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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 2002-01-11 TC74LCX646FS Pin Assignment (top view) IEC Logic Symbol OE DIR CBA SBA CAB SAB 21 3 23 22 1 2 CAB SAB DIR A1 A2 A3 A4 A5 A6 1 2 3 4 5 6 7 8 9 24 23 22 21 20 19 18 17 16 15 14 13 VCC CBA SBA OE G3 3EN1 [BA] 3EN2 [AB] C4 G5 C6 G7 > B1 B2 B3 B4 B5 B6 B7 A1 4 1 5 4D 20 B1 A2 A3 A4 A5 5 6 7 8 9 10 11 1 5 6D 7> 17 1 1 2 19 18 17 16 15 14 13 B2 B3 B4 B5 B6 B7 B8 A7 10 A8 11 GND 12 B8 A6 A7 A8 2 2002-01-11 TC74LCX646FS Truth Table Control Inputs OE Bus SAB X SBA X A Input Z B Input Z X Output L H L H Qn L H Input L H L H X L H 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. The data on the A bus are displayed on the B 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 B bus are displayed on the A bus. 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. DIR CAB X* CBA X* H X X X X Input X* X* L X L H L X* L X H X* X* H X X L X* H X H Output X* X* X L L H L X* X L H X* X* X H Qn L X* X H H L H L L 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 2002-01-11 TC74LCX646FS System Diagram 21 OE DIR 3 A1 4 D CK Q BA fA BB 20 Q D CK B1 fB A8 CAB SAB 11 1 2 fA Same as above block 13 23 fB B8 CBA SBA 22 BA BB 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 2002-01-11 TC74LCX646FS Maximum Ratings 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) Unit V V DC bus I/O voltage VI/O -0.5 to VCC + 0.5 V (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 mA (Note 4) mA mA mW mA C 180 100 -65 to 150 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 Recommended Operating Conditions 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 Unit V (Note 5) V (Note 6) (Note 7) (Note 8) (Note 9) C (Note 10) ns/V mA VIN VI/O V Output current Operating temperature Input rise and fall time IOH/IOL Topr dt/dv 0 to 10 Note 5: Data retention only Note 6: Output in OFF state Note 7: High or low state Note 8: VCC = 3.0 to 3.6 V Note 9: VCC = 2.7 to 3.0 V Note 10: VIN = 0.8 to 2.0 V, VCC = 3.0 V 5 2002-01-11 TC74LCX646FS Electrical Characteristics DC Characteristics (Ta = -40 to 85C) Characteristics H-level L-level Symbol VIH VIL Test Condition VCC (V) Input voltage 3/4 3/4 Min 2.7 to 3.6 2.7 to 3.6 2.0 3/4 Max 3/4 Unit V 0.8 3/4 3/4 3/4 3/4 IOH = -100 mA H-level VOH VIN = VIH or VIL IOH = -12 mA IOH = -18 mA Output voltage IOH = -24 mA IOL = 100 mA 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 DICC 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 VCC - 0.2 2.2 2.4 2.2 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 V 0.2 0.4 0.4 0.55 5.0 5.0 mA mA mA 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 10.0 10.0 10.0 mA 500 6 2002-01-11 TC74LCX646FS AC Characteristics (Ta = -40 to 85C) Characteristics Symbol Test Condition VCC (V) 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) Minimum setup time ts Figure 1, Figure 5 Figure 1, Figure 5 Figure 1, Figure 3, Figure 4 Figure 1, Figure 2 Figure 1, Figure 5 Figure 1, Figure 2 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 10) 2.7 3.3 0.3 3/4 3/4 3/4 Min Max Unit MHz 150 3/4 Figure 1, Figure 2 8.0 7.0 9.5 8.5 9.5 8.5 9.5 ns 1.5 3/4 ns 1.5 3/4 ns 1.5 3/4 ns 8.5 9.5 8.5 3/4 3/4 3/4 3/4 3/4 3/4 3/4 1.5 3/4 Figure 1, Figure 3, Figure 4 ns 1.5 3.3 3.3 2.5 2.5 1.5 1.5 3/4 3/4 ns ns Minimum hold time th tosLH tosHL Figure 1, Figure 5 ns Output to output skew ns 1.0 Note 10: 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 W) Characteristics Quiet output maximum dynamic VOL Quiet output minimum dynamic VOL Symbol Test Condition VCC (V) VOLP |VOLV| VIH = 3.3 V, VIL = 0 V VIH = 3.3 V, VIL = 0 V 3.3 3.3 0.8 0.8 V V Typ. Unit Capacitive Characteristics (Ta = 25C) Characteristics Input capacitance Bus input capacitance Power dissipation capacitance Symbol CIN CI/O CPD Test Condition VCC (V) DIR, OE , CAB, CBA, SAB, SBA An, Bn fIN = 10 MHz (Note 11) 3.3 3.3 3.3 7 8 25 pF pF pF Typ. Unit Note 11: 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 2002-01-11 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 W 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 Output (Bn, An) tpLH VOH 1.5 V tpHL VOL Figure 2 tpLH, tpHL tr 2.5 ns Output Disable ( OE ) tpLZ Output (An, Bn) Low to Off to Low tpHZ tf 2.5 ns 90% 1.5 V 10% tpZL 3.0 V 1.5 V VOL + 0.3 V VOH - 0.3 V 1.5 V GND tpZH VOL VOH 2.7 V GND Output (An, Bn) High to Off to High Outputs enabled Outputs disabled Outputs enabled Figure 3 tpLZ, tpHZ, tpZL, tpZH 8 2002-01-11 TC74LCX646FS tf 2.5 ns Input (DIR) tr 2.5 ns 90% 1.5 V 10% 2.7 V GND Output (An) tpZL VOH 1.5 V tpLZ VOH - 0.3 V 1.5 V tpZH tpLZ tpHZ VOL VOH 1.5 V VOL + 0.3 V tpZL VOH - 0.3 V 1.5 V VOL tpZH VOL VOH VOL + 0.3 V VOL VOH Output (An) Output (Bn) Output (Bn) tpHZ Figure 4 tpLZ, tpHZ, tpZL, tpZH tr 2.5 ns Input (CAB, CBA) 90% 1.5 V 10% tf 2.5 ns 2.7 V tW (H) tW (L) GND 2.7 V Input (An, Bn) 1.5 V ts (H) th (H) ts (L) th (L) GND Output (Bn, An) tpHL VOH 1.5 V tpLH VOL Figure 5 tpLH, tpHL, tw, ts, th 9 2002-01-11 TC74LCX646FS Package Dimensions Weight: 0.14 g (typ.) 10 2002-01-11 TC74LCX646FS 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. 11 2002-01-11 |
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