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 µA (max) (Ta = 25°C) • 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. 1 2001-10-23 TC7MH245FK Pin Assignment (top view) IEC Logic Symbol DIR 1 20 VCC A1 2 19 G A2 3 18 B1 A3 17 4 G DIR A1 B2 A4 5 16 B3 A5 6 15 B4 A3 A6 7 14 B5 A4 A7 8 13 B6 A8 9 12 B7 A5 A6 11 G3 3 EN 1 [BA] 3 EN 2 [AB] (2) (18) 1 B1 2 A2 GND 10 (19) (1) B8 A7 A8 (3) (17) (4) (16) (5) (15) (6) (14) (7) (13) (8) (12) (9) (11) B2 B3 B4 B5 B6 B7 B8 Truth Table Inputs Function Outputs G DIR A-Bus B-Bus L L A=B Output Input L H B=A Input Output H X Z Z X: Don’t care Z: High impedance Maximum Ratings Characteristics Symbol Rating Unit Supply voltage range VCC −0.5~7.0 V DC input voltage (DIR, G ) VIN −0.5~7.0 V DC bus I/O voltage VI/O −0.5~VCC + 0.5 V Input diode current (DIR, G ) IIK −20 mA Output diode current IOK ±20 mA DC output current IOUT ±25 mA DC VCC/ground current ICC ±75 mA Power dissipation PD 180 mW Storage temperature Tstg −65~150 °C 2 2001-10-23 TC7MH245FK Recommended Operating Conditions Characteristics Symbol Rating Unit Supply voltage VCC 2.0~5.5 V Input voltage (DIR, G ) VIN 0~5.5 V Bus I/O voltage VI/O 0~VCC V Operating temperature Topr −40~85 °C Input rise and fall time 0~100 (VCC = 3.3 ± 0.3 V) dt/dv 0~20 (VCC = 5 ± 0.5 V) ns/V Electrical Characteristics DC Characteristics Characteristics High level Symbol Ta = 25°C Test Condition Min Typ. Max Min Max 2.0 1.50 1.50 3.0~5.5 VCC × 0.7 VCC × 0.7 2.0 0.50 0.50 3.0~5.5 VCC × 0.3 VCC × 0.3 2.0 1.9 2.0 1.9 3.0 2.9 3.0 2.9 4.5 4.4 4.5 4.4 IOH = −4 mA 3.0 2.58 2.48 IOH = −8 mA 4.5 3.94 3.80 2.0 0 0.1 0.1 3.0 0 0.1 0.1 4.5 0 0.1 0.1 IOL = 4 mA 3.0 0.36 0.44 IOL = 8 mA 4.5 0.36 0.44 5.5 ー ー ±0.25 ー ±2.50 µA Input voltage Low level VIL IOH = −50 µA High level VOH VIN = VIH or VIL Output voltage IOL = 50 µA Low level VOL Unit VCC (V) VIH Ta = −40~85°C VIN = VIH or VIL VIN = VIH or VIL V V 3-state output off-state current IOZ Input leakage current IIN VIN = 5.5 V or GND 0~5.5 ±0.1 ±1.0 µA Quiescent supply current ICC VIN = VCC or GND 5.5 4.0 40.0 µA VOUT = VCC or GND 3 2001-10-23 TC7MH245FK AC Characteristics (Input: tr = tf = 3 ns) Characteristics Symbol Ta = 25°C Test Condition VCC (V) CL (pF) Min Typ. Max Min Max 15 5.8 8.4 1.0 10.0 50 8.3 11.9 1.0 13.5 15 4.0 5.5 1.0 6.5 50 5.5 7.5 1.0 8.5 15 8.5 13.2 1.0 15.5 50 11.0 16.7 1.0 19.0 15 5.8 8.5 1.0 10.0 50 7.3 10.6 1.0 12.0 3.3 ± 0.3 50 11.5 15.8 1.0 18.0 5.0 ± 0.5 50 7.0 9.7 1.0 11.0 3.3 ± 0.3 50 1.5 1.5 5.0 ± 0.5 50 1.0 1.0 3.3 ± 0.3 tpLH tpHL Propagation delay time 5.0 ± 0.5 3.3 ± 0.3 tpZL tpZH 3-state output enable time RL = 1 kΩ 5.0 ± 0.5 tpLZ tpHZ 3-state output disable time Output to output skew RL = 1 kΩ tosLH tosHL (Note1) Ta = −40~85°C Unit ns ns ns ns Input capacitance CIN DIR, G 4 10 10 pF Bus input capacitance CI/O An, Bn 8 pF Power dissipation capacitance CPD 21 pF (Note2) 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 Symbol Ta = 25°C Test Condition VCC (V) Typ. Limit Unit Quiet output maximum dynamic VOL VOLP CL = 50 pF 5.0 0.7 1.0 V Quiet output minimum dynamic VOL VOLV CL = 50 pF 5.0 −0.7 −1.0 V Minimum high level dynamic input voltage VIH VIHD CL = 50 pF 5.0 3.5 V Maximum low level dynamic input voltage VIL VILD CL = 50 pF 5.0 1.5 V Input Equivalent Circuit Bus Terminal Equivalent Circuit An, Bn An, Bn Input I/O 4 2001-10-23 TC7MH245FK Package Dimensions Weight: 0.03 g (typ.) 5 2001-10-23 TC7MH245FK 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. 6 2001-10-23