INTEGRATED CIRCUITS
74LVT245
3.3V Octal transceiver with direction pin
(3-State)
Product specification
Supersedes data of 1994 May 20
IC23 Data Handbook
1998 Feb 19
Philips
Semiconductors
Philips Semiconductors
Product specification
3.3V Octal transceiver with direction pin (3-State)
74LVT245
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
•
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
resistors to hold unused inputs
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
t
PLH
t
PHL
C
IN
C
I/O
I
CCZ
PARAMETER
Propagation delay
An to Bn or Bn to An
Input capacitance
DIR, OE
I/O pin capacitance
Total supply current
CONDITIONS
T
amb
= 25°C; GND = 0V
C
L
= 50pF;
V
CC
= 3.3V
V
I
= 0V or 3.0V
Outputs disabled; V
I/O
= 0V or 3.0V
Outputs disabled; V
CC
= 3.6V
TYPICAL
2.4
4
10
0.13
UNIT
ns
pF
pF
mA
ORDERING INFORMATION
PACKAGES
20-Pin Plastic SO
20-Pin Plastic SSOP
20-Pin Plastic TSSOP
TEMPERATURE RANGE
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
OUTSIDE NORTH AMERICA
74LVT245 D
74LVT245 DB
74LVT245 PW
NORTH AMERICA
74LVT245 D
74LVT245 DB
74LVT245PW DH
DWG NUMBER
SOT163-1
SOT339-1
SOT360-1
PIN CONFIGURATION
DIR
A0
A1
A2
A3
A4
A5
A6
A7
1
2
3
4
5
6
7
8
9
20
19
18
17
16
15
14
13
12
11
V
CC
OE
B0
B1
B2
B3
B4
B5
B6
B7
PIN DESCRIPTION
PIN NUMBER
1
2, 3, 4, 5, 6, 7, 8, 9
18, 17, 16, 15, 14,
13, 12, 11
19
10
20
SYMBOL
DIR
A0 – A7
B0 – B7
OE
GND
V
CC
NAME AND FUNCTION
Direction control input
Data inputs/outputs (A side)
Data inputs/outputs (B side)
Output enable input
(active–Low)
Ground (0V)
Positive supply voltage
GND 10
SV00014
1998 Feb 19
2
853-1727 18985
Philips Semiconductors
Product specification
3.3V Octal transceiver with direction pin (3-State)
74LVT245
LOGIC SYMBOL
1
DIR
19
2
18
A1
3
17
A2
4
16
A3
5
15
A4
6
14
A5
7
13
A6
8
12
A7
9
B7
SV00016
11
B6
B5
B4
B2
B1
B0
OE
LOGIC SYMBOL (IEEE/IEC)
19
G3
3 EN1 (BA)
1
3 EN2 (AB)
18
1
2
3
B3
4
5
6
7
8
9
16
15
14
13
12
11
17
A0
2
SV00015
FUNCTION TABLE
INPUTS
OEn
L
L
H
L
X
Z
=
=
=
=
DIR
L
H
INPUTS/OUTPUTS
An
An= Bn
Inputs
Z
Bn
Inputs
Bn =An
Z
H
X
High voltage level
Low voltage level
Don’t care
High impedance “Off” state
ABSOLUTE MAXIMUM RATINGS
1,2
SYMBOL
V
CC
I
IK
V
I
I
OK
V
OUT
I
O
OUT
T
stg
PARAMETER
DC supply voltage
DC input diode current
DC input voltage
3
DC output diode current
DC output voltage
3
DC output current
Output in High state
Storage temperature range
–64
–65 to +150
°C
V
O
< 0
Output in Off or High state
Output in Low state
V
I
< 0
CONDITIONS
RATING
–0.5 to +4.6
–50
–0.5 to +7.0
–50
–0.5 to +7.0
128
mA
UNIT
V
mA
V
mA
V
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.
