Revised March 2001 74LCX821 Low Voltage 10-Bit D-Type Flip-Flop with 5V Tolerant Inputs and Outputs General Description Features The LCX821 consists of ten D-type Flip-Flops with 3-STATE outputs for bus organized system applications. The device is designed for low voltage (2.5V or 3.3V) VCC applications with capability of interfacing to a 5V signal environment. ■ 5V tolerant inputs and outputs The LCX821 is fabricated with an advanced CMOS technology to achieve high speed operation while maintaining CMOS low power dissipation. ■ Supports live insertion/withdrawal (Note 1) ■ 2.3V–3.6V VCC specifications provided ■ 7.0 ns tPD max (VCC = 3.3V), 10 µA ICC max ■ Power-down high impedance inputs and outputs ■ ±24 mA output drive (VCC = 3.0V) ■ Implements patented noise/EMI reduction circuitry ■ Latch-up performance exceeds 500 mA ■ ESD performance: Human Body Model > 2000V Machine Model > 200V Note 1: To ensure the high-impedance state during power up or down, OE should be tied to VCC through a pull-up resistor: the minimum value or the resistor is determined by the current-sourcing capability of the driver. Ordering Code: Order Number Package Number Package Description 74LCX821WM M24B 24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 74LCX821MSA MSA24 24-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide 74LCX821MTC MTC24 24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Devices also available in Tape and Reel. Specify by appending the suffix “X” to the ordering code. Logic Symbols Connection Diagram IEEE/IEC © 2001 Fairchild Semiconductor Corporation DS012635 www.fairchildsemi.com 74LCX821 Low Voltage 10-Bit D-Type Flip-Flop with 5V Tolerant Inputs and Outputs January 1996 74LCX821 Pin Descriptions Pin Names Function Table Description Inputs Internal Outputs OE CLK D Q On L NC Z Hold H NC Z Hold Load Function D0–D9 Data Inputs CLK Clock Input H H OE Output Enable Input H H O0–O9 3-STATE Latch Outputs H H L L L L Z H H Z Load L L L Data Available H H H Data Available L H L NC NC No Change in Data L H H NC NC No Change in Data H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = High Impendance = LOW-to-HIGH Transition NC = No Change Functional Description requirements on the LOW-to-HIGH Clock (CLK) transition. With the Output Enable (OE) LOW, the contents of the ten flip-flops are available at the outputs. When OE is HIGH, the outputs go to the high impedance state. Operation of the OE input does not affect the state of the flip-flops. The LCX821 consists of ten edge-triggered flip-flops with individual D-type inputs with 3-STATE true outputs. The buffered clock and buffered Output Enable are common to all flip-flops. The ten flip-flops will store the state of their individual D inputs that meet the setup and hold time Logic Diagram Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. www.fairchildsemi.com 2 Symbol Parameter Value VCC Supply Voltage −0.5 to +7.0 VI DC Input Voltage −0.5 to +7.0 VO DC Output Voltage −0.5 to +7.0 Conditions Units V V Output in 3-STATE −0.5 to VCC + 0.5 Output in HIGH or LOW State (Note 3) IIK DC Input Diode Current −50 VI < GND IOK DC Output Diode Current −50 VO < GND +50 VO > VCC V mA mA IO DC Output Source/Sink Current ±50 mA ICC DC Supply Current per Supply Pin ±100 mA IGND DC Ground Current per Ground Pin ±100 mA TSTG Storage Temperature −65 to +150 °C Recommended Operating Conditions (Note 4) Symbol VCC Parameter Supply Voltage VI Input Voltage VO Output Voltage IOH/IOL Output Current TA Free-Air Operating Temperature ∆t/∆V Input Edge Rate, VIN = 0.8V − 2.0V, VCC = 3.0V Min Max Operating 2.0 3.6 Data Retention 1.5 3.6 0 5.5 HIGH or LOW State 0 VCC 3-STATE 0 5.5 VCC = 3.0V − 3.6V ±24 VCC = 2.7V − 3.0V ±12 VCC = 2.3V − 2.7V ±8 Units V V V mA −40 85 °C 0 10 ns/V Note 2: The Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the Absolute Maximum Ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation. Note 3: IO Absolute