Philips
Semiconductors
74LVT245
3.3V Octal transceiver with direction pin
(3-State)
Product specification
Supersedes data of 1994 May 20
IC23 Data Handbook
1998 Feb 19
INTEGRATED CIRCUITS
Philips Semiconductors
Product specification
74LVT245
3.3V Octal transceiver with direction pin (3-State)
2
1998 Feb 19
853-1727 18985
FEATURES
Octal bidirectional bus interface
3-State buffers
Output capability: +64mA/-32mA
TTL input and output switching levels
Input and output interface capability to systems at 5V supply
Bus-hold data inputs eliminate the need for external pull-up
resistors to hold unused inputs
Live insertion/extraction permitted
Power-up 3-State
No bus current loading when output is tied to 5V bus
Latch-up protection exceeds 500mA per JEDEC Std 17
ESD protection exceeds 2000V per MIL STD 883 Method 3015
and 200V per Machine Model
DESCRIPTION
The LVT245 is a high-performance BiCMOS product designed for
V
CC
operation at 3.3V.
This device is an octal transceiver featuring non-inverting 3-State
bus compatible outputs in both send and receive directions. The
control function implementation minimizes external timing
requirements. The device features an Output Enable (OE) input for
easy cascading and a Direction (DIR) input for direction control.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
T
amb
= 25
C; GND = 0V
TYPICAL
UNIT
t
PLH
t
PHL
Propagation delay
An to Bn or Bn to An
C
L
= 50pF;
V
CC
= 3.3V
2.4
ns
C
IN
Input capacitance
DIR, OE
V
I
= 0V or 3.0V
4
pF
C
I/O
I/O pin capacitance
Outputs disabled; V
I/O
= 0V or 3.0V
10
pF
I
CCZ
Total supply current
Outputs disabled; V
CC
= 3.6V
0.13
mA
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
OUTSIDE NORTH AMERICA
NORTH AMERICA
DWG NUMBER
20-Pin Plastic SO
40
C to +85
C
74LVT245 D
74LVT245 D
SOT163-1
20-Pin Plastic SSOP
40
C to +85
C
74LVT245 DB
74LVT245 DB
SOT339-1
20-Pin Plastic TSSOP
40
C to +85
C
74LVT245 PW
74LVT245PW DH
SOT360-1
PIN CONFIGURATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
DIR
A0
A1
A2
A3
A4
A5
A6
A7
GND
VCC
OE
B0
B1
B2
B3
B4
B5
B6
B7
SV00014
PIN DESCRIPTION
PIN NUMBER
SYMBOL
NAME AND FUNCTION
1
DIR
Direction control input
2, 3, 4, 5, 6, 7, 8, 9
A0 A7
Data inputs/outputs (A side)
18, 17, 16, 15, 14,
13, 12, 11
B0 B7
Data inputs/outputs (B side)
19
OE
Output enable input
(activeLow)
10
GND
Ground (0V)
20
V
CC
Positive supply voltage
Philips Semiconductors
Product specification
74LVT245
3.3V Octal transceiver with direction pin (3-State)
1998 Feb 19
3
LOGIC SYMBOL
A0
A1
A2
A3
A4
A5
A6
A7
B0
B1
B2
B3
B4
B5
B6
B7
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
OE
19
DIR
1
SV00016
FUNCTION TABLE
INPUTS
INPUTS/OUTPUTS
OEn
DIR
An
Bn
L
L
An= Bn
Inputs
L
H
Inputs
Bn =An
H
X
Z
Z
H = High voltage level
L = Low voltage level
X = Don't care
Z = High impedance "Off" state
LOGIC SYMBOL (IEEE/IEC)
2
3
4
5
6
7
8
9
G3
3 EN1 (BA)
3 EN2 (AB)
1
2
18
17
16
15
14
13
12
11
19
1
SV00015
ABSOLUTE MAXIMUM RATINGS
1,2
SYMBOL
PARAMETER
CONDITIONS
RATING
UNIT
V
CC
DC supply voltage
0.5 to +4.6
V
I
IK
DC input diode current
V
I
< 0
50
mA
V
I
DC input voltage
3
0.5 to +7.0
V
I
OK
DC output diode current
V
O
< 0
50
mA
V
OUT
DC output voltage
3
Output in Off or High state
0.5 to +7.0
V
I
O
DC output current
Output in Low state
128
mA
I
OUT
DC output current
Output in High state
64
mA
T
stg
Storage temperature range
65 to +150
C
NOTES:
1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the
device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to
absolute-maximum-rated conditions for extended periods may affect device reliability.
2. The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction
temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150
C.
3. The input and output negative voltage ratings may be exceeded if the input and output clamp current ratings are observed.
