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TC7MET240,244AFK
TOSHIBA CMOS Didital Integrated Circuit Silicon Monolithic
TC7MET240AFK, TC7MET244AFK
Octal Bus Buffer TC7MET240AFK Inverted, 3-State Outputs TC7MET244AFK Non-Inverted, 3-State Outputs
The TC7MET240AFK and 244AFK are advanced high speed CMOS octal bus buffers fabricated with silicon gate C2MOS technology. They achieve the high speed operation similar to equivalent bipolar schottky TTL while maintaining the CMOS low power dissipation. The TC7MET240AFK is an inverting 3-state buffer having two active-low output enables. TC7MET244AFK is a non-inverting Weight: 0.03 g (typ.) 3-state buffer, and has two active-low output enables. These devices are designed to be used with 3-state memory address drivers, etc. The input voltage are compatible with TTL output voltage. These devices 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. *: output in off-state
Features
* * * * * * * High speed: tpd = 5.6 ns (typ.) (VCC = 5 V) Low power dissipation: ICC = 4 A (max) (Ta = 25C) 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
Low noise: VOLP = 1.0 V (max)
Pin and function compatible with the 74 series (74AC/HC/F/ALS/LS etc.) 240/244 type.
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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TC7MET240,244AFK
Pin Assignment (top view)
TC7MET240AFK
1G
TC7MET244AFK 20 19 18 17 16 15 14 13 12 11 VCC
2G 1G
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9
20 19 18 17 16 15 14 13 12 11
VCC
2G
1A1 2Y 4 1A2
2Y3
1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1
1Y1 2A4 1Y 2 2A3
1Y 3
1Y1 2A4 1Y2 2A3 1Y3 2A2 1Y4 2A1
1A3 2Y 2 1A4 2 Y1
2A2 1Y 4 2A1
GND 10
GND 10
IEC Logic Symbol
TC7MET240AFK 1G 1A1 1A2 1A3 1A4 (1) (2) (4) (6) (8) EN (18) (16) (14) (12) 1Y1 1Y 2 1Y 3 1Y 4
1G
TC7MET244AFK (1) (2) (4) (6) (8) EN (18) (16) (14) (12) 1Y1 1Y2 1Y3 1Y4
1A1 1A2 1A3 1A4
2G 2A1 2A2 2A3 2A4
(19) (11) (13) (15) (17)
EN (9) (7) (5) (3) 2 Y1 2Y 2 2Y3 2Y 4
2G 2A1 2A2 2A3 2A4
(19) (11) (13) (15) (17)
EN (9) (7) (5) (3) 2Y1 2Y2 2Y3 2Y4
Truth Table
Inputs
G
Outputs An L H X Yn L H Z
Yn
L L H
H L Z
X: Don't care Z: High impedance Yn: TC7MET244AFK Y n : TC7MET240AFK
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TC7MET240,244AFK
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 -0.5~7.0 (Note1) Unit V V V mA (Note3) mA mA mA mW C
-0.5~VCC + 0.5 (Note2) -20 20 25 75 180 -65~150
Note1: Output in off-state Note2: High or low state. IOUT absolute maximum rating must be observed. Note3: VOUT < GND, VOUT > VCC
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 4.5~5.5 0~5.5 0~5.5 0~VCC -40~85 0~20 (Note4) (Note5) C ns/V Unit V V V
Note4: Output in off-state Note5: High or low state
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TC7MET240,244AFK
Electrical Characteristics DC Characteristics
Characteristics High level Low level High level Output voltage Low level VOL Symbol VIH VIL VOH Test Condition VCC (V) Input voltage VIN = VIH IOH = -50 A or VIL IOH = -8 mA VIN = VIH IOL = 50 A or VIL IOL = 8 mA VIN = VIH or VIL VOUT = VCC or GND VIN = 5.5 V or GND VIN = VCC or GND Per input: VIN = 3.4 V Other input: VCC or GND VOUT = 5.5 V 0 4.5~5.5 4.5~5.5 4.5 4.5 4.5 4.5 5.5 0~5.5 5.5 5.5 Min 2.0 4.4 3.94 Ta = 25C Typ. 4.5 0 Max 0.8 0.1 0.36 0.25 0.1 4.0 1.35 0.5 Ta = -40~85C Min 2.0 4.4 3.80 Max 0.8 0.1 0.44 2.50 1.0 40.0 1.50 5.0 A A A mA A V V Unit
3-state output off-state current Input leakage current
IOZ IN ICC
Quiescent supply current ICCT Output leakage current IOPD
AC Characteristics (Input: tr = tf = 3 ns)
Characteristics Propagation delay time (TC7MET240AFK) Propagation delay time (TC7MET244AFK) 3-state output enable time Symbol tpLH tpHL tpLH tpHL tpZL tpZH tpLZ tpHZ tosLH tosHL CIN COUT CPD TC7MET240AFK TC7MET244AFK Test Condition VCC (V) CL (pF) 5.0 0.5 15 50 5.0 0.5 15 50 15 50 50 50 Min Ta = 25C Typ. 5.6 6.1 5.4 5.9 7.7 8.2 8.8 4 9 19 18 Max 7.8 8.8 7.4 8.4 10.4 11.4 11.4 1.0 10 Ta = -40~85C Min 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Max 9.0 10.0 8.5 9.5 12.0 13.0 13.0 1.0 10 ns ns pF pF pF ns ns ns Unit
RL = 1 k RL = 1 k
5.0 0.5 5.0 0.5 (Note6) 5.0 0.5
3-state output disable time Output to output skew Input capacitance Output capacitance Power dissipation capacitance (Note7)
Note6: Parameter guaranteed by design. tosLH = |tpLHm - tpLHn|, tosHL = |tpHLm - tpHLn| Note7: 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/8 (per bit)
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TC7MET240,244AFK
Noise Characteristics (Input: tr = tf = 3 ns)
Characteristics Quiet output maximum dynamic VOL Quiet output minimum dynamic VOL Minimum high level dynamic input voltage VIH Maximum high level dynamic input voltage VIL Symbol VOLP VOLV VIHD VILD Test Condition VCC (V) CL = 50 pF CL = 50 pF CL = 50 pF CL = 50 pF 5.0 5.0 5.0 5.0 Ta = 25C Typ. 0.8 -0.8 Limit 1.0 -1.0 2.0 0.8 V V V V Unit
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TC7MET240,244AFK
Package Dimensions
Weight: 0.03 g (typ.)
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