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| TC74LCX646FS TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74LCX646FS Low-Voltage Octal Bus Transceiver/Register with 5-V Tolerant Inputs and Outputs The TC74LCX646FS is a high performance CMOS octal bus transceiver/register. Designed for use in 3.3-V systems, it achieves high-speed operation while maintaining the CMOS low power dissipation. The device is designed for low-voltage (3.3 V) VCC applications, but it could be used to interface to 5-V supply environment for both inputs and outputs. This device is bus transceiver with 3-state outputs, D-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the internal registers. All inputs are equipped with protection circuits against static discharge. Weight: 0.14 g (typ.) Features * * * * * * * * Low-voltage operation: VCC = 2.0 to 3.6 V High-speed operation: tpd = 7.0 ns (max) (VCC = 3.0 to 3.6 V) Output current: |IOH|/IOL = 24 mA (min) (VCC = 3.0 V) Latch-up performance: -500 mA Available in SSOP Bidirectional interface between 5.0 V and 3.3 V signals Power-down protection provided on all inputs Pin and function compatible with the 74 series (74AC/HC/F/ALS/LS etc.) 646 type Note 1: Do not apply a signal to any bus pins when it is in the output mode. Damage may result. All floating (high impedance) bus pins must have their input levels fixed by means of pull-up or pull-down resistors. 1 2007-10-19 TC74LCX646FS Pin Assignment (top view) IEC Logic Symbol OE DIR CBA SBA CAB SAB 21 3 23 22 1 2 G3 CAB SAB DIR A1 A2 A3 A4 A5 A6 1 2 3 4 5 6 7 8 9 24 VCC CBA SBA 23 22 21 20 19 18 17 16 15 14 13 OE B1 B2 B3 B4 B5 B6 B7 B8 3EN1 [BA] 3EN2 [AB] C4 G5 C6 G7 > A1 4 1 5 4D 1 1 2 20 B1 A2 A3 A4 A5 A6 A7 A8 5 6 7 8 9 10 11 1 5 6D 7> 17 19 18 17 16 15 14 13 B2 B3 B4 B5 B6 B7 B8 A7 10 A8 11 GND 12 2 2007-10-19 TC74LCX646FS Truth Table Control Inputs Bus SAB X SBA X A Input Z X Input X* X* L X L H X* L H X* X* H X L X L H X L X* H X H Output X* X* X L L H X* L L X* X* X H X L L H Qn L X* X H H B Input Z X Output L H L H Qn L H Input L H L H X L H The data on the B bus are displayed on the A bus, and are stored into the B storage flip-flops on the rising edge of CBA. The data in the B storage flip-flops are displayed on the A bus. The data on the B bus are stored into the B storage flip-flops on the rising edge of CBA, and the stored data propagate directly onto the A bus. The data on the B bus are displayed on the A bus. The data on the A bus are displayed on the B bus, and are stored into the A storage flip-flops on the rising edge of CAB. The data in the A storage flop-flops are displayed on the B bus. The data on the A bus are stored into the A storage flip-flops on the rising edge of CAB, and the stored data propagate directly onto the B bus. The data on the A bus are displayed on the B bus. OE DIR CAB X* CBA X* Function The output functions of A and B busses are disabled. Both A and B busses are used as inputs to the internal flip-flops. Data on the bus will be stored on the rising edge of the Clock. H X X X X: Don't care Z: High impedance Qn: The