TOSHIBA TC7MET138AFK

TC7MET138AFK
TOSHIBA CMOS Didital Integrated Circuit Silicon Monolithic
TC7MET138AFK
3-to-8 Line Decoder
The TC7MET138AFK is an advanced high speed CMOS 3-to-8
line decoder fabricated with silicon gate C2MOS technology. It
achieves the high speed operation similar to equivalent bipolar
schottky TTL while maintaining the CMOS low power
dissipation.
When the device is enabled, 3 binary select inputs (A, B and C)
determine which one of the outputs (Y0 - Y7) will go low.
When enable input G1 is held low or either G2A or G2B is held
high, decoding function is inhibited and all outputs go high. G1,
G2A, and G2B inputs are provided to ease cascade connection
and for use as an address decoder for memory systems.
The input voltage are compatible with TTL output voltage.
Weight: 0.02 g (typ.)
This device may be used as a level converter for interfacing 3.3
V to 5 V system.
Input protection and output circuit ensure that 0 to 5.5 V can be applied to the input and output (*) pins without
regard to the supply voltage. These structure prevents device destruction due to mismatched supply and
input/output voltages such as battery back up, hot board insertion, etc.
*: VCC = 0 V
Features
•
High speed: tpd = 7.6 ns (typ.) (VCC = 5 V)
•
Low power dissipation: ICC = 4 µA (max) (Ta = 25°C)
•
Compatible with TTL outputs: VIL = 0.8 V (max)
VIH = 2.0 V (min)
•
Power down protection is provided on all inputs and outputs.
•
Balanced propagation delays: tpLH ≈ tpHL
•
Pin and function compatible with the 74 series (74AC/HC/ALS/LS etc.) 138 type.
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TC7MET138AFK
Pin Assignment (top view)
A
1
16
VCC
B
2
15
Y0
C
3
14
Y1
G2A
4
13
Y2
G2B
5
12
Y3
G1
6
11
Y4
Y7
7
10
Y5
GND
8
9
Y6
IEC Logic Symbol
A
B
C
Bin/Oct
(1)
(2)
(3)
1
2
4
0
1
2
3
4
5
6
7
&
G1
G2 A
G2B
(6)
(4)
(5)
EN
(15)
(14)
(13)
(12)
(11)
(10)
(9)
(7)
A
B
C
Y0
Y1
Y2
(1)
(2)
(3)
Dmux
0
2
0
1
2
3
4
5
6
7
0
G
7
Y3
&
Y4
G1
G2 A
G2B
Y5
Y6
Y7
(6)
(4)
(5)
EN
(15)
(14)
(13)
(12)
(11)
(10)
(9)
(7)
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Truth Table
Inputs
Enable
Outputs
Selected Output
Select
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
G1
G2 A
G 2B
C
B
A
L
X
X
X
X
X
H
H
H
H
H
H
H
H
None
X
H
X
X
X
X
H
H
H
H
H
H
H
H
None
X
X
H
X
X
X
H
H
H
H
H
H
H
H
None
H
L
L
L
L
L
L
H
H
H
H
H
H
H
Y0
H
L
L
L
L
H
H
L
H
H
H
H
H
H
Y1
H
L
L
L
H
L
H
H
L
H
H
H
H
H
Y2
H
L
L
L
H
H
H
H
H
L
H
H
H
H
Y3
H
L
L
H
L
L
H
H
H
H
L
H
H
H
Y4
H
L
L
H
L
H
H
H
H
H
H
L
H
H
Y5
H
L
L
H
H
L
H
H
H
H
H
H
L
H
Y6
H
L
L
H
H
H
H
H
H
H
H
H
H
L
Y7
X: Don’t care
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TC7MET138AFK
System Diagram
15
14
A
1
13
12
Select
inputs
B
2
11
10
C
3
9
7
G2 A
Enable
inputs
G2B
G1
4
Y0
Y1
Y2
Y3
Y4
Data
outputs
Y5
Y6
Y7
5
6
Maximum Ratings
Characteristics
Symbol
Rating
Unit
Supply voltage range
VCC
−0.5~7.0
V
DC input voltage
VIN
−0.5~7.0
V
DC output voltage
VOUT
−0.5~7.0
−0.5~VCC + 0.5
(Note1)
V
(Note2)
Input diode current
IIK
−20
Output diode current
IOK
±20
DC output current
IOUT
±25
mA
DC VCC/ground current
ICC
±75
mA
Power dissipation
PD
180
mW
Storage temperature
Tstg
−65~150
°C
mA
(Note3)
mA
Note1: VCC = 0 V
Note2: High or low state. IOUT absolute maximum rating must be observed.
Note3: VOUT < GND, VOUT > VCC
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TC7MET138AFK
Recommended Operating Conditions
Characteristics
Symbol
Rating
Unit
Supply voltage
VCC
4.5~5.5
V
Input voltage
VIN
0~5.5
V
Output voltage
0~5.5
(Note4)
0~VCC
(Note5)
V
VOUT
Operating temperature
Topr
−40~85
°C
Input rise and fall time
dt/dv
0~20
ns/V
Note4: VCC = 0 V
Note5: High or low state.
Electrical Characteristics
DC Characteristics
Characteristics
Input voltage
Symbol
Ta = 25°C
Test Condition
Ta = −40~85°C
VCC (V)
Min
Typ.
Max
Min
Max
Unit
High level
VIH