Philips Semiconductors
Product specification
74LVT245
3.3V Octal transceiver with direction pin (3-State)
1998 Feb 19
4
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
LIMITS
UNIT
SYMBOL
PARAMETER
MIN
MAX
UNIT
V
CC
DC supply voltage
2.7
3.6
V
V
I
Input voltage
0
5.5
V
V
IH
High-level input voltage
2.0
V
V
IL
Input voltage
0.8
V
I
OH
High-level output current
32
mA
I
OL
Low-level output current
32
mA
I
OL
Low-level output current; current duty cycle
50%; f
1kHz
64
mA
t/
v
Input transition rise or fall rate; Outputs enabled
10
ns/V
T
amb
Operating free-air temperature range
40
+85
C
DC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL
PARAMETER
TEST CONDITIONS
Temp = -40
C to +85
C
UNIT
MIN
TYP
1
MAX
V
IK
Input clamp voltage
V
CC
= 2.7V; I
IK
= 18mA
0.9
1.2
V
V
CC
= 2.7 to 3.6V; I
OH
= 100
A
V
CC
-0.2
V
CC
-0.1
V
OH
High-level output voltage
V
CC
= 2.7V; I
OH
= 8mA
2.4
2.5
V
V
CC
= 3.0V; I
OH
= 32mA
2.0
2.2
V
CC
= 2.7V; I
OL
= 100
A
0.1
0.2
V
CC
= 2.7V; I
OL
= 24mA
0.3
0.5
V
OL
Low-level output voltage
V
CC
= 3.0V; I
OL
= 16mA
0.25
0.4
V
V
CC
= 3.0V; I
OL
= 32mA
0.3
0.5
V
CC
= 3.0V; I
OL
= 64mA
0.4
0.55
V
CC
= 0 or 3.6V; V
I
= 5.5V
Control pins
1
10
V
CC
= 3.6V; V
I
= V
CC
or GND
Control ins
0.1
1
I
I
Input leakage current
V
CC
= 3.6V; V
I
= 5.5V
1
20
A
V
CC
= 3.6V; V
I
= V
CC
I/O Data pins
4
0.1
1
V
CC
= 3.6V; V
I
= 0
1
-5
I
OFF
Output off current
V
CC
= 0V; V
I
or V
O
= 0 to 4.5V
1
100
A
5
V
CC
= 3V; V
I
= 0.8V
75
150
I
HOLD
Bus Hold current A inputs
5
V
CC
= 3V; V
I
= 2.0V
75
150
A
V
CC
= 0V to 3.6V; V
CC
= 3.6V
500
I
EX
Current into an ouptut in the
High state when V
O
> V
CC
V
O
= 5.5V; V
CC
= 3.0V
60
125
A
I
PU/PD
Power up/down 3-State
output current
3
V
CC
1.2V; V
O
= 0.5V to V
CC
; V
I
= GND or V
CC
;
OE/OE = Don't care
15
100
A
I
CCH
V
CC
= 3.6V; Outputs High, V
I
= GND or V
CC,
I
O =
0
0.13
0.19
I
CCL
Quiescent supply current
V
CC
= 3.6V; Outputs Low, V
I
= GND or V
CC,
I
O =
0
3
12
mA
I
CCZ
V
CC
= 3.6V; Outputs Disabled; V
I
= GND or V
CC,
I
O =
0
0.13
0.19
I
CC
Additional supply current per
input pin
2
V
CC
= 3V to 3.6V; One input at V
CC
-0.6V,
Other inputs at V
CC
or GND
0.1
0.2
mA
NOTES:
1. All typical values are at V
CC
= 3.3V and T
amb
= 25
C.
2. This is the increase in supply current for each input at the specified voltage level other than V
CC
or GND
3. This parameter is valid for any V
CC
between 0V and 1.2V with a transition time of up to 10msec. From V
CC
= 1.2V to V
CC
= 3.3V
0.3V a
transition time of 100
sec is permitted. This parameter is valid for T
amb
= +25
C only.
4. Unused pins at V
CC
or GND.
5. This is the bus hold overdrive current required to force the input to the opposite logic state.
Philips Semiconductors
Product specification
74LVT245
3.3V Octal transceiver with direction pin (3-State)
1998 Feb 19
5
AC CHARACTERISTICS
GND = 0V; t
R
= t
F
= 2.5ns; C
L
= 50pF; R
L
= 500
; T
amb
= 40
C to +85
C.
LIMITS
SYMBOL
PARAMETER
WAVEFORM
V
CC
= 3.3V +0.3V
V
CC
= 2.7V
UNIT
MIN
TYP
1
MAX
MAX
t
PLH
t
PHL
Propagation delay
An to Bn or Bn to An
1
1.0
1.0
2.4
2.4
4.0
4.0
4.7
4.6
ns
t
PZH
t
PZL
Output enable time
to High and Low level
2
1.1
1.5
3.3
3.2
5.5
5.5
7.1
6.5
ns
t
PHZ
t
PLZ
Output disable time
from High and Low Level
2
2.2
2.0
3.6
3.4
5.9
4.8
6.5
4.8
ns
NOTES:
1. All typical values are at V
CC
= 3.3V and T
amb
= 25
C.
AC WAVEFORMS
V
M
= 1.5V, V
IN
= GND to 2.7V
An or Bn
INPUT
V
M
V
M
Bn or An
OUTPUT
V
M
V
M
t
PHL
t
PLH
SA00192
Waveform 1. Input (An or Bn) to Output (Bn or An) Propagation
Delays
OE INPUT
tPZH
tPHZ
Bn or An
OUTPUT
V
OH
An or Bn
OUTPUT
V
OL
tPZL
tPLZ
3.0V
0V
V
OL
+ 0.3V
V
OH
0.3V
2.7V
1.5V
1.5V
1.5V
1.5V
0V
SV00106
Waveform 2. 3-State Output Enable and Disable Times
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