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 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 GND 12 13 B8 A4 A5 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 2007-10-19 TC74LCX646FS Truth Table Control Inputs OE H DIR CAB CBA SAB SBA X* X* X X X X X X* L X* L X X* L X X* H X H X* X* X* X* X* L Bus H X X L X L X H X H L X* X* X* A B 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 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. 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 3 DIR A1 φA 4 D Q φA CK φB Q φB 20 D B1 CK A8 CAB SAB 11 13 Same as above block 23 1 2 φA 22 φB φA B8 CBA SBA φB 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 2007-10-19 TC74LCX646FS Absolute Maximum Ratings (Note 1) 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 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) Symbol Rating 2.0 to 3.6 VCC 1.5 to 3.6 VIN Bus I/O voltage VI/O Output current IOH/IOL Unit (Note 2) 0 to 5.5 V 0 to 5.5 (Note 3) 0 to VCC (Note 4) ±24 (Note 5) ±12 (Note 6) Operating temperature Topr −40 to 85 Input rise and fall time dt/dv 0 to 10 V V mA °C (Note 7) 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 85°C) Characteristics Input voltage Symbol Test Condition H-level VIH ⎯ L-level VIL ⎯ 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 Increase in Icc per input ΔICC L-level Min Max 2.7 to 3.6 2.0 ⎯ 2.7 to 3.6 ⎯ 0.8 IOH = −100 μA 2.7 to 3.6 VCC − 0.2 ⎯ IOH = −12 mA 2.7 2.2 ⎯ IOH = −18 mA 3.0 2.4 ⎯ IOH = −24 mA 3.0 2.2 ⎯ IOL = 100 μA 2.7 to 3.6 ⎯ 0.2 IOL = 12 mA 2.7 ⎯ 0.4 IOL = 16 mA 3.0 ⎯ 0.4 IOL = 24 mA VCC (V) Unit V V 3.0 ⎯ 0.55 2.7 to 3.6 ⎯ ±5.0 μA 2.7 to 3.6 ⎯ ±5.0 μA VIN/VOUT = 5.5 V 0 ⎯ 10.0 μA VIN = VCC or GND 2.7 to 3.6 ⎯ 10.0 VIN/VOUT = 3.6 to 5.5 V 2.7 to 3.6 ⎯ ±10.0 VIH = VCC − 0.6 V 2.7 to 3.6 ⎯ 500 VIN = VIH or VIL VOUT = 0 to 5.5 V 6 μA 2007-10-19 TC74LCX646FS AC Characteristics (Ta = −40 to 85°C) Characteristics 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 Symbol fmax tpLH tpHL tpLH tpHL tpLH tpHL tpZL tPZH tpLZ tpHZ tW (H) tW (L) Test Condition Figure 1, Figure 2 Figure 1, Figure 2 Figure 1, Figure 5 Figure 1, Figure 2 Figure 1, Figure 3, Figure 4 Figure 1, Figure 3, Figure 4 Figure 1, Figure 5 Minimum setup time ts Figure 1, Figure 5 Minimum hold time th Figure 1, Figure 5 Output to output skew Note: tosLH (Note) tosHL Min Max 2.7 ⎯ ⎯ 3.3 ± 0.3 150 ⎯ VCC (V) 2.7 ⎯ 8.0 3.3 ± 0.3 1.5 7.0 2.7 ⎯ 9.5 3.3 ± 0.3 1.5 8.5 2.7 ⎯ 9.5 3.3 ± 0.3 1.5 8.5 2.7 ⎯ 9.5 3.3 ± 0.3 1.5 8.5 2.7 ⎯ 9.5 3.3 ± 0.3 1.5 8.5 2.7 3.3 ⎯ 3.3 ± 0.3 3.3 ⎯ 2.7 2.5 ⎯ 3.3 ± 0.3 2.5 ⎯ 2.7 1.5 ⎯ 3.3 ± 0.3 1.5 ⎯ 2.7 ⎯ ⎯ 3.3 ± 0.3 ⎯ 1.0 Unit MHz ns ns ns ns ns ns ns ns ns 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 Ω) Characteristics Symbol Test Condition VCC (V) Typ. Unit 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: (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) = CPD･VCC･fIN + ICC/8 (per bit) 7 2007-10-19 TC74LCX646FS AC Test Circuit RL Switch RL Measure CL Output Open 6.0 V GND CL = 50 pF RL = 500 Ω Parameter Switch tpLH, tpHL Open tpLZ, tpZL 6.0 V tpHZ, tpZH GND tw, ts, th, fmax Open 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 tpLH VOL tpHL Figure 2 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 VOH − 0.3 V Output (An, Bn) High to Off to High VOL tpZH VOH 1.5 V GND Outputs enabled Outputs disabled Outputs enabled Figure 3 tpLZ, tpHZ, tpZL, tpZH 8 2007-10-19 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 Output (An) tpLZ VOH − 0.3 V 1.5 V tpZH VOH VOL tpHZ tpLZ Output (Bn) VOL VOH 1.5 V VOL + 0.3 V Output (Bn) tpHZ VOL tpZL VOH VOH − 0.3 V 1.5 V VOL tpZH Figure 4 tpLZ, tpHZ, tpZL, tpZH tr 2.5 ns Input (CAB, CBA) 10% tf 2.5 ns 2.7 V 90% 1.5 V 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 2007-10-19 TC74LCX646FS Package Dimensions Weight: 0.14 g (typ.) 10 2007-10-19 TC74LCX646FS RESTRICTIONS ON PRODUCT USE 20070701-EN GENERAL • 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. 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Toshiba assumes no liability for damage or losses occurring as a result of noncompliance with applicable laws and regulations. 11 2007-10-19