Octal transceiver with direction pin;
30 Ω series termination resistors;
5 V input/output tolerant; 3-state
Product specification
Supersedes data of 1999 Mar 23
File under Integrated Circuits, IC24
1999 Jun 15
Page 2
Philips SemiconductorsProduct specification
Octal transceiver with direction pin; 30 Ω series
termination resistors; 5 V input/output tolerant; 3-state
FEATURES
• 5 V tolerant inputs/outputs for interfacing with 5 V logic
• Wide supply voltage range of 1.2 to 3.6 V
• CMOS low power consumption
• Direct interface with TTL levels
• Integrated 30 Ω termination resistors
DESCRIPTION
The 74LVC2245A is a high-performance, low-power,
low-voltage, Si-gate CMOS device, superior to most
advanced CMOS compatible TTL families.
Inputs can be driven from either 3.3 or 5 V devices.
In 3-state operation, outputs can handle 5 V. These
features allow the use of these devices as translators in a
mixed 3.3 V/5 V environment.
The 74LVC2245A is an octal transceiver featuring
non-inverting 3-state bus compatible outputs in both send
and receive directions. The ‘245’ features an output enable
OE) input for easy cascading and a send/receive (DIR)
(
input for direction control OE controls the outputs so that
the buses are effectively isolated.
The 74LVC2245A is designed with 30 Ω series termination
resistors in both HIGH and LOW output stages to reduce
line noise.
74LVC2245A
FUNCTION TABLE
See note 1.
INPUTINPUT/OUTPUT
OEDIRA
LLA = Binputs
LHinputsB = A
HX ZZ
Note
1. H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
Z = high-impedance OFF-state.
ORDERING INFORMATION
OUTSIDE NORTH
AMERICA
74LVC2245AD74LVC2245AD−40 to +85 °C20SOplasticSOT163-1
74LVC2245ADB74LVC2245ADB20SSOPplasticSOT339-1
74LVC2245APW74LVC2245APW DH20TSSOPplasticSOT360-1
NORTH AMERICA
TEMPERATURE
RANGE
n
PACKAGE
PINSPACKAGE MATERIALCODE
B
n
1999 Jun 152
Page 3
Philips SemiconductorsProduct specification
Octal transceiver with direction pin; 30 Ω series
74LVC2245A
termination resistors; 5 V input/output tolerant; 3-state
QUICK REFERENCE DATA
GND = 0 V; T
SYMBOLPARAMETERCONDITIONSTYPICALUNIT
t
PHL/tPLH
C
I
C
PD
Note
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 V;
Σ(CL× V
PINNING
=25°C; tr=tf≤2.5 ns.
amb
propagation delay Anto Bn; Bnto A
n
CL= 50 pF; VCC= 3.3 V3.9ns
input capacitance5.0pF
power dissipation capacitance per bufferVI= GND to VCC; note 127pF
Octal transceiver with direction pin; 30 Ω series
termination resistors; 5 V input/output tolerant; 3-state
handbook, halfpage
handbook, halfpage
DIR
1
A
2
0
A
3
1
A
4
2
A
5
A
A
A
A
GND
3
4
5
6
7
2245
6
7
8
9
10
MNA363
Fig.1 Pin configuration.
19
G3
3EN1 (BA)
1
3EN2 (AB)
1
2
4
5
6
7
8
2
MNA365
V
20
CC
19
OE
B
18
0
B
17
1
B
16
2
B
15
3
B
14
4
B
13
5
B
12
6
B
11
7
18
173
16
15
14
13
12
119
handbook, halfpage
DIR
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
A
9
74LVC2245A
OE
19
0
B
0
18
1
B
1
17
2
B
2
16
3
B
3
15
4
B
4
14
5
B
5
13
6
B
6
12
7
B
7
11
MNA364
Fig.3 IEC logic symbol.
1999 Jun 154
Fig.2 Logic symbol.
