °C; note 2
Notes
1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. Above 60 °C the value of PD derates linearly with 5.5 mW/K.
2000 Mar 076
Page 7
Philips SemiconductorsProduct Specification
16-bit buffer/line driver; 3.6 V tolerant;
3-state
DC CHARACTERISTICS
Over recommended operating conditions; voltages are referenced to GND (ground=0V).
SYMBOLPARAMETER
V
IH
HIGH-levelinput
voltage
V
IL
LOW-level input
voltage
V
OH
HIGH-level
output voltage
V
OL
LOW-level
output voltage
I
I
input leakage
current per pin
I
off
power-off
leakage current
I
IHZ/IILZ
input current for
common I/O
pins
I
OZ
3-state output
OFF-state
current
I
CC
quiescent
supply current
I
BHL
bus-hold LOW
sustaining
current
TEST CONDITIONST
OTHERVCC (V)MIN.TYP.
1.2V
CC
1.4 to 1.60.65 × V
1.65 to 1.95 0.65 × V
2.3 to 2.71.71.2−V
3.0 to 3.62.01.5−V
1.2−−GNDV
1.4 to 1.6−0.90.35 × V
1.65 to 1.95 −0.90.35 × V
2.3 to 2.7−1.20.7V
3.0 to 3.6−1.50.8V
VI=VIH or V
IL
IO= −100 µA1.65 to 3.6VCC− 0.20V
I
= −3 mA1.4VCC− 0.35VCC− 0.21−V
O
= −4 mA1.65VCC− 0.45VCC− 0.25−V
I
O
I
= −8 mA2.3VCC− 0.55VCC− 0.37−V
O
I
= −12 mA3.0VCC− 0.70VCC− 0.47−V
O
VI=VIH or V
IL
IO= 100 µA1.65 to 3.6−GND0.20V
I
=3mA1.4−0.220.35V
O
= 4 mA1.65−0.240.45V
I
O
I
=8mA2.3−0.380.55V
O
I
=12mA3.0−0.530.70V
O
VI=VCC or GND1.4 to 3.6−0.12.5µA
VIor VO= 3.6 V0−0.1±10µA
VI=VCC or GND1.4 to 3.6−0.112.5µA
VI=VIH or VIL;
VO=VCC or GND
1.4 to 2.7−0.15µA
3.0 to 3.6−0.110µA
VI=VCCor GND; IO= 0 1.4 to 2.7−0.120µA
3.0 to 3.6−0.240µA
VI= 0.35 × V
= 0.7 V2.345−−µA
V
I
V
= 0.8 V3.075−−µA
I
CC
1.6525−−µA
= −40 to +85 °C
amb
−−V
0.9−V
CC
0.9−V
CC
CC
74AVCH16244
(1)
MAX.
CC
CC
−V
UNIT
V
V
2000 Mar 077
Page 8
Philips SemiconductorsProduct Specification
16-bit buffer/line driver; 3.6 V tolerant;
3-state
SYMBOLPARAMETER
I
BHH
bus-hold HIGH
VI= 0.65 × V
sustaining
current
I
BHLO
bus-hold LOW
overdrive
current
I
BHHO
bus-hold HIGH
overdrive
current
Note
1. All typical values are measured at T
AC CHARACTERISTICS
GND = 0 V; tr=tf≤2.0 ns.
TEST CONDITIONST
OTHERVCC (V)MIN.TYP.
CC
=25°C.
amb
74AVCH16244
= −40 to +85 °C
amb
(1)
MAX.
1.65−25−−µA
2.3−45−−µA
3.0−75−−µA
1.95200−−µA
2.7300−−µA
3.6450−−µA
1.95−200−−µA
2.7−300−−µA
3.6−450−−µA
UNIT
SYMBOLPARAMETER
WAVEFORMSVCC(V)MIN.TYP.
t
PHL/tPLH
propagation
see Figs 6 and 81.2−5.2−ns
delay;
t
PZH/tPZL
nAnto nY
3-state output
n
see Figs 7 and 81.2−5.7−ns
enable time;
t
PHZ/tPLZ
nOE to nY
3-state output
n
see Figs 7 and 81.2−5.9−ns
disable time;
nOE to nY
n
Note
1. All typical values are measured at T
TEST CONDITIONST
= −40 to +85 °C
amb
(1)
1.40 to 1.60 −2.9−ns
1.65 to 1.95 0.82.13.4ns
2.3 to 2.70.71.52.2ns
3.0 to 3.60.61.32.0ns
1.40 to 1.60 −4.0−ns
1.65 to 1.95 1.33.36.8ns
2.3 to 2.70.92.24.0ns
3.0 to 3.60.71.93.5ns
1.40 to 1.60 −4.2−ns
1.65 to 1.95 1.63.76.2ns
2.3 to 2.71.01.94.3ns
3.0 to 3.61.12.23.5ns
=25°C and at VCCrespectively 1.2, 1.5, 1.8, 2.5 and 3.3 V.
amb
MAX.
