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| TC7MH245FK TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC7MH245FK Octal Bus Transceiver The TC7MH245FK is an advanced high speed CMOS octal bus transceiver 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. It is intended for two-way asynchronous communication between data busses. The direction of data transmission is determined by the level of the DIR input. The enable input ( G ) can be used to disable the device so that the busses are effectively isolated. All inputs are equipped with protection circuits against static discharge. Weight: 0.03 g (typ.) Features * * * * * * * High speed: tpd = 4.0 ns (typ.) (VCC = 5 V) Low power dissipation: ICC = 4 A (max) (Ta = 25C) High noise immunity: VNIH = VNIL = 28% VCC (min) Balanced propagation delays: tpLH tpHL - Wide operating voltage range: VCC (opr) = 2~5.5 V Low noise: VOLP = 1.0 V (max) Pin and function compatible with 74ALS245 Note: Do not apply a signal to any bus terminal when it is in the output mode. Damage may result. All floating (high impedance) bus terminals must have their input levels fixed by means of pull up or pull down resistors. A parasitic diode is formed between the bus and VCC terminals. Therefore bus terminal can not be used to interface 5 V to 3 V systems directly. 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. 2000-07-04 1/5 TC7MH245FK Pin Assignment (top view) IEC Logic Symbol DIR A1 A2 A3 A4 A5 A6 A7 A8 1 2 3 4 5 6 7 8 9 20 19 18 17 16 15 14 13 12 11 VCC G G DIR (19) (1) G3 3 EN 1 [BA] 3 EN 2 [AB] 1 2 (18) B1 B1 B2 A1 (2) A2 B3 B4 B5 B6 B7 A6 GND 10 B8 A7 A8 A3 A4 A5 (3) (4) (5) (6) (7) (8) (9) (17) (16) (15) (14) (13) (12) (11) B2 B3 B4 B5 B6 B7 B8 Truth Table Inputs G Outputs DIR L H X A=B B=A Z Function A-Bus Output Input Z B-Bus Input Output L L H X: Don't care Z: High impedance Maximum Ratings Characteristics Supply voltage range DC input voltage (DIR, G ) DC bus I/O voltage Input diode current (DIR, G ) Output diode current DC output current DC VCC/ground current Power dissipation Storage temperature Symbol VCC VIN VI/O 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 2000-07-04 2/5 TC7MH245FK Recommended Operating Conditions Characteristics Supply voltage Input voltage (DIR, G ) Bus I/O voltage Operating temperature Input rise and fall time Symbol VCC VIN VI/O 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 VIN = VIH or VIL IOH = -8 mA IOL = 50 A IOL = 4 mA IOL = 8 mA 3-state output off-state current Input leakage current Quiescent supply current IOZ IIN ICC VIN = VIH or VIL VOUT = VCC or GND VIN = 5.5 V or GND VIN = VCC or GND 3.0 4.5 3.0 4.5 2.0 3.0 4.5 3.0 4.5 5.5 0~5.5 5.5 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 0.25 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 2.50 1.0 40.0 A A A V Unit High level VOH Low level VOL 2000-07-04 3/5 TC7MH245FK AC Characteristics (Input: tr = tf = 3 ns) Characteristics Symbol Test Condition VCC (V) CL (pF) 3.3 0.3 Propagation delay time tpLH tpHL 5.0 0.5 15 50 15 50 15 50 15 50 50 50 50 50 Min (Note2) Ta = 25C Typ. 5.8 8.3 4.0 5.5 8.5 11.0 5.8 7.3 11.5 7.0 4 8 21 Max 8.4 11.9 5.5 7.5 13.2 16.7 8.5 10.6 15.8 9.7 1.5 1.0 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 Max 10.0 13.5 6.5 8.5 15.5 19.0 10.0 12.0 18.0 ns 11.0 1.5 ns 1.0 10 pF pF pF ns ns Unit 3.3 0.3 3-state output enable time tpZL tpZH RL = 1 k 5.0 0.5 tpLZ tpHZ tosLH tosHL CIN CI/O CPD DIR, G An, Bn 3.3 0.3 5.0 0.5 (Note1) 3.3 0.3 5.0 0.5 3-state output disable time RL = 1 k Output to output skew Input capacitance Bus input capacitance Power dissipation capacitance Note1: This parameter is guaranteed by design. tosLH = |tpLHm - tpLHn|, tosHL = |tpHLm - tpHLn| Note2: 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) Noise Characteristics (Input: tr = tf = 3 ns) Characteristics Quiet output maximum dynamic VOL Quiet output minimum dynamic VOL 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. 0.7 -0.7 Limit 1.0 -1.0 3.5 1.5 V V V V Unit Minimum high level dynamic input voltage VIH Maximum low level dynamic input voltage VIL Input Equivalent Circuit Bus Terminal Equivalent Circuit Input I/O 2000-07-04 4/5 TC7MH245FK Package Dimensions Weight: 0.03 g (typ.) 2000-07-04 5/5 |
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