1998 Feb 19
3
Philips Semiconductors
Product specification
3.3V Octal transceiver with direction pin (3-State)
74LVT245
RECOMMENDED OPERATING CONDITIONS
SYMBOL
V
CC
V
I
V
IH
V
IL
I
OH
I
OL
∆t/∆v
T
amb
DC supply voltage
Input voltage
High-level input voltage
Input voltage
High-level output current
Low-level output current
Low-level output current; current duty cycle
≤
50%; f
≥
1kHz
Input transition rise or fall rate; Outputs enabled
Operating free-air temperature range
–40
PARAMETER
LIMITS
MIN
2.7
0
2.0
0.8
–32
32
64
10
+85
MAX
3.6
5.5
UNIT
V
V
V
V
mA
mA
ns/V
°C
DC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL
V
IK
V
OH
PARAMETER
Input clamp voltage
High-level output voltage
TEST CONDITIONS
V
CC
= 2.7V; I
IK
= –18mA
V
CC
= 2.7 to 3.6V; I
OH
= –100µA
V
CC
= 2.7V; I
OH
= –8mA
V
CC
= 3.0V; I
OH
= –32mA
V
CC
= 2.7V; I
OL
= 100µA
V
CC
= 2.7V; I
OL
= 24mA
V
OL
Low-level output voltage
V
CC
= 3.0V; I
OL
= 16mA
V
CC
= 3.0V; I
OL
= 32mA
V
CC
= 3.0V; I
OL
= 64mA
V
CC
= 0 or 3.6V; V
I
= 5.5V
V
CC
= 3.6V; V
I
= V
CC
or GND
I
I
Input leakage current
V
CC
= 3.6V; V
I
= 5.5V
V
CC
= 3.6V; V
I
= V
CC
V
CC
= 3.6V; V
I
= 0
I
OFF
I
HOLD
Output off current
Bus Hold current A inputs
5
Current into an ouptut in the
High state when V
O
> V
CC
Power up/down 3-State
output current
3
Quiescent supply current
Additional supply current per
input pin
2
V
CC
= 0V; V
I
or V
O
= 0 to 4.5V
V
CC
= 3V; V
I
= 0.8V
V
CC
= 3V; V
I
= 2.0V
V
CC
= 0V to 3.6V; V
CC
= 3.6V
I
EX
I
PU/PD
I
CCH
I
CCL
I
CCZ
∆I
CC
V
O
= 5.5V; V
CC
= 3.0V
V
CC
≤
1.2V; V
O
= 0.5V to V
CC
; V
I
= GND or V
CC
;
OE/OE = Don’t care
V
CC
= 3.6V; Outputs High, V
I
= GND or V
CC,
I
O =
0
V
CC
= 3.6V; Outputs Low, V
I
= GND or V
CC,
I
O =
0
V
CC
= 3.6V; Outputs Disabled; V
I
= GND or V
CC,
I
O =
0
V
CC
= 3V to 3.6V; One input at V
CC
-0.6V,
Other inputs at V
CC
or GND
75
–75
±500
60
15
0.13
3
0.13
0.1
125
±100
0.19
12
0.19
0.2
mA
mA
µA
µA
I/O Data pins
4
Control pins
ins
V
CC
-0.2
2.4
2.0
Temp = -40°C to +85°C
MIN
TYP
1
–0.9
V
CC
-0.1
2.5
2.2
0.1
0.3
0.25
0.3
0.4
1
±0.1
1
0.1
–1
1
150
–150
µA
0.2
0.5
0.4
0.5
0.55
10
±1
20
1
-5
±100
µA
µA
V
V
MAX
–1.2
V
UNIT
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 100µsec 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.
1998 Feb 19
4
Philips Semiconductors
Product specification
3.3V Octal transceiver with direction pin (3-State)
74LVT245
AC CHARACTERISTICS
GND = 0V; t
R
= t
F
= 2.5ns; C
L
= 50pF; R
L
= 500Ω; T
amb
= –40°C to +85°C.
LIMITS
SYMBOL
PARAMETER
WAVEFORM
MIN
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Propagation delay
An to Bn or Bn to An
Output enable time
to High and Low level
Output disable time
from High and Low Level
1
2
2
1.0
1.0
1.1
1.5
2.2
2.0
V
CC
= 3.3V +0.3V
TYP
1
2.4
2.4
3.3
3.2
3.6
3.4
MAX
4.0
4.0
5.5
5.5
5.9
4.8
V
CC
= 2.7V
MAX
4.7
4.6
7.1
6.5
6.5
4.8
ns
ns
ns
UNIT
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
2.7V
OE INPUT
An or Bn
INPUT
V
M
V
M
t
PZL
t
PHL
t
PLH
An or Bn
OUTPUT
Bn or An
OUTPUT
V
M
V
M
t
PZH
t
PLZ
1.5V
1.5V
0V
3.0V
1.5V
V
OL
+ 0.3V
t
PHZ
V
OL
V
OH
Bn or An
OUTPUT
1.5V
V
OH
– 0.3V
SA00192
0V
Waveform 1. Input (An or Bn) to Output (Bn or An) Propagation
Delays
SV00106
Waveform 2. 3-State Output Enable and Disable Times
1998 Feb 19
5