Page 5
Philips SemiconductorsProduct specification
Octal transceiver with direction pin; 30 Ω series
74LVC2245A
termination resistors; 5 V input/output tolerant; 3-state
RECOMMENDED OPERATING CONDITIONS
SYMBOLPARAMETERCONDITIONS
V
CC
DC supply voltage (for max. speed
performance)
DC supply voltage (for low-voltage
applications)
V
I
V
O
DC input voltage range05.5V
DC output voltage range; output HIGH or
LOW state
DC output voltage range; 3-state05.5V
T
amb
operating ambient temperature rangesee DC and AC characteristics per
device
t
r,tf
input rise and fall timesVCC= 1.2 to 2.7 V020ns/V
V
= 2.7 to 3.6 V010
CC
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134). Voltages are referenced to GND (ground = 0 V).
LIMITS
UNIT
MIN.MAX.
2.73.6V
1.23.6V
0VCCV
−40+85°C
SYMBOLPARAMETERCONDITIONSMIN.MAX.UNIT
V
CC
I
IK
V
I
I
OK
V
O
DC supply voltage−0.5+6.5V
DC input diode currentVI<0−−50mA
DC input voltagenote 1−0.5+5.5V
DC output diode currentVO>VCC or VO<0−±50mA
DC output voltage; output HIGH
note 1−0.5VCC+ 0.5 V
or LOW
DC output voltage; output 3-state note 1−0.5+6.5V
I
O
I
GND
T
P
stg
tot
DC output diode currentVO= 0 to V
, I
DC VCC or GND current−±100mA
CC
CC
−±50mA
storage temperature range−65+150°C
power dissipation per package
plastic mini-pack (SO)above +70 °C derate linearly with 8 mW/K−500mW
plastic shrink mini-pack (SSOP
and TSSOP)
above +60 °C derate linearly with
5.5 mW/K
−500mW
Note
1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
1999 Jun 155
Page 6
Philips SemiconductorsProduct specification
Octal transceiver with direction pin; 30 Ω series
74LVC2245A
termination resistors; 5 V input/output tolerant; 3-state
DC CHARACTERISTICS
Over recommended operating conditions; voltage are referenced to GND (ground = 0 V).
input leakage currentVI= 5.5 V or GND3.6−±0.1±5µA
3-state output OFF-state
current
VI=VIHor VIL;
VO= 5.5 V or GND
3.6−0.1±10µA
power off leakage supplyVIor VO= 5.5 V0.0−0.1±10µA
quiescent supply currentVI=VCCor GND; IO= 03.6−0.120µA
additional quiescent supply
VI=VCC− 0.6 V; IO= 02.7 to 3.6 −5500µA
current per control pin
(°C)
amb
−40 to +85
(1)
MAX.
−−V
CC
−
UNIT
Note
1. All typical values are at V
= 3.3 V and T
CC
amb
=25°C.
1999 Jun 156
Page 7
Philips SemiconductorsProduct specification
Octal transceiver with direction pin; 30 Ω series
termination resistors; 5 V input/output tolerant; 3-state
AC CHARACTERISTICS
GND = 0 V; t
SYMBOLPARAMETERWAVEFORMS
t
PHL/tPLH
t
PZH/tPZL
t
PHZ/tPLZ
Note
1. Typical values at V
AC WAVEFORMS
≤2.5 ns.
r=tf
propagation delay
Anto Bn;Bnto A
n
3-state output enable time
OE to An; OE to B
n
3-state output disable time
OE to An; OE to B
CC
n
= 3.3 V and T
= 3.3 V ±0.3 VVCC= 2.7 V
CC
MIN.TYP.
see Figs 4 and 61.53.96.51.57.5ns
see Figs 5 and 61.55.79.01.510.0ns
see Figs 5 and 61.54.25.91.56.9ns
=25°C.
amb
74LVC2245A
LIMITS
(1)
MAX.MIN.MAX.