UNIT
2000 Mar 078
Page 9
Philips SemiconductorsProduct Specification
16-bit buffer/line driver; 3.6 V tolerant;
3-state
AC WAVEFORMS
CC
CC
GND
V
V
V
I
OH
OL
V
I
handbook, halfpage
nAn input
nYn output
V
CC
≤2.3 to 2.7 V0.5 × V
3.0 to 3.6 V0.5× V
VOL and VOH are typical output voltage drop that occur with the output load.
V
M
CC
CC
V
V
74AVCH16244
V
M
t
PHL
V
M
t
PLH
MNA504
handbook, full pagewidth
V
CC
≤2.3 to 2.7 V0.5 × V
3.0 to 3.6 V0.5 × V
Fig.6 The input (nAn) to output (nYn) propagation delay.
V
I
nOE input
output
LOW-to-OFF
OFF-to-LOW
output
HIGH-to-OFF
OFF-to-HIGH
V
M
CC
CC
GND
V
CC
V
OL
V
OH
GND
VOL+ 0.15 VVOH− 0.15 VV
VOL+ 0.3 VVOH− 0.3 VV
V
M
t
PLZ
V
X
t
PHZ
V
Y
outputs
enabled
V
X
V
Y
outputs
disabled
CC
CC
V
I
t
PZL
t
PZH
V
M
V
M
outputs
enabled
MNA478
VOL and VOH are typical output voltage drop that occur with the output load.
Fig.7 The 3-state enable and disable times.
2000 Mar 079
Page 10
Philips SemiconductorsProduct Specification
16-bit buffer/line driver; 3.6 V tolerant;
3-state
16-bit buffer/line driver; 3.6 V tolerant;
3-state
PACKAGE OUTLINE
TSSOP48: plastic thin shrink small outline package; 48 leads; body width 6.1 mm
D
c
y
Z
4825
H
74AVCH16244
SOT362-1
E
E
A
X
v M
A
A
2
A
1
pin 1 index
L
p
L
0.50
0.35
detail X
0.08
124
w M
b
e
DIMENSIONS (mm are the original dimensions).
mm
A
max.
1.2
0.15
0.05
1.05
0.85
0.25
b
0.28
0.17
p
cD
0.2
0.2
0.1
0.1
3
UNITA1A2A
Notes
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
2. Plastic interlead protrusions of 0.25 mm maximum per side are not included.
p
0
(1)E(2)
12.6
12.4
2.5
scale
eHELLpQZywvθ
6.2
0.510.25
6.0
8.3
7.9
5 mm
0.8
0.4
Q
(A )
3
A
θ
0.1
0.8
0.4
o
8
o
0
OUTLINE
VERSION
SOT362-1
IEC JEDEC EIAJ
REFERENCES
MO-153
2000 Mar 0711
EUROPEAN
PROJECTION
ISSUE DATE
95-02-10
99-12-27
Page 12
Philips SemiconductorsProduct Specification
16-bit buffer/line driver; 3.6 V tolerant;
3-state
SOLDERING
Introduction to soldering surface mount packages
Thistextgivesaverybriefinsighttoacomplextechnology.
A more in-depth account of soldering ICs can be found in
our
“Data Handbook IC26; Integrated Circuit Packages”
(document order number 9398 652 90011).
There is no soldering method that is ideal for all surface
mount IC packages. Wave solderingis not always suitable
for surface mount ICs, or for printed-circuit boards with
high population densities. In these situations reflow
soldering is often used.
Reflow soldering
Reflow soldering requires solder paste (a suspension of
fine solder particles, flux and binding agent) to be applied
totheprinted-circuit board by screen printing, stencilling or
pressure-syringe dispensing before package placement.
Several methods exist for reflowing; for example,
infrared/convection heating in a conveyor type oven.
Throughput times (preheating, soldering and cooling) vary
between 100 and 200 seconds depending on heating
method.
Typical reflow peak temperatures range from
215 to 250 °C. The top-surface temperature of the
packages should preferable be kept below 230 °C.
Wave soldering
Conventional single wave soldering is not recommended
forsurfacemountdevices(SMDs)orprinted-circuitboards
with a high component density, as solder bridging and
non-wetting can present major problems.