data stored into the internal flip-flops by most recent low to high transition of the clock inputs. *: The clocks are not internally with either OE or DIR. Therefore, data on the A and/or B busses may be clocked into the storage flip-flops at any time. 3 2007-10-19 TC74LCX646FS System Diagram 21 OE DIR 3 A1 4 A D CK Q A B B Q D CK 20 B1 A8 CAB SAB 11 1 2 A Same as above block 13 23 B B8 CBA SBA 22 A B Timing Chart OE DIR SAB SBA CAB CBA A B A: Input B: Output A: Output B: Input A: Z B: Z : Don't care Z: High impedance 4 2007-10-19 TC74LCX646FS Absolute Maximum Ratings (Note 1) Characteristics Power supply voltage DC input voltage (DIR, OE , CAB, CBA, SAB, SBA) Symbol VCC VIN Rating -0.5 to 7.0 -0.5 to 7.0 -0.5 to 7.0 (Note 2) DC bus I/O voltage VI/O -0.5 to VCC + 0.5 (Note 3) Input diode current Output diode current DC output current Power dissipation DC VCC/ground current Storage temperature IIK IOK IOUT PD ICC/IGND Tstg -50 50 50 180 100 -65 to 150 (Note 4) mA mA mA mW mA C V Unit V V Note 1: 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). Note 2: Output in OFF state Note 3: High or low state. IOUT absolute maximum rating must be observed. Note 4: VOUT < GND, VOUT > VCC Operating Ranges (Note 1) Characteristics Power supply voltage Input voltage (DIR, OE , CAB, CBA, SAB, SBA) Bus I/O voltage Symbol VCC Rating 2.0 to 3.6 1.5 to 3.6 0 to 5.5 0 to 5.5 0 to VCC 24 12 -40 to 85 0 to 10 (Note 7) (Note 3) (Note 4) (Note 5) (Note 6) (Note 2) Unit V VIN V VI/O V Output current Operating temperature Input rise and fall time IOH/IOL Topr dt/dv mA C ns/V Note 1: The operating ranges must be maintained to ensure the normal operation of the device. Unused inputs must be tied to either VCC or GND. Note 2: Data retention only Note 3: Output in OFF state Note 4: High or low state Note 5: VCC = 3.0 to 3.6 V Note 6: VCC = 2.7 to 3.0 V Note 7: VIN = 0.8 to 2.0 V, VCC = 3.0 V 5 2007-10-19 TC74LCX646FS Electrical Characteristics DC Characteristics (Ta = -40 to 85C) Characteristics H-level L-level Symbol VIH VIL Test Condition IOH = -100 A H-level VOH VIN = VIH or VIL IOH = -12 mA IOH = -18 mA Output voltage IOH = -24 mA IOL = 100 A L-level VOL VIN = VIH or VIL IOL = 12 mA IOL = 16 mA IOL = 24 mA Input leakage current 3-state output OFF state current Power-off leakage current Quiescent supply current Increase in Icc per input IIN IOZ IOFF ICC ICC VIN = 0 to 5.5 V VIN = VIH or VIL VOUT = 0 to 5.5 V VIN/VOUT = 5.5 V VIN = VCC or GND VIN/VOUT = 3.6 to 5.5 V VIH = VCC - 0.6 V VCC (V) 2.7 to 3.6 2.7 to 3.6 2.7 to 3.6 2.7 3.0 3.0 2.7 to 3.6 2.7 3.0 3.0 2.7 to 3.6 2.7 to 3.6 0 2.7 to 3.6 2.7 to 3.6 2.7 to 3.6 Min 2.0 VCC - 0.2 2.2 2.4 2.2 Max 0.8 0.2 0.4 0.4 0.55 5.0 5.0 10.0 10.0 10.0 500 A A A A V Unit Input voltage V 6 2007-10-19 TC74LCX646FS AC Characteristics (Ta = -40 to 85C) Characteristics Symbol Test Condition VCC (V) 2.7 3.3 0.3 2.7 3.3 0.3 2.7 3.3 0.3 2.7 3.3 0.3 2.7 3.3 0.3 2.7 3.3 0.3 2.7 3.3 0.3 2.7 3.3 0.3 2.7 3.3 0.3 (Note) 2.7 3.3 0.3 Min 150 1.5 1.5 1.5 1.5 1.5 3.3 3.3 2.5 2.5 1.5 1.5 Max 8.0 7.0 9.5 8.5 9.5 8.5 9.5 8.5 9.5 8.5 1.0 ns Unit