Maximum Rating must be observed. Note 4: Unused inputs must be held HIGH or LOW. They may not float. DC Electrical Characteristics Symbol VIH VIL VOH VOL Parameter Conditions HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Voltage LOW Level Output Voltage IOH = −100 µA VCC TA = −40°C to +85°C (V) Min 2.3 − 2.7 1.7 2.7 − 3.6 2.0 Max V 2.3 − 2.7 0.7 2.7 − 3.6 0.8 2.3 − 3.6 VCC − 0.2 IOH = −8 mA 2.3 1.8 IOH = −12 mA 2.7 2.2 IOH = −18 mA 3.0 2.4 IOH = −24 mA 3.0 2.2 IOL = 100 µA 2.3 − 3.6 Units V V 0.2 IOL = 8 mA 2.3 0.6 IOL = 12 mA 2.7 0.4 IOL = 16 mA 3.0 0.4 V IOL = 24 mA 3.0 0.55 II Input Leakage Current 0 ≤ VI ≤ 5.5V 2.3 − 3.6 ±5.0 µA IOZ 3-STATE Output Leakage 0 ≤ VO ≤ 5.5V 2.3 − 3.6 ±5.0 µA 0 10 µA VI = V IH or VIL IOFF Power-Off Leakage Current VI or VO = 5.5V 3 www.fairchildsemi.com 74LCX821 Absolute Maximum Ratings(Note 2) 74LCX821 DC Electrical Characteristics Symbol (Continued) Parameter VCC Conditions (V) ICC ∆ICC Quiescent Supply Current Increase in ICC per Input TA = −40°C to +85°C Min Units Max VI = VCC or GND 2.3 − 3.6 10 3.6V ≤ VI, VO ≤ 5.5V (Note 5) 2.3 − 3.6 ±10 VIH = VCC − 0.6V 2.3 − 3.6 500 µA µA Note 5: Outputs disabled or 3-STATE only. AC Electrical Characteristics TA = −40°C to +85°C, RL = 500Ω Symbol Parameter VCC = 3.3V ± 0.3V VCC = 2.7V VCC = 2.5V ± 0.2V CL = 50 pF CL = 50 pF CL = 30 pF Min Max Min Max Min Max 1.5 7.0 1.5 7.5 1.5 8.4 CLK to On 1.5 7.0 1.5 7.5 1.5 8.4 Output Enable Time 1.5 7.5 1.5 8.0 1.5 9.8 1.5 7.5 1.5 8.0 1.5 9.8 1.5 6.5 1.5 7.0 1.5 7.8 1.5 6.5 1.5 7.0 1.5 7.8 fMAX Maximum Clock Frequency 150 tPHL Propagation Delay tPLH tPZL tPZH tPLZ Output Disable Time tPHZ Units MHz tOSHL Output to Output Skew 1.0 tOSLH (Note 6) 1.0 ns ns ns ns tS Setup Time, Dn to CLK 2.5 2.5 4.0 ns tH Hold Time, Dn to CLK 1.5 1.5 2.0 ns tW CLK Pulse Width 3.3 3.3 4.0 ns Note 6: Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. The specification applies to any outputs switching in the same direction, either HIGH-to-LOW (tOSHL) or LOW-to-HIGH (tOSLH). Dynamic Switching Characteristics Symbol VOLP VOLV VCC TA = 25°C (V) Typical CL = 50 pF, VIH = 3.3V, VIL = 0V 3.3 0.8 CL = 30 pF, VIH = 2.5V, VIL = 0V 2.5 0.6 CL = 50 pF, VIH = 3.3V, VIL = 0V 3.3 −0.8 CL = 30 pF, VIH = 2.5V, VIL = 0V 2.5 −0.6 Parameter Quiet Output Dynamic Peak VOL Quiet Output Dynamic Valley VOL Conditions Units V V Capacitance Typical Units CIN Symbol Input Capacitance Parameter VCC = Open, VI = 0V or VCC 7 pF CO Output Capacitance VCC = 3.3V, VI = 0V or VCC 8 pF CPD Power Dissipation Capacitance VCC = 3.3V, VI = 0V or VCC, f = 10 MHz 20 pF www.fairchildsemi.com Conditions 4 74LCX821 AC LOADING and WAVEFORMS Generic for LCX Family FIGURE 1. AC Test Circuit (CL includes probe and jig capacitance) Test Switch tPLH, tPHL Open tPZL, tPLZ 6V at VCC = 3.3 ± 0.3V VCC x 2 at VCC = 2.5 ± 0.2V tPZH,tPHZ GND Waveform for Inverting and Non-Inverting Functions 3-STATE Output High Enable and Disable Times for Logic Propagation Delay. Pulse Width and trec Waveforms Setup Time, Hold Time and Recovery Time for Logic trise and tfall 3-STATE Output Low Enable and Disable Times for Logic FIGURE 2. Waveforms (Input Characteristics; f =1MHz, tr = tf = 3ns) Symbol VCC 3.3V ± 0.3V 2.7V 2.5V ± 0.2V Vmi 1.5V 1.5V VCC/2 Vmo 1.5V 1.5V VCC/2 Vx VOL + 0.3V VOL + 0.3V VOL + 0.15V Vy VOH − 0.3V VOH − 0.3V VOH − 0.15V 5 www.fairchildsemi.com 74LCX821 Schematic Diagram Generic for LCX Family www.fairchildsemi.com 6 74LCX821 Physical Dimensions inches (millimeters) unless otherwise noted 24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide Package Number M24B 24-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide Package Number MSA24 7 www.fairchildsemi.com 74LCX821 Low Voltage 10-Bit D-Type Flip-Flop with 5V Tolerant Inputs and Outputs Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Package Number MTC24 Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. www.fairchildsemi.com www.fairchildsemi.com 8