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 CAB 1 24 VCC SAB 2 23 CBA DIR 3 22 SBA A1 4 21 OE A2 5 20 B1 OE DIR CBA SBA CAB SAB A1 A3 6 19 B2 A4 7 18 B3 A5 8 17 B4 A2 A6 9 16 B5 A3 A7 10 15 B6 A8 11 14 B7 A4 A5 GND 12 13 B8 A6 A7 A8 2 21 3 23 22 1 2 4 5 G3 3EN1 [BA] 3EN2 [AB] C4 G5 C6 G7 > 1 5 1 5 6D 7 > 1 7 4D 1 1 2 20 19 6 18 7 17 8 16 9 15 10 14 11 13 B1 B2 B3 B4 B5 B6 B7 B8 2002-01-11 TC74LCX646FS Truth Table Control Inputs OE H DIR Bus CAB CBA SAB SBA X* X* X X X* X* X* L L X X Input Input Z Z X X Input Output L L H H L L H H X Qn L L H H Output Input L L H H L L H H Qn X L L H H X H X* X* X* X* X* X* L B X X L Function A H H X X X X L L L X* X* X* X H X H 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. 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 3 DIR A1 BA 4 D Q fA CK BB 20 Q fB D B1 CK A8 CAB SAB 11 13 Same as above block 1 23 2 fA 22 fB BA B8 CBA SBA BB Timing Chart OE DIR SAB SBA CAB CBA A B A: Input B: Output : Don’t care A: Output B: Input A: Z B: Z Z: High impedance 4 2002-01-11 TC74LCX646FS Maximum Ratings Characteristics Power supply voltage DC input voltage (DIR, OE , CAB, CBA, SAB, SBA) Symbol Rating Unit VCC -0.5 to 7.0 V VIN -0.5 to 7.0 V -0.5 to 7.0 (Note 2) DC bus I/O voltage VI/O -0.5 to VCC + 0.5 V (Note 3) Input diode current IIK -50 Output diode current IOK ±50 DC output current IOUT ±50 mA Power dissipation PD 180 mW ICC/IGND ±100 mA Tstg -65 to 150 °C DC VCC/ground current Storage temperature mA (Note 4) mA 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 Output current Symbol Rating Unit 2.0 to 3.6 VCC 1.5 to 3.6 VIN V (Note 5) 0 to 5.5 VI/O IOH/IOL V 0 to 5.5 (Note 6) 0 to VCC (Note 7) ±24 (Note 8) ±12 (Note 9) Operating temperature Topr -40 to 85 Input rise and fall time dt/dv 0 to 10 V mA °C (Note 10) ns/V 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 85°C) Characteristics Symbol Test Condition Min Max Unit VCC (V) Input voltage H-level VIH ¾ 2.7 to 3.6 2.0 ¾ L-level VIL ¾ 2.7 to 3.6 ¾ 0.8 IOH = -100 mA 2.7 to 3.6 VCC - 0.2 ¾ IOH = -12 mA 2.7 2.2 ¾ IOH = -18 mA 3.0 2.4 ¾ IOH = -24 mA 3.0 2.2 ¾ IOL = 100 mA 2.7 to 3.6 ¾ 0.2 IOL = 12 mA 2.7 ¾ 0.4 IOL = 16 mA 3.0 ¾ 0.4 H-level VOH VIN = VIH or VIL Output voltage VOL VIN = VIH or VIL Input leakage current IIN VIN = 0 to 5.5 V 3-state output OFF state current IOZ Power-off leakage current IOFF Quiescent supply current ICC L-level IOL = 24 mA Increase in Icc per input DICC V V 3.0 ¾ 0.55 2.7 to 3.6 ¾ ±5.0 mA 2.7 to 3.6 ¾ ±5.0 mA VIN/VOUT = 5.5 V 0 ¾ 10.0 mA VIN = VCC or GND 2.7 to 3.6 ¾ 10.0 VIN/VOUT = 3.6 to 5.5 V 2.7 to 3.6 ¾ ±10.0 VIH = VCC - 0.6 V 2.7 to 3.6 ¾ 500 VIN = VIH or VIL VOUT = 0 to 5.5 V 6 mA 2002-01-11 TC74LCX646FS