TOSHIBA TC74LCX245F_10

TC74LCX245F/FT/FK
TOSHIBA CMOS Digital Integrated Circuit
Silicon Monolithic
TC74LCX245F,TC74LCX245FT,TC74LCX245FK
Low-Voltage Octal Bus Transceiver with 5-V Tolerant Inputs and Outputs
The TC74LCX245 is a high-performance CMOS octal bus
transceiver. Designed for use in 3.3-V systems, it achieves
high-speed operation while maintaining the CMOS low power
dissipation.
The device is designed for low-voltage (3.3 V) VCC applications,
but it could be used to interface to 5-V supply environment for
both inputs and outputs.
The direction of data transmission is determined by the level of
the DIR input. The enable input ( OE ) can be used to disable the
device so that the busses are effectively isolated.
All inputs are equipped with protection circuits against static
discharge.
TC74LCX245F
TC74LCX245FT
Features (Note)
•
Low-voltage operation: VCC = 1.65 to 3.6 V
•
High-speed operation: tpd = 7.0 ns (max) (VCC = 3.0 to 3.6 V)
•
Ouput current: |IOH|/IOL = 24 mA (min) (VCC = 3.0 V)
•
Latch-up performance: >±500 mA
•
Available in JEITA SOP, TSSOP and VSSOP (US)
•
Bidirectional interface between 5.0 V and 3.3 V signals
•
Power-down protection provided on all inputs and outputs
•
Pin and function compatible with the 74 series
TC74LCX245FK
(74AC/VHC/HC/F/ALS/LS etc.) 245 type
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 levels fixed by means of pull-up or pull-down
resistors.
Weight
SOP20-P-300-1.27A
TSSOP20-P-0044-0.65A
VSSOP20-P-0030-0.50
: 0.22g (typ.)
: 0.08 g (typ.)
: 0.03 g (typ.)
Note: The Electrical Characteristics of VCC=1.8±0.15V is only applicable for products which manufactured
from January 2009 onward.
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TC74LCX245F/FT/FK
Pin Assignment (top view)
IEC Logic Symbol
OE
DIR
DIR
1
20
VCC
A1
2
19
OE
A2
3
18
B1
A3
4
17
B2
A4
5
16
B3
A2
A5
6
15
B4
A3
A6
7
14
B5
A7
8
13
B6
9
12
B7
GND 10
11
B8
G3
3EN1 (BA)
3EN2 (AB)
A1
2
18
1
B1
2
A4
A5
A8
19
1
A6
A7
A8
3
17
4
16
5
15
6
14
7
13
B6
8
12
B7
9
11
B8
B2
B3
B4
B5
Truth Table
Inputs
OE
DIR
L
L
L
H
Outputs
Function
A-Bus
B-Bus
A=B
Output
Input
H
B=A
Input
Output
X
Z
Z
X: Don’t care
Z: High impedance
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TC74LCX245F/FT/FK
Absolute Maximum Ratings (Note 1)
Characteristics
Power supply voltage
Symbol
Rating
Unit
VCC
−0.5 to 7.0
V
VIN
−0.5 to 7.0
V
DC input voltage
(DIR, OE )
−0.5 to 7.0 (Note 2)
DC bus I/O voltage
VI/O
−0.5 to VCC + 0.5
V
(Note 3)
Input diode current
IIK
−50
Output diode current
IOK
±50
DC output current
IOUT
±50
mA
Power dissipation
PD
180
mW
ICC/IGND
±100
mA
Tstg
−65 to 150
°C
DC VCC/ground current
Storage temperature
mA
(Note 4)
mA
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. IOUT absolute maximum rating must be observed.