UNITV
handbook, halfpage
An, B
INPUT
Bn, A
OUTPUT
VM= 1.5V at VCC≥ 2.7 V;
VM= 0.5 VCCat VCC< 2.7 V;
VOL and VOH are typical output voltage drop that occur with the output
load.
V
I
n
GND
t
V
OH
n
V
OL
PHL
V
M
V
M
Fig.4The input An to output Yn propagation
delays.
t
PLH
MNA366
1999 Jun 157
Page 8
Philips SemiconductorsProduct specification
Octal transceiver with direction pin; 30 Ω series
termination resistors; 5 V input/output tolerant; 3-state
handbook, full pagewidth
VM= 1.5 V at VCC≥ 2.7 V;
VM= 0.5VCCat VCC< 2.7 V;
VX=VOL+0.3VatVCC≥ 2.7 V;
VX=VOL+ 0.1VatVCC< 2.7 V;
OE INPUT
OUTPUT
LOW-to-OFF
OFF-to-LOW
OUTPUT
HIGH-to-OFF
OFF-to-HIGH
V
I
V
M
GND
t
PLZ
V
CC
V
V
OL
V
OH
GND
VY=VOH− 0.3VatVCC≥ 2.7 V;
VY=VOH− 0.1VatVCC< 2.7 V;
VOL and VOH are typical output voltage drop that occur with the output load.
t
PHZ
outputs
enabled
X
V
Y
outputs
disabled
t
PZL
t
PZH
74LVC2245A
V
M
V
M
outputs
enabled
MNA367
handbook, full pagewidth
TESTS
t
PLH/tPHL
t
PLZ/tPZL
t
PHZ/tPZH
open
2 × V
GND
1
CC
Fig.5 The 3-state enable and disable times.
PULSE
GENERATOR
V
CC
<2.7 VV
2.7 to 3.6 V2.7 V
S1
2 × V
CC
V
CC
V
I
R
CC
T
V
D.U.T.
I
V
O
C
50 pF
Definitions for test circuit:
RL= Load resistor; see Chapter “AC characteristics”.
CL= Load capacitance including jig and probe capacitance (see
Chapter “AC characteristics”).
= Termination resistance should be equal to the output
R
T
Impedance Z
R
L
500 Ω
R
L
L
500 Ω
of the pulse generator.
0
open
GND
MNA368
Fig.6 Load circuitry for switching times.
1999 Jun 158
Page 9
Philips SemiconductorsProduct specification
Octal transceiver with direction pin; 30 Ω series
termination resistors; 5 V input/output tolerant; 3-state
PACKAGE OUTLINES
SO20: plastic small outline package; 20 leads; body width 7.5 mm
D
c
y
Z
20
11
74LVC2245A
SOT163-1
E
H
E
A
X
v M
A
pin 1 index
1
e
0510 mm
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
mm
A
max.
2.65
0.10
A
1
0.30
0.10
0.012
0.004
A2A3b
2.45
0.25
2.25
0.096
0.01
0.089
0.49
0.36
0.019
0.014
p
cD
0.32
0.23
0.013
0.009
UNIT
inches
Note
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
10
w M
b
p
scale
(1)E(1)(1)
13.0
12.6
0.51
0.49
eHELLpQ
7.6
1.27
7.4
0.30
0.050
0.29
10.65
10.00
0.419
0.394
Q
A
2
0.055
A
1.4
1
detail X
1.1
1.1
1.0
0.4
0.043
0.043
0.039
0.016
(A )
L
p
L
0.25
0.01
A
3
θ
0.250.1
0.01
ywvθ
Z
0.9
0.4
8
0.004
0.035
0.016
0
o
o
OUTLINE
VERSION
SOT163-1
IEC JEDEC EIAJ
075E04 MS-013AC
REFERENCES
1999 Jun 159
EUROPEAN
PROJECTION
ISSUE DATE
95-01-24
97-05-22
Page 10
Philips SemiconductorsProduct specification
Octal transceiver with direction pin; 30 Ω series
termination resistors; 5 V input/output tolerant; 3-state
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm
D
c
y
Z
2011
E
H
E
74LVC2245A
SOT339-1
A
X
v M
A
pin 1 index
110
w M
b
e
DIMENSIONS (mm are the original dimensions)
mm
A
max.