To overcome these problems the double-wave soldering
method was specifically developed.
74AVCH16244
If wave soldering is used the following conditions must be
observed for optimal results:
• Use a double-wave soldering method comprising a
turbulent wave with high upward pressure followed by a
smooth laminar wave.
• For packages with leads on two sides and a pitch (e):
– larger than or equal to 1.27 mm, the footprint
longitudinal axis is preferred to be parallel to the
transport direction of the printed-circuit board;
– smaller than 1.27 mm, the footprint longitudinal axis
must be parallel to the transport direction of the
printed-circuit board.
The footprint must incorporate solder thieves at the
downstream end.
• Forpackageswithleadsonfoursides,thefootprintmust
be placed at a 45° angle to the transport direction of the
printed-circuit board. The footprint must incorporate
solder thieves downstream and at the side corners.
During placement and before soldering, the package must
be fixed with a droplet of adhesive. The adhesive can be
applied by screen printing, pin transfer or syringe
dispensing. The package can be soldered after the
adhesive is cured.
Typical dwell time is 4 seconds at 250 °C.
A mildly-activated flux will eliminate the need for removal
of corrosive residues in most applications.
Manual soldering
Fix the component by first soldering two
diagonally-opposite end leads. Use a low voltage (24 V or
less) soldering iron applied to the flat part of the lead.
Contact time must be limited to 10 seconds at up to
300 °C.
When using a dedicated tool, all other leads can be
soldered in one operation within 2 to 5 seconds between
270 and 320 °C.
2000 Mar 0712
Page 13
Philips SemiconductorsProduct Specification
16-bit buffer/line driver; 3.6 V tolerant;
74AVCH16244
3-state
Suitability of surface mount IC packages for wave and reflow soldering methods
1. All surface mount (SMD) packages are moisture sensitive. Depending upon the moisture content, the maximum
2. These packages are not suitable for wave soldering as a solder joint between the printed-circuit board and heatsink
3. If wave soldering is considered, then the package must be placed at a 45° angle to the solder wave direction.
4. Wave soldering is only suitable for LQFP, TQFP and QFP packages with a pitch (e) equal to or larger than 0.8 mm;
5. Wave soldering is only suitable for SSOP and TSSOP packages with a pitch (e) equal to or larger than 0.65 mm; it is
, SO, SOJsuitablesuitable
temperature (with respect to time) and body size of the package, there is a risk that internal or external package
cracks may occur due to vaporization of the moisture in them (the so called popcorn effect). For details, refer to the
Drypack information in the
(at bottom version) can not be achieved, and as solder may stick to the heatsink (on top version).
The package footprint must incorporate solder thieves downstream and at the side corners.
it is definitely not suitable for packages with a pitch (e) equal to or smaller than 0.65 mm.
definitely not suitable for packages with a pitch (e) equal to or smaller than 0.5 mm.
Objective specificationThis data sheet contains target or goal specifications for product development.
Preliminary specificationThis data sheet contains preliminary data; supplementary data may be published later.
Product specificationThis data sheet contains final product specifications.
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
2000 Mar 0713
Page 14
Philips SemiconductorsProduct Specification
16-bit buffer/line driver; 3.6 V tolerant;
3-state
NOTES
74AVCH16244
2000 Mar 0714
Page 15
Philips SemiconductorsProduct Specification
16-bit buffer/line driver; 3.6 V tolerant;
3-state
NOTES
74AVCH16244
2000 Mar 0715
Page 16
Philips Semiconductors – a w orldwide compan y
Argentina: see South America
Australia: 3 Figtree Drive, HOMEBUSH, NSW 2140,
United States: 811 East Arques Avenue, SUNNYVALE, CA 94088-3409,
Tel. +1 800 234 7381, Fax. +1 800 943 0087
Uruguay: see South America
Vietnam: see Singapore
Yugoslavia: PHILIPS, Trg N. Pasica 5/v, 11000 BEOGRAD,
Tel. +381 11 3341 299, Fax.+381 11 3342 553
For all other countries apply to: Philips Semiconductors,
International Marketing & Sales Communications, Building BE-p, P.O. Box 218,
5600 MD EINDHOVEN, The Netherlands, Fax. +31 40 27 24825
The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed
without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license
under patent- or other industrial or intellectual property rights.
2000
Internet: http://www.semiconductors.philips.com
69
Printed in The Netherlands245004/01/pp16 Date of release:2000 Mar 07Document order number: 9397 750 06759
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