TC7MBL3245BFT/FK TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC7MBL3245BFT, TC7MBL3245BFK Octal Low Voltage Bus Switch The TC7MBL3245B provides eight bits of low-voltage, high-speed bus switching in a standard ’245 device pinout. The low ON-resistance of the switch allows connections to be made with minimal propagation delay and while maintaining CMOS low power dissipation. The device comprises a single 8-bit switch. When output enable ( OE ) is low, the switch is on and port A is connected to port B. When OE is high, the switch is open and a high-impedance state exists between the two ports. All inputs are equipped with protection circuits to guard against static discharge. TC7MBL3245BFT TC7MBL3245BFK Features • Operating voltage: VCC = 1.65~3.6 V • Low capacitance: CI/O=19pF • Low ON-resistance: RON = 4 Ω (typ.) @3V • ESD performance: Machine model ≥ ±200 V Human body model ≥ ±2000 V • Power-down protection for inputs ( OE input only) • Package: TSSOP20,VSSOP (US20) • Pin compatible with the 74xx245 type Switch On (typ.) @3V Weight: TSSOP20-P-0044-0.65A VSSOP20-P-0030-0.50 Pin Assignment (top view) NC 1 20 VCC A1 2 19 OE A2 3 18 B1 A3 4 17 B2 A4 5 16 B3 A5 6 15 B4 A6 7 14 B5 A7 8 13 B6 A8 9 12 B7 GND 10 11 B8 : 0.08 g (typ.) : 0.03 g (typ.) (top view) NC-No Internal Connection 1 2007-10-19 TC7MBL3245BFT/FK Truth Table Inputs Function OE L A port = B port H Disconnect System Diagram A1 B1 A8 B8 OE Absolute Maximum Ratings (Note) Characteristic Symbol Rating Unit Power supply range VCC −0.5~4.6 V Control pin input voltage VIN −0.5~4.6 V Switch terminal I/O voltage VS −0.5~Vcc+0.5 V Clump diode current IIK Control input pin Switch terminal −50 ±50 mA Switch I/O current IS 128 mA Power dissipation PD 180 mW DC VCC/GND current ICC/IGND ±100 mA Storage temperature Tstg −65~150 °C Note: Exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in IC performance or even destruction Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the significant change in temperature, etc.) may cause this product to decrease in the reliability significantly even if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute maximum ratings and the operating ranges. Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook (“Handling Precautions”/“Derating Concept and Methods”) and individual reliability data (i.e. reliability test report and estimated failure rate, etc). Operating Ranges (Note) Characteristic Symbol Rating Unit Power supply voltage VCC 1.65~3.6 V Control pin input voltage VIN 0~3.6 V Switch I/O voltage VS 0~Vcc V Operating temperature Topr −40~85 °C Input rise and fall time dt/dv 0~10 ns/V Note: The operating ranges must be maintained to ensure the normal operation of the device. 2 2007-10-19 TC7MBL3245BFT/FK Electrical Characteristics DC Characteristics (Ta = −40 to 85°C) Characteristic Symbol Test Condition High-level control input voltage VIH ⎯ Low-level control input voltage VIL ⎯ Control input current IIN Power off leakage current IOFF Off-stage leakage current (switch off) ISZ Switch ON-resistance (Note 2) Quiescent supply current RON ICC Min Typ. Max 1.65 to 3.6 0.7 × VCC ⎯ ⎯ 1.65 to 3.6 ⎯ ⎯ 0.3 × VCC 1.65 to 3.6 ⎯ ⎯ ±1.0 μA 0 ⎯ ⎯ 1.0 μA 1.65 to 3.6 ⎯ ⎯ ±1.0 μA VCC (V) VIN = 0 to 3.6 V OE = 0 to 3.6 V A, B = 0 to VCC, OE = VCC VIS = 0 V, IIS = 30 mA (Note 1) 3.0 ⎯ 4 7 VIS = 3.0 V, IIS = 30 mA (Note 1) 3.0 ⎯ 6 9 VIS = 2.4 V, IIS = 15 mA (Note 1) 3.0 ⎯ 7 12 VIS = 0 V, IIS = 24 mA (Note 1) 2.3 ⎯ 4 8 VIS = 2.3 V, IIS = 24 mA (Note 1) 2.3 ⎯ 7 11 VIS = 2.0 V, IIS = 24 mA (Note 1) 2.3 ⎯ 8 13 3.6 ⎯ ⎯ 10 VIN = VCC or GND, IOUT = 0 Unit V Ω μA Note 1: All typical values are at Ta = 25°C. Note 2: Measured by voltage drop between A and B pins at