AC Characteristics (Ta = -40 to 85°C) Characteristics Symbol Test Condition Min Max 2.7 ¾ ¾ 3.3 ± 0.3 150 ¾ Unit 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 Figure 1, Figure 2 Figure 1, Figure 2 tpHL tpLH Figure 1, Figure 5 tpHL tpLH Figure 1, Figure 2 tpHL tpZL tPZH tpLZ Figure 1, Figure 3, Figure 4 Figure 1, Figure 3, Figure 4 tpHZ tW (H) Figure 1, Figure 5 tW (L) Minimum setup time Minimum hold time Output to output skew ts Figure 1, Figure 5 th Figure 1, Figure 5 tosLH (Note 10) tosHL 2.7 ¾ 8.0 3.3 ± 0.3 1.5 7.0 2.7 ¾ 9.5 3.3 ± 0.3 1.5 8.5 2.7 ¾ 9.5 3.3 ± 0.3 1.5 8.5 2.7 ¾ 9.5 3.3 ± 0.3 1.5 8.5 2.7 ¾ 9.5 3.3 ± 0.3 1.5 8.5 2.7 3.3 ¾ 3.3 ± 0.3 3.3 ¾ 2.7 2.5 ¾ 3.3 ± 0.3 2.5 ¾ 2.7 1.5 ¾ 3.3 ± 0.3 1.5 ¾ 2.7 ¾ ¾ 3.3 ± 0.3 ¾ 1.0 MHz ns ns ns ns ns ns ns ns ns Note 10: Parameter guaranteed by design. (tosLH = |tpLHm - tpLHn|, tosHL = |tpHLm - tpHLn|) Dynamic Switching Characteristics (Ta = 25°C, input: tr = tf = 2.5 ns, CL = 50 pF, RL = 500 W) Characteristics Symbol Test Condition Typ. Unit VCC (V) Quiet output maximum dynamic VOL VOLP VIH = 3.3 V, VIL = 0 V 3.3 0.8 V Quiet output minimum dynamic VOL |VOLV| VIH = 3.3 V, VIL = 0 V 3.3 0.8 V Typ. Unit Capacitive Characteristics (Ta = 25°C) Characteristics Symbol Test Condition VCC (V) Input capacitance CIN DIR, OE , CAB, CBA, SAB, SBA 3.3 7 pF Bus input capacitance CI/O An, Bn 3.3 8 pF Power dissipation capacitance CPD fIN = 10 MHz 3.3 25 pF (Note 11) 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) = CPD･VCC･fIN + ICC/8 (per bit) 7 2002-01-11 TC74LCX646FS AC Test Circuit RL Switch Parameter Switch tpLH, tpHL Open tpLZ, tpZL 6.0 V tpHZ, tpZH GND tw, ts, th, fmax Open RL Measure CL Output Open 6.0 V GND CL = 50 pF RL = 500 W Figure 1 AC Waveform tr 2.5 ns tf 2.5 ns 2.7 V 90% 1.5 V Input (An, Bn, SAB, SBA) 10% GND VOH Output (Bn, An) 1.5 V Figure 2 VOL tpHL tpLH tpLH, tpHL tr 2.5 ns tf 2.5 ns 2.7 V 90% 1.5 V Output Disable ( OE ) 10% tpLZ GND tpZL 3.0 V Output (An, Bn) Low to Off to Low 1.5 V tpHZ VOL + 0.3 V VOL tpZH VOH VOH - 0.3 V Output (An, Bn) High to Off to High 1.5 V GND Outputs enabled Figure 3 Outputs disabled Outputs enabled tpLZ, tpHZ, tpZL, tpZH 8 2002-01-11 TC74LCX646FS tf 2.5 ns tr 2.5 ns 2.7 V 90% 1.5 V 10% Input (DIR) GND VOH Output (An) 1.5 V VOL + 0.3 V tpZL tpLZ VOH - 0.3 V Output (An) VOL VOH 1.5 V tpZH VOL tpHZ tpLZ Output (Bn) VOH 1.5 V VOL + 0.3 V VOL tpZL Output (Bn) tpHZ VOH VOH - 0.3 V 1.5 V VOL tpZH Figure 4 tr 2.5 ns Input (CAB, CBA) tpLZ, tpHZ, tpZL, tpZH tf 2.5 ns 2.7 V 90% 1.5 V 10% tW (H) tW (L) GND 2.7 V Input (An, Bn) 1.5 V ts (H) th (H) ts (L) th (L) GND VOH Output (Bn, An) 1.5 V tpHL VOL tpLH 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