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TC7MET244AFK Dataheets PDF



Part Number TC7MET244AFK
Manufacturers Toshiba
Logo Toshiba
Description Octal Bus Buffer
Datasheet TC7MET244AFK DatasheetTC7MET244AFK Datasheet (PDF)

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 buff.

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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 3-state buffer, and has two active-low output enables. These devices are designed to be used with 3-state memory Weight: 0.03 g (typ.) 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 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 Low noise: VOLP = 1.0 V (max) Pin and function compatible with the 74 series (74AC/HC/F/ALS/LS etc.) 240/244 type. 1 2001-09-12 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 1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1 1Y1 1Y1 2A4 1Y2 2A3 1Y3 2A2 1Y4 2A1 1A2 2Y3 2A4 1Y 2 1A3 2Y 2 2A3 1Y 3 1A4 2 Y1 2A2 1Y 4 GND 10 2A1 GND 10 IEC Logic Symbol TC7MET240AFK 1G 1A1 1A2 1A3 1A4 (1) (2) (4) (6) (8) EN (18) (16) (14) (12) 1Y1 1Y 2 1G TC7MET244AFK (1) (2) (4) (6) (8) EN (18) (16) (14) (12) 1Y 3 1Y 4 1A1 1A2 1A3 1A4 1Y1 1Y2 1Y3 1Y4 2G 2A1 2A2 2A3 2A4 (19) (11) (13) (15) (17) EN (9) (7) (5) (3) 2 Y1 2Y 2 2G 2A1 2A2 2A3 2A4 (19) (11) (13) (15) (17) EN (9) (7) (5) (3) 2Y3 2Y 4 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 2 2001-09-12 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 Unit V V (Note1) 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 Unit V V (Note4) (Note5) °C ns/V V 0~20 Note4: Output in off-state Note5: High or low state 3 2001-09-12 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 ¾ ¾ Ta = 25°C Min 2.0 ¾ Ta = -40~85°C Max ¾ Unit Typ. ¾ ¾ Min 2.0 ¾ Max ¾ 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 0 V 0.8 ¾ ¾ 0.8 ¾ ¾ VIN = VIH IOH = -50 mA or VIL IOH = -8 mA VIN = VIH IOL = 50 mA 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 4.4 3.94 ¾ ¾ ー ¾ ¾ ¾ ¾ 4.5 ¾ 4.4 3.80 ¾ ¾ ー ¾ ¾ ¾ ¾ V 0 ¾ ー ¾ ¾ ¾ ¾ 0.1 0.36 ±0.25 ±0.1 0.1 0.44 ±2.50 ±1.0 mA mA mA 3-state output off-state current Input leakage current IOZ IN ICC 4.0 1.35 0.5 40.0 1.50 5.0 Quiescent supply current ICCT Output leakage current IOPD mA mA 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) ¾ Ta = 25°C CL (pF) 15 50 Min ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ Ta = -40~85°C Max 7.8 8.8 7.4 8.4 10.4 11.4 11.4 1.0 10 ¾ ¾ ¾ Unit Typ. 5.6 6.1 5.4 5.9 7.7 8.2 8.8 ¾ Min 1.0 1.0 1.0 1.0 1.0 1.0 1.0 ¾ ¾ ¾ ¾ ¾ Max 9.0 10.0 8.5 9.5 12.0 13.0 13.0 1.0 10 ¾ ¾ ¾ 5.0 ± 0.5 ns ¾ 5.0 ± 0.5 15 50 15 50 50 50 ns RL = 1 kW RL = 1 kW 5.0 ± 0.5 5.0 ± 0.5 (Note6) 5.0 ± 0.5 ¾ ¾ ns 3-state output disable time Output to output skew Input capacitance Output capacitance Power dissipation capacitance (Note7) ns ns pF pF pF 4 9 19 18 .


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