Note 4: VOUT < GND, VOUT > VCC
Operating Ranges (Note 1)
Characteristics
Power supply voltage
Symbol
VCC
Input voltage
Rating
1.65 to 3.6
1.5 to 3.6 (Note 2)
0 to 5.5
VIN
(DIR, OE )
Bus I/O voltage
VI/O
Output current
IOH/IOL
Unit
V
0 to 5.5 (Note 3)
0 to VCC (Note 4)
±24
(Note 5)
±12
(Note 6)
Operating temperature
Topr
−40 to 85
Input rise and fall time
dt/dv
0 to 10
V
V
mA
°C
(Note 7)
ns/V
Note 1: The operating ranges are required to ensure the normal operation of the device. Unused inputs and bus
inputs must be tied to either VCC or GND. Please connect both bus inputs and the bus outputs with VCC 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: VCC = 3.0 to 3.6 V
Note 6: VCC = 2.7 to 3.0 V
Note 7: VIN = 0.8 to 2.0 V, VCC = 3.0 V
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TC74LCX245F/FT/FK
Electrical Characteristics
DC Characteristics (Ta = −40 to 85°C)
Characteristics
H-level
Symbol
Test Condition
Min
Max
1.65 to 2.3
VCC×0.9
⎯
2.3 to 2.7
1.7
⎯
2.7 to 3.6
2.0
⎯
1.65 to 2.3
⎯
VCC×0.1
2.3 to 2.7
⎯
0.7
2.7 to 3.6
⎯
0.8
1.65 to 3.6
VCC−0.2
⎯
IOH = −4 mA
1.65
1.05
⎯
IOH = −8 mA
2.3
1.7
⎯
IOH = −12 mA
2.7
2.2
⎯
IOH = −18 mA
3.0
2.4
⎯
IOH = −24 mA
3.0
2.2
⎯
IOL = 100 μA
1.65 to 3.6
⎯
0.2
IOL = 4 mA
1.65
⎯
0.45
IOL = 8 mA
2.3
⎯
0.7
IOL = 12 mA
2.7
⎯
0.4
IOL = 16 mA
3.0
⎯
0.4
IOL = 24 mA
3.0
⎯
0.55
1.65 to 3.6
⎯
±5.0
μA
1.65 to 3.6
⎯
±5.0
μA
VIN/VOUT = 5.5 V
0
⎯
10.0
μA
VIN = VCC or GND
1.65 to 3.6
⎯
10.0
VIN/VOUT = 3.6 to 5.5 V
1.65 to 3.6
⎯
±10.0
VIH = VCC − 0.6 V
2.7 to 3.6
⎯
500
⎯
VIH
Input voltage
L-level
⎯
VIL
IOH = −100 μA
H-level
VOH
VIN = VIH or VIL
Output voltage
L-level
VOL
Input leakage current
IIN
3-state output OFF state current
IOZ
Power-off leakage current
IOFF
Quiescent supply current
ICC
Increase in ICC per input
ΔICC
VIN = VIH or VIL
VIN = 0 to 5.5 V
VIN = VIH or VIL
VOUT = 0 to 5.5 V
4
VCC (V)
Unit
V
V
μA
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TC74LCX245F/FT/FK
AC Characteristics (Ta = −40 to 85°C)
Characteristics
Propagation delay time
Output enable time
Output disable time
Output to output skew
Note:
Symbol
tpLH
tpHL
tpZL
tpZH
tpLZ
tpHZ
Test Condition
Figure 1, Figure 2
Figure 1, Figure 3
Figure 1, Figure 3
tosLH
(Note)
tosHL
Min
Max
1.8 ± 0.15
⎯
25.0
2.5 ± 0.2
⎯
9.0
2.7
⎯
8.0
3.3 ± 0.3
1.5
7.0
1.8 ± 0.15
⎯
34.0
2.5 ± 0.2
⎯
17.0
2.7
⎯
9.5
3.3 ± 0.3
1.5
8.5
1.8 ± 0.15
⎯
32.0
2.5 ± 0.2
⎯
16.0
2.7
⎯
8.5
3.3 ± 0.3
1.5
7.5
2.7
⎯
⎯
3.3 ± 0.3
⎯
1.0
VCC (V)
Unit
ns
ns
ns
ns
Parameter guaranteed by design.
(tosLH = |tpLHm − tpLHn|, tosHL = |tpHLm − tpHLn|)
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TC74LCX245F/FT/FK
Dynamic Switching Characteristics (Ta = 25°C, input: tr = tf = 2.5 ns, CL = 50 pF, RL = 500 Ω)
Characteristics
Symbol
Test Condition
VCC (V)
Typ.
Unit
Quiet output maximum
dynamic VOL
VOLP
VIH = 3.3 V, VIL = 0 V
3.3
0.8
V
Quiet output minimum
dynamic VOL
|VOLV|
VIH = 3.3 V, VIL = 0 V
3.3
0.8
V
Typ.
Unit
Capacitive Characteristics (Ta = 25°C)
Characteristics
Symbol
Test Condition
VCC (V)
Input capacitance
CIN
DIR, OE
3.3
7
pF
Bus input capacitance
CI/O
An, Bn
3.3
8
pF
Power dissipation capacitance
CPD
fIN = 10 MHz
3.3
25
pF
Note:
(Note)
CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating
current consumption.
