TC74LCX16244
CMOS Digital Integrated Circuits
Silicon Monolithic
TC74LCX16244
1. Functional Description
•
Low-Voltage 16-Bit Bus Buffer with 5-V Tolerant Inputs and Outputs
2. General
The TC74LCX16244 is a high-performance CMOS 16-bit bus buffer. 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) VCC applications, but it could be used to interface to 5 V
supply environment for both inputs and outputs.
This device is non-inverting 3-state buffer having four active-low output enables. It can be used as four 4-bit
buffers two 8-bit buffers or one 16-bit buffer. When the OE input is high, the outputs are in a high-impedance
state. This device is designed to be used with 3-state memory address drivers, etc.
All inputs are equipped with protection circuits against static discharge.
3. Features (Note)
(1)
Wide operating temperature range: Topr = -40 to 125 � (Note 1)
(2)
Low-voltage operation: VCC = 2.0 to 3.6 V
(3)
High-speed operation: tpd = 4.5 ns (max) (VCC = 3.0 to 3.6 V)
(4)
Output current: |IOH|/IOL = 24 mA (min) (VCC = 3.0 V)
(5)
Package: TSSOP
(6)
Power-down protection provided on all inputs and outputs
Note 1: Operating Range spec of Topr = -40 � to 125 � is applicable only for the products which manufactured after
January 2020.
4. Packaging
TSSOP48
Start of commercial production
2020-01
©2021
Toshiba Electronic Devices & Storage Corporation
1
2021-05-10
Rev.1.0
TC74LCX16244
5. Pin Assignment
6. Marking
©2021
Toshiba Electronic Devices & Storage Corporation
2
2021-05-10
Rev.1.0
TC74LCX16244
7. IEC Logic Symbol
8. Truth Table
Inputs
1OE
2OE
3OE
4OE
X:
Z:
Inputs
1A1-1A4
2A1-2A4
3A1-3A4
4A1-4A4
Outputs
1Y1-1Y4
2Y1-2Y4
3Y1-3Y4
4Y1-4Y4
L
L
L
L
H
H
H
X
Z
Don't care
High impedance
9. System Diagram
©2021
Toshiba Electronic Devices & Storage Corporation
3
2021-05-10
Rev.1.0
TC74LCX16244
10. Absolute Maximum Ratings (Note)
Characteristics
Symbol
Note
Rating
Unit
Supply voltage
VCC
-0.5 to 6.0
V
Input voltage
VIN
-0.5 to 7.0
V
(Note 1)
-0.5 to 7.0
V
(Note 2)
-0.5 to VCC + 0.5
-50
mA
(Note 3)
±50
mA
±50
mA
(Note 4)
400
mW
ICC/IGND
±100
mA
Tstg
-65 to 150
�
Output voltage
VOUT
Input diode current
IIK
Output diode current
IOK
Output current
IOUT
Power dissipation
VCC/ground current (per supply pin)
PD
Storage temperature
Note:
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 1: Output in OFF state.
Note 2: High (H) or Low (L) state. IOUT absolute maximum rating must be observed.
Note 3: VOUT < GND, VOUT > VCC
Note 4: 400 mW in the range of Ta = -40 to 85 �. From Ta = 85 to 125 � a derating factor of -6.25 mW/� shall be
applied until 150 mW.
11. Operating Ranges (Note)
Characteristics
Supply voltage
Symbol
Note
VCC
(Note 1)
Input voltage
VIN
Output voltage
VOUT
Output current
IOH,IOL
Rating
Unit
2.0 to 3.6
V
1.5 to 3.6
0 to 5.5
V
(Note 2)
0 to 5.5
V
(Note 3)
0 to VCC
(Note 4)
±24
(Note 5)
±12
(Note 6)
±8
mA
Operating temperature
Topr
(Note 7)
-40 to 125
�
Input rise and fall times
dt/dv
(Note 8)
0 to 10
ns/V
Note:
The operating ranges must be maintained 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 1: Data retention only.
Note 2: Output in OFF state.
Note 3: High (H) or Low (L) state.
Note 4: VCC = 3.0 to 3.6 V
Note 5: VCC = 2.7 to 3.0 V
Note 6: VCC = 2.3 to 2.7 V
Note 7: Operating Range spec of Topr = -40 � to 125 � is applicable only for the products which manufactured after
January 2020.
