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74VHCT08A Quad 2-Input AND Gate
July 1997 Revised March 1999
74VHCT08A Quad 2-Input AND Gate
General Description
The VHCT08A is an advanced high speed CMOS 2 Input AND Gate fabricated with silicon gate CMOS technology. It achieves the high-speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation. The internal circuit is composed of 4 stages including buffer output, which provide high noise immunity and stable output. Protection circuits ensure that 0V to 7V can be applied to the input pins without regard to the supply voltage and to the output pins with VCC = 0V. These circuits prevent device destruction due to mismatched supply and input/ output voltages. This device can be used to interface 3V to 5V systems and two supply systems such as battery backup.
Features
s High speed: tPD = 5.0 ns (typ) at TA = 25C s High noise immunity: VIH = 2.0V, VIL = 0.8V s Power down protection is provided on all inputs and outputs s Low noise: VOLP = 0.8V (max) s Low power dissipation: ICC = 2 A (max) @ TA = 25C s Pin and function compatible with 74HCT08
Ordering Code:
Order Number 74VHCT08AM 74VHCT08ASJ 74VHCT08AMTC 74VHCT08AN Package Number M14A M14D MTC14 N14A Package Description 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter "X" to the ordering code
Logic Symbol
IEEE/IEC
Connection Diagram
Pin Descriptions
Pin Names An, Bn On Description Inputs Outputs
Truth Table
A L L H H B L H L H O L L L H
(c) 1999 Fairchild Semiconductor Corporation
DS500025.prf
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74VHCT08A
Absolute Maximum Ratings(Note 1)
Supply Voltage (VCC) DC Input Voltage (VIN) DC Output Voltage (VOUT) (Note 2) (Note 3) Input Diode Current (IIK) Output Diode Current (IOK) (Note 4) DC Output Current (IOUT) DC VCC/GND Current (ICC) Storage Temperature (TSTG) Lead Temperature (TL) (Soldering, 10 seconds) 260C -0.5V to VCC + 0.5V -0.5V to 7.0V -20 mA 20 mA 25 mA 50 mA -65C to +150C -0.5V to +7.0V -0.5V to +7.0V
Recommended Operating Conditions (Note 5)
Supply Voltage (VCC) Input Voltage (VIN) Output Voltage (VOUT) (Note 2) (Note 3) Operating Temperature (TOPR) Input Rise and Fall Time (tr, tf) VCC = 5.0V 0.5V 0 ns/V 20 ns/V
Note 1: Absolute Maximum Ratings are values beyond which the device may be damaged or have its useful life impaired. The databook specifications should be met, without exception, to ensure that the system design is reliable over its power supply, temperature, and output/input loading variables. Fairchild does not recommend operation outside databook specifications. Note 2: HIGH or LOW state. IOUT absolute maximum rating must be observed. Note 3: VCC = 0V. Note 4: VOUT < GND, VOUT > VCC (Outputs Active). Note 5: Unused inputs must be held HIGH or LOW. They may not float.
4.5V to 5.5V 0V to +5.5V 0V to VCC 0V to 5.5V -40C to +85C
DC Electrical Characteristics
Symbol VIH VIL VOH VOL IIN ICC ICCT IOFF Parameter HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Voltage LOW Level Output Voltage Input Leakage Current Quiescent Supply Current Maximum ICC/ Input Output Leakage Current (Power Down State) VCC (V) 4.5 5.5 4.5 5.5 4.5 4.5 4.5 4.5 0 - 5.5 5.5 5.5 0.0 4.40 3.94 0.0 0.1 0.36 0.1 2.0 1.35 0.5 4.50 TA = 25C Min 2.0 2.0 0.8 0.8 4.40 3.80 0.1 0.44 1.0 20.0 1.50 5.0 Typ Max TA = -40C to +85C Min 2.0 2.0 0.8 0.8 Max Units V V V V V V A A mA A VIN = VIH or VIL VIN = VIH or VIL IOH = -50 A IOH = -8 mA IOL = 50 A IOL = 8 mA Conditions
VIN = 5.5V or GND VIN = VCC or GND V IN = 3.4V Other Inputs = V CC or GND VOUT = 5.5V
Noise Characteristics
Symbol VOLP (Note 6) VOLV (Note 6) VIHD (Note 6) VILD (Note 6) Parameter Quiet Output Maximum Dynamic VOL Quiet Output Minimum Dynamic VOL Minimum HIGH Level Dynamic Input Voltage Maximum LOW Level Dynamic Input Voltage VCC (V) 5.0 5.0 5.0 5.0 TA = 25C Typ 0.4 -0.4 Limit 0.8 -0.8 2.0 0.8 Units V V V V Conditions CL = 50 pF CL = 50 pF CL = 50 pF CL = 50 pF
Note 6: Parameter guaranteed by design.
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74VHCT08A
AC Electrical Characteristics
Symbol tPLH tPHL CIN CPD Input Capacitance Power Dissipation Capacitance Parameter Propagation Delay VCC (V) 5.0 0.5 TA = 25C Min Typ 5.0 5.5 4 18 Max 6.9 7.9 10 TA = -40C to +85C Min 1.0 1.0 Max 8.0 9.0 10 pF pF Units ns Conditions CL = 15 pF CL = 50 pF VCC = Open (Note 7)
Note 7: 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 from the equation: ICC (opr.) = CPD * VCC * fIN + ICC/4 (per gate)
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74VHCT08A
Physical Dimensions inches (millimeters) unless otherwise noted
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow Package Number M14A
14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M14D
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74VHCT08A
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Package Number MTC14
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74VHCT08A Quad 2-Input AND Gate
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Package Number N14A
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 1. Life support devices or systems are devices or systems device or system whose failure to perform can be reawhich, (a) are intended for surgical implant into the sonably expected to cause the failure of the life support body, or (b) support or sustain life, and (c) whose failure device or system, or to affect its safety or effectiveness. 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 www.fairchildsemi.com user.
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.

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