2.0
0.21
0.05
1.80
1.65
0.25
b
3
p
0.38
0.25
UNITA1A2A
Note
1. Plastic or metal protrusions of 0.20 mm maximum per side are not included.
p
02.55 mm
cD
0.20
7.4
0.09
7.0
(1)E(1)
5.4
5.2
scale
eHELLpQ
0.65
7.9
7.6
Q
A
2
A
1
detail X
0.9
1.03
0.7
0.63
(A )
L
p
L
3
θ
0.131.250.20.1
A
(1)
Zywvθ
0.9
0.5
o
8
o
0
OUTLINE
VERSION
SOT339-1 MO-150AE
IEC JEDEC EIAJ
REFERENCES
1999 Jun 1510
EUROPEAN
PROJECTION
ISSUE DATE
93-09-08
95-02-04
Page 11
Philips SemiconductorsProduct specification
Octal transceiver with direction pin; 30 Ω series
termination resistors; 5 V input/output tolerant; 3-state
TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm
E
H
E
20
D
c
y
Z
11
74LVC2245A
A
X
v M
A
SOT360-1
pin 1 index
110
w M
b
e
DIMENSIONS (mm are the original dimensions)
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.
A
max.
0.15
mm
1.10
OUTLINE
VERSION
SOT360-1 MO-153AC
0.05
0.95
0.80
IEC JEDEC EIAJ
0.25
b
3
p
0.30
0.19
p
02.55 mm
scale
(1)E(2)(1)
cD
0.2
6.6
4.5
0.1
REFERENCES
6.4
4.3
0.65
eHELLpQZywv θ
A
6.6
6.2
Q
2
A
1
L
detail X
0.4
0.75
0.3
0.50
(A )
3
L
p
0.130.10.21.0
EUROPEAN
PROJECTION
A
θ
0.5
0.2
ISSUE DATE
93-06-16
95-02-04
o
8
o
0
1999 Jun 1511
Page 12
Philips SemiconductorsProduct specification
Octal transceiver with direction pin; 30 Ω series
termination resistors; 5 V input/output tolerant; 3-state
SOLDERING
Introduction to soldering surface mount packages
This text gives a very brief insight to a complex technology.
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 soldering is 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
to the printed-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
for surface mount devices (SMDs) or printed-circuit boards
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.
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.
• For packages with leads on four sides, the footprint must
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.
74LVC2245A
1999 Jun 1512
Page 13
Philips SemiconductorsProduct specification
Octal transceiver with direction pin; 30 Ω series
74LVC2245A
termination resistors; 5 V input/output tolerant; 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 134). 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.
1999 Jun 1513
Page 14
Philips SemiconductorsProduct specification
Octal transceiver with direction pin; 30 Ω series
termination resistors; 5 V input/output tolerant; 3-state
NOTES
74LVC2245A
1999 Jun 1514
Page 15
Philips SemiconductorsProduct specification
Octal transceiver with direction pin; 30 Ω series
termination resistors; 5 V input/output tolerant; 3-state
NOTES
74LVC2245A
1999 Jun 1515
Page 16
Philips Semiconductors – a worldwide company
Argentina: see South America
Australia: 34 Waterloo Road, NORTH RYDE, NSW 2113,
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 62 5344, Fax.+381 11 63 5777
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.
199966
Internet: http://www.semiconductors.philips.com
Printed in The Netherlands245004/02/pp16 Date of release: 1999Jun 15Document order number: 9397 75005624
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