[ /Title (CD74 HC126 , CD74 HCT12 6) /Subject (High Speed CMOS Logic Quad Buffer, ThreeState) CD54HC126, CD74HC126, CD54HCT126, CD74HCT126 Data sheet acquired from Harris Semiconductor SCHS144C High-Speed CMOS Logic Quad Buffer, Three-State November 1997 - Revised September 2003 Features Description • Three-State Outputs • Separate Output Enable Inputs The ’HC126 and ’HCT126 contain four independent threestate buffers, each having its own output enable input, which when “low” puts the output in the high-impedance state. • Fanout (Over Temperature Range) - Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads - Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads Ordering Information • Wide Operating Temperature Range . . . -55oC to 125oC PART NUMBER • Balanced Propagation Delay and Transition Times TEMP. RANGE (oC) PACKAGE CD54HC126F3A -55 to 125 14 Ld CERDIP CD54HCT126F3A -55 to 125 14 Ld CERDIP • HC Types - 2V to 6V Operation - High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V CD74HC126E -55 to 125 14 Ld PDIP CD74HC126M -55 to 125 14 Ld SOIC CD74HC126MT -55 to 125 14 Ld SOIC • HCT Types - 4.5V to 5.5V Operation - Direct LSTTL Input Logic Compatibility, VIL= 0.8V (Max), VIH = 2V (Min) - CMOS Input Compatibility, Il ≤ 1µA at VOL, VOH CD74HC126M96 -55 to 125 14 Ld SOIC CD74HCT126E -55 to 125 14 Ld PDIP CD74HCT126M -55 to 125 14 Ld SOIC CD74HCT126MT -55 to 125 14 Ld SOIC CD74HCT126M96 -55 to 125 14 Ld SOIC • Significant Power Reduction Compared to LSTTL Logic ICs NOTE: When ordering, use the entire part number. The suffix 96 denotes tape and reel. The suffix T denotes a small-quantity reel of 250. Pinout CD54HC126, CD54HC126 (CERDIP) CD74HC126, CD74HC126 (PDIP, SOIC) TOP VIEW 1OE 1 14 VCC 1A 2 13 4OE 1Y 3 12 4A 2OE 4 11 4Y 2A 5 10 3OE 2Y 6 9 3A GND 7 8 3Y CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures. Copyright © 2003, Texas Instruments Incorporated 1 CD54HC126, CD74HC126, CD54HCT126, CD74HCT126 Functional Diagram 1OE 1A 2OE 1 3 2 1Y 4 6 5 2A 2Y 10 3OE 8 9 3Y 3A 13 4OE 11 12 4Y GND = 7 VCC = 14 4A TRUTH TABLE INPUTS OUTPUTS nA nOE nY H H H L H L X L Z H= High Voltage Level L= Low Voltage Level X= Don’t Care Z= High Impedance, OFF State Logic Diagram P nA nY n nOE 2 CD54HC126, CD74HC126, CD54HCT126, CD74HCT126 Absolute Maximum Ratings Thermal Information DC Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to 7V DC Input Diode Current, IIK For VI < -0.5V or VI > VCC + 0.5V . . . . . . . . . . . . . . . . . . . . . .±20mA DC Output Diode Current, IOK For VO < -0.5V or VO > VCC + 0.5V . . . . . . . . . . . . . . . . . . . .±20mA DC Drain Current, per Output, IO For -0.5V < VO < VCC + 0.5V. . . . . . . . . . . . . . . . . . . . . . . . . .±35mA DC Output Source or Sink Current per Output Pin, IO For VO > -0.5V or VO < VCC + 0.5V . . . . . . . . . . . . . . . . . . . .±25mA DC VCC or Ground Current, ICC . . . . . . . . . . . . . . . . . . . . . . . . .±70mA Thermal Resistance (Typical, Note 1) θJA (oC/W) E (PDIP) Package . . . . . . . . . . . . . . . . . . . . . . . . . . 