4.5~5.5
2.0


2.0

Low level
VIL

4.5~5.5


0.8

0.8
4.4
4.5

4.4
VOH
VIN = VIH IOH = −50 µA
or VIL
IOH = −8 mA
4.5
High level

4.5
3.94


3.80

4.5

0
0.1

0.1
VOL
VIN = VIH IOL = 50 µA
or VIL
IOL = 8 mA
4.5


0.36

0.44
VIN = 5.5 V or GND
0~5.5


±0.1

±1.0
µA
VIN = VCC or GND
5.5


4.0

40.0
µA
5.5


1.35

1.50
mA
0


0.5

5.0
µA
Output voltage
Low level
Input leakage current
IIN
ICC
Quiescent supply current
ICCT
Output leakage current
IOPD
Per input: VIN = 3.4 V
V
V
Other input: VCC or GND
VOUT = 5.5 V
AC Characteristics (Input: tr = tf = 3 ns)
Characteristics
Symbol
Ta = 25°C
Test Condition
VCC (V) CL (pF)
Propagation delay time
tpLH
tpHL

tpLH
tpHL


( G2 - Y )
tpLH
tpHL
Input capacitance
CIN
Power dissipation capacitance
CPD
(A, B, C- Y )
Propagation delay time
(G1- Y )
Propagation delay time
5.0 ± 0.5
5.0 ± 0.5
5.0 ± 0.5
Ta = −40~85°C
Unit
Min
Typ.
Max
Min
Max
15

7.6
10.4
1.0
12.0
50

8.1
11.4
1.0
13.0
15

6.6
9.1
1.0
10.5
50

7.1
10.1
1.0
11.5
15

7.0
9.6
1.0
11.0
50

7.5
10.6
1.0
12.0

4
10

10
pF

49



pF

(Note6)
ns
ns
ns
Note6: 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
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TC7MET138AFK
Package Dimensions
Weight: 0.02 g (typ.)
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TC7MET138AFK
RESTRICTIONS ON PRODUCT USE
000707EBA
• TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor
devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical
stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of
safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of
such TOSHIBA products could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as
set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and
conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability
Handbook” etc..
• The TOSHIBA products listed in this document are intended for usage in general electronics applications
(computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances,
etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires
extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or
bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or
spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments,
medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this
document shall be made at the customer’s own risk.
• The products described in this document are subject to the foreign exchange and foreign trade laws.
• The information contained herein is presented only as a guide for the applications of our products. No
responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other
rights of the third parties which may result from its use. No license is granted by implication or otherwise under
any intellectual property or other rights of TOSHIBA CORPORATION or others.
• The information contained herein is subject to change without notice.
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