Note 8: VIN = 0.8 to 2.0 V , VCC = 3.0 V
©2021
Toshiba Electronic Devices & Storage Corporation
4
2021-05-10
Rev.1.0
TC74LCX16244
12. Electrical Characteristics
12.1. DC Characteristics (Unless otherwise specified, T a = -40 to 85�)
Characteristics
Symbol
Test Condition
VCC (V)
Min
Max
Unit
High-level input voltage
VIH
�
2.3 to 2.7
1.7
�
V
2.7 to 3.6
2.0
�
Low-level input voltage
VIL
�
2.3 to 2.7
�
0.7
2.7 to 3.6
�
0.8
High-level output voltage
VOH
VIN = VIH or VIL
2.3 to 3.6
VCC - 0.2
�
IOH = -8 mA
2.3
1.8
�
IOH = -12 mA
2.7
2.2
�
IOH = -18 mA
3.0
2.4
�
IOH = -24 mA
3.0
2.2
�
IOL = 100 µA
Low-level output voltage
VOL
IOH = -100 µA
VIN = VIH or VIL
2.3 to 3.6
�
0.2
IOL = 8 mA
2.3
�
0.6
IOL = 12 mA
2.7
�
0.4
IOL = 16 mA
3.0
�
0.4
IOL = 24 mA
V
V
V
3.0
�
0.55
Input leakage current
IIN
VIN = 0 to 5.5 V
2.3 to 3.6
�
±5.0
µA
3-state output OFF-state
leakage current
IOZ
VIN = VIH or VIL
VOUT = 0 to 5.5 V
2.3 to 3.6
�
±5.0
µA
Power-OFF leakage current
IOFF
VIN/VOUT = 5.5 V
0
�
10.0
µA
Quiescent supply current
ICC
VIN = VCC or GND
2.3 to 3.6
�
20.0
µA
VIN/VOUT = 3.6 to 5.5 V
2.3 to 3.6
�
±20.0
VIH = VCC - 0.6 V
(per input)
2.3 to 3.6
�
500
∆ICC
©2021
Toshiba Electronic Devices & Storage Corporation
5
µA
2021-05-10
Rev.1.0
TC74LCX16244
12.2. DC Characteristics (Note) (Unless otherwise specified, T a = -40 to 125 �)
Characteristics
Symbol
High-level input voltage
Test Condition
VIH
Low-level input voltage
�
VIL
High-level output voltage
VOH
Low-level output voltage
VOL
�
VIN = VIH or VIL
IOH = -100 µA
VIN = VIH or VIL
VCC (V)
Min
Max
Unit
2.3 to 2.7
1.7
�
V
2.7 to 3.6
2.0
�
2.3 to 2.7
�
0.7
2.7 to 3.6
�
0.8
2.3 to 3.6
VCC - 0.2
�
IOH = -8 mA
2.3
1.55
�
IOH = -12 mA
2.7
2.0
�
IOH = -18 mA
3.0
2.2
�
IOH = -24 mA
3.0
1.9
�
IOL = 100 µA
2.3 to 3.6
�
0.2
IOL = 8 mA
2.3
�
0.9
IOL = 12 mA
2.7
�
0.6
IOL = 16 mA
3.0
�
0.6
IOL = 24 mA
3.0
�
0.8
V
V
V
Input leakage current
IIN
VIN = 0 to 5.5 V
2.3 to 3.6
�
±20.0
µA
3-state output OFF-state
leakage current
IOZ
VIN = VIH or VIL
VOUT = 0 to 5.5 V
2.3 to 3.6
�
±20.0
µA
Power-OFF leakage current
IOFF
VIN/VOUT = 5.5 V
0
�
40.0
µA
Quiescent supply current
ICC
VIN = VCC or GND
2.3 to 3.6
�
80.0
µA
VIN/VOUT = 3.6 to 5.5 V
2.3 to 3.6
�
±80.0
VIH = VCC - 0.6 V
(per input)
2.3 to 3.6
�
5000
∆ICC
Note:
µA
Operating Range spec of Topr = -40 � to 125 � is applicable only for the products which manufactured after
January 2020.
