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TC7MH138FK
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC7MH138FK
3-to-8 Line Decoder
The TC7MH138FK is an advanced high speed CMOS 3-to-8 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 Weight: 0.02 g (typ.) connection and for use as an address decoder for memory systems. An input protection circuit ensures that 0 to 7 V can be applied to the input pins without regard to the supply voltage. This device can be used to interface 5 V to 3 V systems and two supply systems such as battery back up. This circuit prevents device destruction due to mismatched supply and input voltages.
Features
* * * * * * * High speed: tpd = 5.7 ns (typ.) (VCC = 5 V) Low power dissipation: ICC = 4 A (max) (Ta = 25C) High noise immunity: VNIH = VNIL = 28% VCC (min) Power down protection is provided on all inputs. Balanced propagation delays: tpLH tpHL - Wide operating voltage range: VCC (opr) = 2~5.5 V Pin and function compatible with 74ALS138
000630EBA1
* 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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TC7MH138FK
Pin Assignment (top view)
A B C
G2A G2B
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
VCC
Y0
Y1 Y2
Y3
G1 Y7 GND
Y4
Y5 Y6
IEC Logic Symbol
(1) (2) (3) Bin/Oct 1 2 4 0 1 2 3 4 5 6 7 (15) (14) (13) (12) (11) (10) (9) (7) (1) (2) (3) Dmux 0 2 0 G 7 0 1 2 3 4 5 6 7 (15) (14) (13) (12) (11) (10) (9) (7)
A B C
Y0
Y1 Y2
Y3
A B C
Y0
Y1 Y2
Y3
G1 G2 A G2B
(6) (4) (5)
Y4
Y5 Y6
EN
Y7
G1 G2 A G2B
(6) (4) (5)
Y4
Y5 Y6
Y7
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TC7MH138FK
Truth Table
Inputs Enable G1 L X X H H H H H H H H
G2 A
Outputs Select
Y0
Selected Output Y1 H H H H L H H H H H H Y2 H H H H H L H H H H H
Y3
Y4 H H H H H H H L H H H
Y5
Y6
Y7 H H H H H H H H H H L None None None
Y0
G 2B
C X X X L L L L H H H H
B X X X L L H H L L H H
A X X X L H L H L H L H H H H L H H H H H H H H H H H H H L H H H H H H H H H H H H L H H H H H H H H H H H L H
X H X L L L L L L L L
X X H L L L L L L L L
Y1 Y2
Y3
Y4
Y5 Y6
Y7
X: Don't care
Logic Diagram
15 14 A 1 13 12 Select inputs B 2 11 10 C 3 9 7
G2 A
Y0
Y1 Y2
Y3
Y4
Y5 Y6
Data outputs
4 5 6
Y7
Enable inputs
G2B
G1
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Maximum Ratings
Characteristics Supply voltage range DC input voltage DC output voltage Input diode current Output diode current DC output current DC VCC/ground current Power dissipation Storage temperature Symbol VCC VIN VOUT IIK IOK IOUT ICC PD Tstg Rating -0.5~7.0 -0.5~7.0 -0.5~VCC + 0.5 -20 20 25 75 180 -65~150 Unit V V V mA mA mA mA mW C
Recommended Operating Conditions
Characteristics Supply voltage Input voltage Output voltage Operating temperature Input rise and fall time Symbol VCC VIN VOUT Topr dt/dv Rating 2.0~5.5 0~5.5 0~VCC -40~85 0~100 (VCC = 3.3 0.3 V) 0~20 (VCC = 5 0.5 V) Unit V V V C ns/V
Electrical Characteristics DC Characteristics
Characteristics Symbol Test Condition VCC (V) 2.0 High level Input voltage 2.0 Low level VIL 3.0~5.5 2.0 VIN = VIH or VIL IOH = -50 A IOH = -4 mA Output voltage IOH = -8 mA IOL = 50 A 3.0 4.5 3.0 4.5 2.0 3.0 4.5 IOL = 4 mA IOL = 8 mA Input leakage current Quiescent supply current IIN ICC VIN = 5.5 V or GND VIN = VCC or GND 3.0 4.5 0~5.5 5.5 VIN = VIH or VIL VIH 3.0~5.5 Min 1.50 VCC x 0.7 1.9 2.9 4.4 2.58 3.94 Ta = 25C Typ. 2.0 3.0 4.5 0 0 0 Max 0.50 VCC x 0.3 0.1 0.1 0.1 0.36 0.36 0.1 4.0 Ta = -40~85C Min 1.50 VCC x 0.7 1.9 2.9 4.4 2.48 3.80 Max V 0.50 VCC x 0.3 0.1 0.1 0.1 0.44 0.44 1.0 40.0 A A V Unit
High level
VOH
Low level
VOL
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AC Characteristics (Input: tr = tf = 3 ns)
Characteristics Symbol Test Condition VCC (V) CL (pF) 3.3 0.3 tpLH tpHL 5.0 0.5 15 50 15 50 15 50 15 50 15 50 15 50 Min (Note) Ta = 25C Typ. 8.2 10.0 5.7 7.2 8.1 10.6 5.6 7.1 8.2 10.7 5.8 7.3 4 34 Max 11.4 15.8 8.1 10.1 12.8 16.3 8.1 10.1 11.4 14.9 8.1 10.1 10 Ta = -40~85C Min 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Max 13.5 18.0 9.5 11.5 15.0 18.5 9.5 11.5 13.5 17.0 9.5 11.5 10 pF pF ns ns ns Unit
Propagation delay time (A, B, C- Y )
Propagation delay time (G1- Y )
3.3 0.3 tpLH tpHL 5.0 0.5
Propagation delay time ( G2 - Y )
3.3 0.3 tpLH tpHL 5.0 0.5 CIN CPD
Input capacitance Power dissipation capacitance
Note: 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
Input Equivalent Circuit
Input
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Package Dimensions
Weight: 0.02 g (typ.)
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