indicated current through the switch. ON-resistance is determined by the lower of the voltages on the two pins (A or B). AC Characteristics (Ta = −40 to 85°C) Characteristic Output enable time Output disable time Symbol tpZL tpZH tpLZ tpHZ Test Condition Figure 1, Figure 2 Figure 1, Figure 2 Min Max 3.3 ± 0.3 ⎯ 6 2.5 ± 0.2 ⎯ 7 1.8 ± 0.15 ⎯ 11 3.3 ± 0.3 ⎯ 6 2.5 ± 0.2 ⎯ 7 1.8 ± 0.15 ⎯ 11 VCC (V) Unit ns ns Capacitive Characteristics (Ta = 25°C) Characteristic (Note) Symbol Control input capacitance CIN Switch terminal capacitance CI/O Note: Test Condition Typ. Unit 3.0 3 pF OE = VCC Switch Off 3.0 9 pF OE = GND Switch On 3.0 19 pF VCC (V) This parameter is guaranteed by design. 3 2007-10-19 TC7MBL3245BFT/FK RON − VIN Characteristic Curves (Typ.) , Ta = 25°C 40 35 RON (Ω) 30 25 20 Vcc = 3.0V 15 Vcc = 2.3V 10 5 0 0 0.5 1 1.5 2 2.5 3 VIS (V) AC Test Circuit RL Switch Open 2 x Vcc GND Measure RL CL Output CL = 50 pF RL = 500 Ω Parameter Switch tpLH, tpHL Open tpLZ, tpZL 2 × VCC tpHZ, tpZH GND Figure 1 AC Waveforms tf 2.5 ns tr 2.5 ns VCC 90% 50% Output Enable ( OE ) 10% tpLZ GND tpZL VOH Output (A, B) Low to Off to Low 50% 10% tpHZ VOL tpZH VOH 90% Output (A, B) High to Off to High 50% VOL Outputs enabled Outputs disabled Outputs enabled Figure 2 tpLZ, tpHZ, tpZL, tpZH 4 2007-10-19 TC7MBL3245BFT/FK Rise and Fall Times (tr / tf) of the TC7MBL3245B I/O Signals The tr(out) and tf(out) values of the output signals are affected by the CR time constant of the input, which consists of the switch terminal capacitance (CI/O) and the on-resistance (RON) of the input. In practice, the tr(out) and tf(out) values are also affected by the circuit’s capacitance and resistance components other than those of the TC7MBL3245B. The tr / tf (out) values can be approximated as follows. (Figure 4 shows the test circuit.) tr / tf out (approx) = - ( CI/O + CL ) ･ (RDRIVE+ RON) ･ ln ( ( ( VOH – VOL ) – VM) / ( VOH – VOL ) ) where, RDRIVE is the output impedance of the previous-stage circuit. Calculation example: tr out (approx) = - ( 19+ 15 )E-12 ･ ( 120 + 4) ･ ln ( ( ( 3.0 - 0 ) – 1.5 ) / ( 3.0 – 0 ) ) ≈ 3.0ns Calculation conditions: VCC = 3.0V , CL = 15pF , RDRIVE = 120Ω(output impedance of the previous IC), VM = 1.5V(VCC / 2) Output of the previous IC = digital (i.e., high-level voltage = VCC; low-level voltage = GND) Previous IC Waveform generated without the TC7MBL3245B Measure RDRIVE CL VCC GND RDRIVE = output impedance of the previous IC Previous IC TC7MBL3245B Waveform generated with the TC7MBL3245B added RDRIVE An/Bn CI/O (Switch On) Bn/An Measure VOH = VM VM VOL CL RON tr out tf out RDRIVE = output impedance of the previous IC Parameter VM VCC 3.3 ± 0.3 V 2.5 ± 0.2 V 1.8 ± 0.15 V VCC / 2 VCC / 2 VCC / 2 Figure 3 Test Circuit 5 2007-10-19 TC7MBL3245BFT/FK Package Dimensions Weight: 0.08 g (typ.) 6 2007-10-19 TC7MBL3245BFT/FK Package Dimensions Weight: 0.03 g (typ.) 7 2007-10-19 TC7MBL3245BFT/FK RESTRICTIONS ON PRODUCT USE 20070701-EN • The information contained herein is subject to change without notice. • 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 his document shall be made at the customer’s own risk. • The products described in this document shall not be used or embedded to any downstream products of which manufacture, use and/or sale are prohibited under any applicable laws and regulations. • Please contact your sales representative for product-by-product details in this document regarding RoHS compatibility. Please use these products in this document in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances. Toshiba assumes no liability for damage or losses occurring as a result of noncompliance with applicable laws and regulations. 8 2007-10-19