80 M (SOIC) Package. . . . . . . . . . . . . . . . . . . . . . . . . . 86 Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . 150oC Maximum Storage Temperature Range . . . . . . . . . .-65oC to 150oC Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300oC (SOIC - Lead Tips Only) Operating Conditions Temperature Range (TA) . . . . . . . . . . . . . . . . . . . . . -55oC to 125oC Supply Voltage Range, VCC HC Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2V to 6V HCT Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.5V to 5.5V DC Input or Output Voltage, VI, VO . . . . . . . . . . . . . . . . . 0V to VCC Input Rise and Fall Time 2V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000ns (Max) 4.5V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500ns (Max) 6V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400ns (Max) CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. NOTE: 1. The package thermal impedance is calculated in accordance with JESD 51-7. DC Electrical Specifications TEST CONDITIONS PARAMETER SYMBOL VI (V) VIH - 25oC IO (mA) VCC (V) -40oC TO 85oC -55oC TO 125oC MIN TYP MAX MIN MAX MIN MAX UNITS 2 1.5 - - 1.5 - 1.5 - V 4.5 3.15 - - 3.15 - 3.15 - V 6 4.2 - - 4.2 - 4.2 - V 2 - - 0.5 - 0.5 - 0.5 V 4.5 - - 1.35 - 1.35 - 1.35 V 6 - - 1.8 - 1.8 - 1.8 V -0.02 2 1.9 - - 1.9 - 1.9 - V -0.02 4.5 4.4 - - 4.4 - 4.4 - V -0.02 6 5.9 - - 5.9 - 5.9 - V -6 4.5 3.98 - - 3.84 - 3.7 - V -7.8 6 5.48 - - 5.34 - 5.2 - V 0.02 2 - - 0.1 - 0.1 - 0.1 V 0.02 4.5 - - 0.1 - 0.1 - 0.1 V 0.02 6 - - 0.1 - 0.1 - 0.1 V 6 4.5 - - 0.26 - 0.33 - 0.4 V 7.8 6 - - 0.26 - 0.33 - 0.4 V - 6 - - ±0.1 - ±1 - ±1 µA HC TYPES High Level Input Voltage Low Level Input Voltage High Level Output Voltage CMOS Loads VIL VOH - VIH or VIL High Level Output Voltage TTL Loads Low Level Output Voltage CMOS Loads VOL VIH or VIL Low Level Output Voltage TTL Loads Input Leakage Current II VCC or GND - - 3 CD54HC126, CD74HC126, CD54HCT126, CD74HCT126 DC Electrical Specifications (Continued) TEST CONDITIONS SYMBOL VI (V) Quiescent Device Current ICC VCC or GND 0 Three-State Leakage Current IOZ VIL or VIH High Level Input Voltage VIH Low Level Input Voltage High Level Output Voltage CMOS Loads PARAMETER 25oC IO (mA) VCC (V) -40oC TO 85oC -55oC TO 125oC MIN TYP MAX MIN MAX MIN MAX UNITS 6 - - 8 - 80 - 160 µA - 6 - - ±0.5 - ±5 - ±10 µA - - 4.5 to 5.5 2 - - 2 - 2 - V VIL - - 4.5 to 5.5 - - 0.8 - 0.8 - 0.8 V VOH VIH or VIL -0.02 4.5 4.4 - - 4.4 - 4.4 - V -6 4.5 3.98 - - 3.84 - 3.7 - V 0.02 4.5 - - 0.1 - 0.1 - 0.1 V 6 4.5 - - 0.26 - 0.33 - 0.4 V HCT TYPES High Level Output Voltage TTL Loads Low Level Output Voltage CMOS Loads VOL VIH or VIL Low Level Output Voltage TTL Loads II VCC to GND 0 5.5 - - ±0.1 - ±1 - ±1 µA ICC VCC or GND 0 5.5 - - 8 - 80 - 160 µA Additional Quiescent Device Current Per Input Pin: 1 Unit Load ∆ICC (Note 2) VCC -2.1 - 4.5 to 5.5 - 100 360 - 450 - 490 µA Three-State Leakage Current IOZ VIL or VIH - 5.5 - - ±0.5 - ±5 - ±10 µA Input Leakage Current Quiescent Device Current NOTE: 2. For dual-supply systems theoretical worst case (VI = 2.4V, VCC = 5.5V) specification is 1.8mA. HCT Input Loading Table INPUT UNIT LOADS nA, nOE 1 NOTE: Unit Load is ∆ICC limit specified in DC Electrical Specifications table, e.g., 360µA max at 25oC. 4 CD54HC126, CD74HC126, CD54HCT126, CD74HCT126 Switching Specifications PARAMETER Input tr, tf = 6ns SYMBOL TEST CONDITIONS tPLH, tPHL CL = 50pF 25oC -40oC TO 85oC -55oC TO 125oC VCC (V) TYP MAX MAX MAX UNITS 2 - 100 125 150 ns 4.5 - 20 25 30 ns CL = 15pF 5 8 - - - ns CL = 50pF 6 - 17 21 36 ns CL = 50pF 2 - 125 155 190 ns 4.5 - 25 31 38 ns CL = 15pF 5 10 - - - ns CL = 50pF 6 - 21 26 32 ns CL = 50pF 2 - 125 155 190 ns CL = 50pF 4.5 - 25 31 38 ns CL = 15pF 5 10 - - - ns CL = 50pF 6 - 21 26 32 ns CL = 50pF 2 - 60 75 90 ns 4.5 - 12 15 18 ns 6 - 10 13 15 ns HC TYPES Propagation Delay Data to Outputs Enable Delay Time Disabling Delay Time Output Transition Times tPZL, tPZH tPLZ, tPHZ tTLH, tTHL Input Capacitance CI - - - 10 10 10 pF Three-State Output Capacitance CO - - - 20 20 20 pF Power Dissipation Capacitance (Notes 3, 4) CPD - 5 30 - - - pF CL = 50pF 4.5 - 24 30 36 ns CL = 15pF 5 9 - - - ns CL = 50pF 4.5 - 25 31 38 ns CL = 15pF 5 10 - - - ns CL = 50pF 4.5 - 28 35 42 ns CL = 15pF 5 11 - - - ns CL = 50pF 4.5 - 12 15 18 ns HCT TYPES Propagation Delay Time to Outputs tPLH, tPHL Output Enable Time tPZL, tPZH Output Disabling Time Output Transition Times tPLZ, tPHZ tTLH, tTHL Input Capacitance CI - - - 10 10 10 pF Three-State Output Capacitance CO - - - 20 20 20 pF Power Dissipation Capacitance (Notes 3, 4) CPD - 5 36 - - - pF NOTES: 3. CPD is used to determine the dynamic power consumption, per multiplexer. 4. PD = VCC2 fi (CPD + CL) where fi = Input Frequency, CL = Output Load Capacitance, VCC = Supply Voltage. 5 CD54HC126, CD74HC126, CD54HCT126, CD74HCT126 Test Circuits and Waveforms tr = 6ns tf = 6ns 90% 50% 10% INPUT GND tTLH tPHL 6ns 10% 2.7 1.3 OUTPUT LOW TO OFF 90% OUTPUT HIGH TO OFF 50% OUTPUTS DISABLED FIGURE 8. HC THREE-STATE PROPAGATION DELAY WAVEFORM OTHER INPUTS TIED HIGH OR LOW OUTPUT DISABLE IC WITH THREESTATE OUTPUT GND 1.3V tPZH 90% OUTPUTS ENABLED OUTPUTS ENABLED 0.3 10% tPHZ tPZH 3V tPZL tPLZ 50% OUTPUTS ENABLED 6ns GND 10% tPHZ tf OUTPUT DISABLE tPZL tPLZ OUTPUT HIGH TO OFF 6ns tr VCC 90% tPLH FIGURE 7. HCT TRANSITION TIMES AND PROPAGATION DELAY TIMES, COMBINATION LOGIC 6ns OUTPUT LOW TO OFF 1.3V 10% INVERTING OUTPUT FIGURE 6. HC TRANSITION TIMES AND PROPAGATION DELAY TIMES, COMBINATION LOGIC 50% tTLH 90% tPLH tPHL GND tTHL 90% 50% 10% INVERTING OUTPUT 3V 2.7V 1.3V 0.3V INPUT tTHL OUTPUT DISABLE tf = 6ns tr = 6ns VCC 1.3V OUTPUTS DISABLED OUTPUTS ENABLED FIGURE 9. HCT THREE-STATE PROPAGATION DELAY WAVEFORM OUTPUT RL = 1kΩ CL 50pF VCC FOR tPLZ AND tPZL GND FOR tPHZ AND tPZH NOTE: Open drain waveforms tPLZ and tPZL are the same as those for three-state shown on the left. The test circuit is Output RL = 1kΩ to VCC, CL = 50pF. FIGURE 10. HC AND HCT THREE-STATE PROPAGATION DELAY TEST CIRCUIT 6 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. 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