12.3. AC Characteristics (Unless otherwise specified, T a = -40 to 85�)
Characteristics
Propagation delay time
3-state output enable time
3-state output disable
time
Output skew
Symbol
Note
tPLH,tPHL
tPZL,tPZH
tPLZ,tPHZ
Test Condition
VCC (V)
CL (pF)
Min
Max
Unit
See 12.7 AC Test Circuit,
Table 12.7.1, Fig. 12.8.1,
Table 12.8.1
2.5 ± 0.2
30
1.5
5.4
ns
2.7
50
1.5
5.2
3.3 ± 0.3
50
1.5
4.5
See 12.7 AC Test Circuit,
Table 12.7.1, Fig. 12.8.2,
Table 12.8.1
2.5 ± 0.2
30
1.5
7.2
2.7
50
1.5
6.3
3.3 ± 0.3
50
1.5
5.5
See 12.7 AC Test Circuit,
Table 12.7.1, Fig. 12.8.2,
Table 12.8.1
2.5 ± 0.2
30
1.5
6.5
tosLH,tosHL (Note 1)
�
2.7
50
1.5
5.7
3.3 ± 0.3
50
1.5
5.4
2.5 ± 0.2
30
�
�
2.7
50
�
�
3.3 ± 0.3
50
�
1.0
ns
ns
ns
Note 1: Parameter guaranteed by design. (tosLH = |tPLHm-tPLHn|, tosHL = |tPHLm-tPHLn|)
©2021
Toshiba Electronic Devices & Storage Corporation
6
2021-05-10
Rev.1.0
TC74LCX16244
12.4. AC Characteristics (Note) (Unless otherwise specified, T a = -40 to 125 �)
Characteristics
Propagation delay time
3-state output enable time
3-state output disable
time
Output skew
Symbol
Note
Test Condition
tPLH,tPHL
tPZL,tPZH
tPLZ,tPHZ
VCC (V)
CL (pF)
Min
Max
Unit
See 12.7 AC Test Circuit,
Table 12.7.1, Fig. 12.8.1,
Table 12.8.1
2.5 ± 0.2
30
1.5
5.9
ns
2.7
50
1.5
5.7
3.3 ± 0.3
50
1.5
4.9
See 12.7 AC Test Circuit,
Table 12.7.1, Fig. 12.8.2,
Table 12.8.1
2.5 ± 0.2
30
1.5
8.0
2.7
50
1.5
7.0
3.3 ± 0.3
50
1.5
6.1
See 12.7 AC Test Circuit,
Table 12.7.1, Fig. 12.8.2,
Table 12.8.1
2.5 ± 0.2
30
1.5
7.2
2.7
50
1.5
6.3
3.3 ± 0.3
50
1.5
6.0
2.5 ± 0.2
30
�
�
2.7
50
�
�
3.3 ± 0.3
50
�
1.0
tosLH,tosHL (Note 1)
�
ns
ns
ns
Note:
Operating Range spec of Topr = -40 � to 125 � is applicable only for the products which manufactured after
January 2020.
Note 1: Parameter guaranteed by design. (tosLH = |tPLHm-tPLHn|, tosHL = |tPHLm-tPHLn|)
12.5. Dynamic Switching Characteristics
(Unless otherwise specified, T a = 25�, Input: t r = t f = 2.5 ns, R L = 500 Ω)
Characteristics
Symbol
Quiet output maximum dynamic VOL
VOLP
Quiet output minimum dynamic VOL
|VOLV|
Test Condition
VCC (V)
Typ.
Unit
VIH = 2.5 V, VIL = 0 V, CL = 30 pF
2.5
0.6
V
VIH = 3.3 V, VIL = 0 V, CL = 50 pF
3.3
0.8
VIH = 2.5 V, VIL = 0 V, CL = 30 pF
2.5
0.6
VIH = 3.3 V, VIL = 0 V, CL = 50 pF
3.3
0.8
V
12.6. Capacitive Characteristics (Unless otherwise specified, T a = 25�)
Characteristics
Input capacitance
Symbol
Note
Test Condition
VCC (V)
Typ.
Unit
�
3.3
7
pF
�
3.3
8
pF
3.3
25
pF
CIN
Bus I/O capacitance
CI/O
Power dissipation capacitance
CPD
(Note 1) fIN = 10 MHz
Note 1: CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current
consumption without load. Average operating current can be obtained by the equation.
ICC(opr) = CPD × VCC × fIN + ICC/16 (per bit)
©2021
Toshiba Electronic Devices & Storage Corporation
7
2021-05-10
Rev.1.0
TC74LCX16244
12.7. AC Test Circuit
Table 12.7.1
Parameter for AC Test Circuit
Parameter
Switch
Test Condition
tPLH, tPHL
OPEN
�
tPLZ, tPZL
tPHZ, tPZH
©2021
Toshiba Electronic Devices & Storage Corporation
6.0 V
VCC = 3.3 ± 0.3 V
VCC × 2
VCC = 2.5 ± 0.2 V
GND
8
�
2021-05-10
Rev.1.0
TC74LCX16244
12.8. AC Waveform
Fig. 12.8.1
Fig. 12.8.2
Table 12.8.1
t PLH , t PHL
t PLZ , t PHZ , t PZL , t PZH
AC Waveform Symbols
Symbol
VCC = 3.3 ± 0.3 V
VCC = 2.7 V
VCC = 2.5 ± 0.2 V
VIH
2.7 V
2.7 V
VCC
VM
1.5 V
1.5 V
VCC/2
VX
VOL + 0.3 V
VOL + 0.3 V
VOL + 0.15 V
VY
VOH - 0.3 V
VOH - 0.3 V
VOH - 0.15 V
CL
50 pF
30 pF
30 pF
RL
500 Ω
500 Ω
500 Ω
©2021
Toshiba Electronic Devices & Storage Corporation
9
2021-05-10
Rev.1.0
TC74LCX16244
Package Dimensions
Unit: mm
Weight: 0.25 g (typ.)
Package Name(s)
Nickname: TSSOP48
©2021
Toshiba Electronic Devices & Storage Corporation
10
2021-05-10
Rev.1.0
TC74LCX16244
RESTRICTIONS ON PRODUCT USE
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Hardware, software and systems described in this document are collectively referred to as "Product".
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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.
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2021-05-10
Rev.1.0