Average operating current can be obtained by the equation:
ICC (opr) = CPD・VCC・fIN + ICC/8 (per bit)
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TC74LCX245F/FT/FK
AC Test Circuit
RL
Switch
Parameter
Switch
tpLH, tpHL
Open
6.0 V
Measure
tpLZ, tpZL
RL
CL
Output
Open
6.0 V or VCC×2
GND
@VCC=3.3±0.3V
@VCC=2.7V
VCC×2
@VCC=2.5±0.2V
@VCC=1.8±0.15V
tpHZ, tpZH
GND
Figure 1
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TC74LCX245F/FT/FK
AC Waveform
tr
tf
90%
VIM
Input
(An, Bn)
VIH
10%
GND
VOH
Output
(Bn, An)
VOM
tpLH
VOL
tpHL
Figure 2 tpLH, tpHL
tr
tf
90%
VIM
Output Enable
( OE )
VIH
10%
tpLZ
GND
tpZL
VOH
Output (An, Bn)
Low to Off to Low
VOM
VX
tpHZ
VOH
VY
Output (An, Bn)
High to Off to High
VOL
tpZH
VOM
GND
Outputs
enabled
Outputs
enabled
Outputs
disabled
Figure 3 tpLZ, tpHZ, tpZL, tpZH
VCC
Symbol
3.3 ± 0.3 V
2.7V
Input
Output
Load
2.5 ± 0.2 V
1.8 ± 0.15 V
VIH
2.7V
VCC
VCC
VIM
1.5V
VCC/2
VCC/2
tr,tf
2.5ns
2.0ns
2.0ns
VOM
1.5V
VOH/2
VOH/2
VX
VOL +0.3V
VOL +0.15V
VOL +0.15V
VY
VOH -0.3V
VOL -0.15V
VOL -0.15V
CL
50pF
30pF
30pF
RL
500Ω
500Ω
1kΩ
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TC74LCX245F/FT/FK
Package Dimensions
Weight: 0.22 g (typ.)
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Package Dimensions
Weight: 0.08 g (typ.)
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Package Dimensions
Weight: 0.03 g (typ.)
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TC74LCX245F/FT/FK
RESTRICTIONS ON PRODUCT USE
• Toshiba Corporation, and its subsidiaries and affiliates (collectively “TOSHIBA”), reserve the right to make changes to the information
in this document, and related hardware, software and systems (collectively “Product”) without notice.
• This document and any information herein may not be reproduced without prior written permission from TOSHIBA. Even with
TOSHIBA’s written permission, reproduction is permissible only if reproduction is without alteration/omission.
• Though TOSHIBA works continually to improve Product’s quality and reliability, Product can malfunction or fail. Customers are
responsible for complying with safety standards and for providing adequate designs and safeguards for their hardware, software and
systems which minimize risk and avoid situations in which a malfunction or failure of Product could cause loss of human life, bodily
injury or damage to property, including data loss or corruption. Before customers use the Product, create designs including the
Product, or incorporate the Product into their own applications, customers must also refer to and comply with (a) the latest versions of
all relevant TOSHIBA information, including without limitation, this document, the specifications, the data sheets and application notes
for Product and the precautions and conditions set forth in the “TOSHIBA Semiconductor Reliability Handbook” and (b) the
instructions for the application with which the Product will be used with or for. Customers are solely responsible for all aspects of their
own product design or applications, including but not limited to (a) determining the appropriateness of the use of this Product in such
design or applications; (b) evaluating and determining the applicability of any information contained in this document, or in charts,
diagrams, programs, algorithms, sample application circuits, or any other referenced documents; and (c) validating all operating
parameters for such designs and applications. TOSHIBA ASSUMES NO LIABILITY FOR CUSTOMERS’ PRODUCT DESIGN OR
APPLICATIONS.
• Product is intended for use in general electronics applications (e.g., computers, personal equipment, office equipment, measuring
equipment, industrial robots and home electronics appliances) or for specific applications as expressly stated in this document.
Product is neither intended nor warranted for use in equipment or systems that require extraordinarily high levels of quality and/or
reliability and/or a malfunction or failure of which may cause loss of human life, bodily injury, serious property damage or serious
public impact (“Unintended Use”). Unintended Use includes, without limitation, equipment used in nuclear facilities, equipment used
in the aerospace industry, medical equipment, equipment used for automobiles, trains, ships and other transportation, traffic signaling
equipment, equipment used to control combustions or explosions, safety devices, elevators and escalators, devices related to electric
power, and equipment used in finance-related fields. Do not use Product for Unintended Use unless specifically permitted in this
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• ABSENT A WRITTEN SIGNED AGREEMENT, EXCEPT AS PROVIDED IN THE RELEVANT TERMS AND CONDITIONS OF SALE
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WHATSOEVER, INCLUDING WITHOUT LIMITATION, INDIRECT, CONSEQUENTIAL, SPECIAL, OR INCIDENTAL DAMAGES OR
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Please use Product in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances,
including without limitation, the EU RoHS Directive. TOSHIBA assumes no liability for damages or losses occurring as a result of
noncompliance with applicable laws and regulations.
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