TC74LCX16245FT
TOSHIBA CMOS Digital Integrated Circuit
Silicon Monolithic
TC74LCX16245FT
Low-Voltage 16-Bit Bus Transceiver with 5-V Tolerant Inputs and Outputs
The TC74LCX16245FT is a high-performance CMOS 16-bit bus
transceiver. Designed for use in 2.5-V or 3.3-V systems, it
achieves high-speed operation while maintaining the CMOS low
power dissipation.
The device is designed for low-voltage (2.5-V or 3.3-V) V
CC
applications, but it could be used to interface to 5-V supply
environment for both inputs and outputs.
This 16-bit bus transceiver is controlled by direction control
(DIR) inputs and output enable (
OE
) inputs which are common
to each byte. It can be used as two 8-bit transceiver or one 16-bit
Weight: 0.25 g (typ.)
transceiver. The direction of data transmission is determined by
the level of the DIR inputs. The
OE
inputs can be used to
disable the device so that the busses are effectively isolated.
All inputs are equipped with protection circuits against static discharge.
Features (Note)
•
•
•
•
•
•
•
Low-voltage operation: V
CC
= 2.0 to 3.6 V
High-speed operation: t
pd
= 4.5 ns (max) (V
CC
= 3.0 to 3.6 V)
Ouput current: |I
OH
|/I
OL
= 24 mA (min) (V
CC
= 3.0 V)
Latch-up performance:
−500
mA
Package: TSSOP
Bidirectional interface between 5.0 V and low-voltage (2.5-V or 3.3-V) signals
Power-down protection provided on all inputs and outputs
Note: Do not apply a signal to any bus pins when it is in the output mode. Damage may result.
All floating (high impedance) bus pins must have their input level fixed by means of pull-up or pull-down
resistors.
Start of commercial production
2002-03
1
2014-03-01
TC74LCX16245FT
Pin Assignment
(top view)
1OE
IEC Logic Symbol
48
1
25
24
G3
3 EN1 (BA)
3 EN2 (AB)
G6
6 EN4 (BA)
6 EN5 (AB)
1A1
1A2
1A3
1A4
1A5
1A6
1A7
1A8
2A1
2A2
47
46
44
43
41
40
38
37
36
35
33
32
30
29
27
26
4
5
1
2
2
3
5
6
8
9
11
12
13
14
16
17
19
20
22
23
1B1
1B2
1B3
1B4
1B5
1B6
1B7
1B8
2B1
2B2
2B3
2B4
2B5
2B6
2B7
2B8
1DIR
1B1
1B2
GND
1B3
1B4
V
CC
1B5
1B6
1
2
3
4
5
6
7
8
9
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
1OE
1A1
1A2
GND
1A3
1A4
V
CC
1A5
1A6
GND
1A7
1A8
2A1
2A2
GND
2A3
2A4
V
CC
2A5
2A6
GND
2A7
2A8
2OE
1DIR
2OE
2DIR
GND 10
1B7 11
1B8 12
2B1 13
2B2 14
GND 15
2B3 16
2B4 17
V
CC
18
2B5 19
2B6 20
GND 21
2B7 22
2B8 23
2DIR 24
2A3
2A4
2A5
2A6
2A7
2A8
2
2014-03-01
TC74LCX16245FT
Truth Table
Inputs
Function
1DIR
L
H
X
Bus
1A1-1A8
Output
Input
Z
Bus
1B1-1B8
Input
Output
Outputs
A
=
B
B
=
A
Z
1OE
L
L
H
Inputs
2OE
L
L
H
2DIR
L
H
X
Function
Bus
2A1-2A8
Output
Input
Z
Bus
2B1-2B8
Input
Output
Outputs
A
=
B
B
=
A
Z
X: Don’t care
Z: High impedance
System Diagram
1DIR
1OE
2OE
2DIR
1A1
1B1
2B1
2A1
1/8
3
2014-03-01
TC74LCX16245FT
Absolute Maximum Ratings (Note 1)
Characteristics
Power supply voltage
DC input voltage
(DIR,
OE
)
DC bus I/O voltage
Input diode current
Output diode current
DC output current
Power dissipation
DC V
CC
/ground current per supply pin
Storage temperature
Symbol
V
CC
V
IN
Rating
−0.5
to 6.0
−0.5
to 7.0
−0.5
to 7.0
V
I/O
I
IK
I
OK
I
OUT
P
D
I
CC
/I
GND
T
stg
(Note 2)
V
mA
(Note 4)
mA
mA
mW
mA
°C
Unit
V
V
−0.5
to V
CC
+
0.5
(Note 3)
−50
±50
±50
400
±100
−65
to 150
Note 1: Exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in IC performance or
even destruction.
Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the
significant change in temperature, etc.) may cause this product to decrease in the reliability significantly
even if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute
maximum ratings and the operating ranges.
Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook
(“Handling Precautions”/“Derating Concept and Methods”) and individual reliability data (i.e. reliability test
report and estimated failure rate, etc).
Note 2: Output in OFF state
Note 3: High or low state. I
OUT
absolute maximum rating must be observed.
Note 4: V
OUT
<
GND, V
OUT
>
V
CC
Operating Ranges
(Note 1)
Characteristics
Power supply voltage
Input voltage
(DIR, OE )
Bus I/O voltage
Symbol
V
CC
V
IN
V
I/O
Rating
2.0 to 3.6
1.5 to 3.6 (Note 2)
0 to 5.5
0 to 5.5 (Note 3)
0 to V
CC
(Note 4)
±24
Output current
Operating temperature
Input rise and fall time
I
OH
/I
OL
T
opr
dt/dv
±12
±8
−40
to 85
0 to 10
(Note 8)
(Note 5)
(Note 6)
(Note 7)
°C
ns/V
mA
Unit
V
V
V
Note 1: The operating ranges must be maintained to ensure the normal operation of the device. Unused inputs must
be tied to either V
CC
or GND. Please connect both bus inputs and the bus outputs with V
CC
or GND when
the I/O of the bus terminal changes by the function. In this case, please note that the output is not
short-circuited.
Note 2: Data retention only
Note 3: Output in OFF state
Note 4: High or low state
Note 5: V
CC
=
3.0 to 3.6 V
Note 6: V
CC
=
2.7 to 3.0 V
Note 7: V
CC
=
2.3 to 2.7 V
Note 8: V
IN
=
0.8 to 2.0 V, V
CC
=
3.0 V
4
2014-03-01
TC74LCX16245FT
Electrical Characteristics
DC Characteristics
(Ta
= −40
to 85°C)
Characteristics
Symbol
Test Condition
V
CC
(V)
2.3 to 2.7
2.7 to 3.6
2.3 to 2.7
2.7 to 3.6
I
OH
= −100 μA
I
OH
= −8
mA
I
OH
= −12
mA
I
OH
= −18
mA
Output voltage
I
OH
= −24
mA
I
OL
=
100
μA
I
OL
=
8 mA
L-level
V
OL
V
IN
=
V
IH
or V
IL
I
OL
=
12 mA
I
OL
=
16 mA
I
OL
=
24 mA
Input leakage current
3-state output OFF state current
Power-off leakage current
Quiescent supply current
Increase in I
CC
per input
I
IN
I
OZ
I
OFF
I
CC
ΔI
CC
V
IN
=
0 to 5.5 V
V
IN
=
V
IH
or V
IL
V
OUT
=
0 to 5.5 V
V
IN
/V
OUT
=
5.5 V
V
IN
=
V
CC
or GND
V
IN
/V
OUT
=
3.6 to 5.5 V
V
IH
=
V
CC
−
0.6 V
2.3 to 3.6
2.3
2.7
3.0
3.0
2.3 to 3.6
2.3
2.7
3.0
3.0
2.3 to 3.6
2.3 to 3.6
0
2.3 to 3.6
2.3 to 3.6
2.3 to 3.6
Min
1.7
2.0
⎯
⎯
V
CC
−
0.2
1.8
2.2
2.4
2.2
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
0.2
0.6
0.4
0.4
0.55
±5.0
±5.0
10.0
20.0
±20.0
500
μA
μA
μA
μA
V
Max
⎯
⎯
0.7
0.8
⎯
⎯
V
Unit
H-level
Input voltage
L-level
V
IH
⎯
V
IL
⎯
H-level
V
OH
V
IN
=
V
IH
or V
IL
5
2014-03-01
京公网安备 11010802033920号
EEWORLD