Maximum clock frequency Propagation delay time (An, Bn-Bn, An) Propagation delay time (CAB, CBA-Bn, An) Propagation delay time (SAB, SBA-Bn, An) Output enable time ( OE , DIR-An, Bn) Output disable time ( OE , DIR-An, Bn) Minimum pulse width fmax tpLH tpHL tpLH tpHL tpLH tpHL tpZL tPZH tpLZ tpHZ tW (H) tW (L) ts Figure 1, Figure 2 MHz Figure 1, Figure 2 ns Figure 1, Figure 5 ns Figure 1, Figure 2 ns Figure 1, Figure 3, Figure 4 ns Figure 1, Figure 3, Figure 4 Figure 1, Figure 5 ns Minimum setup time Figure 1, Figure 5 ns Minimum hold time th tosLH tosHL Figure 1, Figure 5 ns Output to output skew ns Note: Parameter guaranteed by design. (tosLH = |tpLHm - tpLHn|, tosHL = |tpHLm - tpHLn|) Dynamic Switching Characteristics (Ta = 25C, input: tr = tf = 2.5 ns, CL = 50 pF, RL = 500 ) Characteristics Quiet output maximum dynamic VOL Quiet output minimum dynamic VOL Symbol Test Condition VIH = 3.3 V, VIL = 0 V VIH = 3.3 V, VIL = 0 V VCC (V) 3.3 3.3 Typ. Unit VOLP |VOLV| 0.8 0.8 V V Capacitive Characteristics (Ta = 25C) Characteristics Input capacitance Bus input capacitance Power dissipation capacitance Symbol CIN CI/O CPD Test Condition DIR, OE , CAB, CBA, SAB, SBA An, Bn fIN = 10 MHz (Note) VCC (V) 3.3 3.3 3.3 Typ. 7 8 25 Unit pF pF pF Note: 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) = CPDVCCfIN + ICC/8 (per bit) 7 2007-10-19 TC74LCX646FS AC Test Circuit Open 6.0 V GND Measure CL RL Switch RL Parameter tpLH, tpHL tpLZ, tpZL tpHZ, tpZH tw, ts, th, fmax Switch Open 6.0 V GND Open Output CL = 50 pF RL = 500 Figure 1 AC Waveform tr 2.5 ns Input (An, Bn, SAB, SBA) tf 2.5 ns 90% 1.5 V 10% 2.7 V GND VOH 1.5 V tpLH tpHL VOL Output (Bn, An) Figure 2 tpLH, tpHL tr 2.5 ns Output Disable ( OE ) tpLZ Output (An, Bn) Low to Off to Low tpHZ Output (An, Bn) High to Off to High Outputs enabled tf 2.5 ns 90% 1.5 V 10% tpZL 3.0 V 1.5 V VOL + 0.3 V VOH - 0.3 V tpZH VOL VOH 1.5 V GND Outputs disabled Outputs enabled 2.7 V GND Figure 3 tpLZ, tpHZ, tpZL, tpZH 8 2007-10-19 TC74LCX646FS tf 2.5 ns Input (DIR) tr 2.5 ns 90% 1.5 V 10% 2.7 V GND VOH 1.5 V tpZL Output (An) tpZH tpLZ Output (Bn) 1.5 V VOL + 0.3 V tpZL VOL VOH 1.5 V tpZH VOL tpLZ VOH - 0.3 V tpHZ VOL + 0.3 V VOL VOH VOL VOH Output (An) 1.5 V Output (Bn) tpHZ VOH - 0.3 V Figure 4 tpLZ, tpHZ, tpZL, tpZH tr 2.5 ns Input (CAB, CBA) 90% 1.5 V tf 2.5 ns 2.7 V GND 2.7 V 1.5 V ts (H) th (H) ts (L) th (L) GND VOH 1.5 V VOL 10% tW (H) Input (An, Bn) tW (L) Output (Bn, An) tpHL tpLH Figure 5 tpLH, tpHL, tw, ts, th 9 2007-10-19 TC74LCX646FS Package Dimensions Weight: 0.14 g (typ.) 10 2007-10-19 TC74LCX646FS RESTRICTIONS ON PRODUCT USE * The information contained herein is subject to change without notice. 20070701-EN GENERAL * 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. * The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA for any infringements of patents or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any patents or other rights of TOSHIBA or the third parties. * 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. 11 2007-10-19 |
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