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54AC14 Hex Inverter with Schmitt Trigger Input
July 1998
54AC14 Hex Inverter with Schmitt Trigger Input
General Description
The ’AC14 contains six inverter gates each with a Schmitt trigger input. The ’AC14 contains six logic inverters which accept standard CMOS input signals and provide standard CMOS output levels. They are capable of transforming slowly changing input signals into sharply defined, jitter-free output signals. In addition, they have a greater noise margin than conventional inverters. The ’AC14 has hysteresis between the positive-going and negative-going input thresholds (typically 1.0V) which is determined internally by transistor ratios and is essentially insensitive to temperature and supply voltage variations.
Features
n ICC reduced by 50% n Outputs source/sink 24 mA n Standard Military Drawing (SMD) — ’AC14: 5962-87624
Logic Symbol
IEEE/IEC
DS100263-1
Function Table
Input A L H Output O H L
FACT™ is a trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation
DS100263
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Connection Diagrams
Pin Assignment for DIP and Flatpack
Pin Assignment for LCC
DS100263-3 DS100263-2
Pin Names In On
Description Inputs Outputs
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Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (VCC) DC Input Diode Current (IIK) VI = −0.5V VI = VCC + 0.5V DC Input Voltage (VI) DC Output Diode Current (IOK) VO = −0.5V VO = VCC + 0.5V DC Output Voltage (VO) DC Output Source or Sink Current (IO) DC VCC or Ground Current per Output Pin (ICC or IGND) −0.5V to +7.0V −20 mA +20 mA −0.5V to VCC + 0.5V −20 mA +20 mA −0.5V to VCC + 0.5V
Storage Temperature (TSTG) Junction Temperature (TJ) CDIP
−65˚C to +150˚C 175˚C
Recommended Operating Conditions
Supply Voltage (VCC) ’AC Input Voltage (VI) Output Voltage (VO) Operating Temperature (TA) 54AC 2.0V to 6.0V 0V to VCC 0V to VCC −55˚C to +125˚C
± 50 mA ± 50 mA
Note 1: Absolute maximum ratings are those values beyond which damage to the device may occur. 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. National does not recommend operation of FACT™ circuits outside databook specifications.
DC Characteristics for ’AC Family Devices
Symbol Parameter VCC (V) Guaranteed Limits VOH Minimum High Level Output Voltage 3.0 4.5 5.5 3.0 4.5 5.5 VOL Maximum Low Level Output Voltage 3.0 4.5 5.5 3.0 4.5 5.5 IIN Vt+ Maximum Input Leakage Current Maximum Positive Threshold Vt− Minimum Negative Threshold Vh(max) Maximum Hysteresis 3.0 4.5 5.5 3.0 4.5 5.5 3.0 4.5 5.5 Vh(min) Minimum Hysteresis 3.0 4.5 5.5 2.2 3.2 3.9 0.5 0.9 1.1 1.2 1.4 1.6 0.3 0.4 0.5 V TA = Worst Case V TA = Worst Case V TA = Worst Case V TA = Worst Case 5.5 2.9 4.4 5.4 (Note 2) VIN = VIL or VIH 2.4 3.7 4.7 0.1 0.1 0.1 (Note 2) VIN = VIL or VIH 0.5 0.5 0.5 V µA VI = VCC, GND 12 mA IOL 24 mA 24 mA V IOUT = 50 µA V −12 mA IOH −24 mA −24 mA V IOUT = −50 µA 54AC TA = −55˚C to +125˚C Units Conditions
± 1.0
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DC Characteristics for ’AC Family Devices
Symbol Parameter VCC (V)
(Continued)
54AC TA = −55˚C to +125˚C Guaranteed Limits
Units
Conditions
IOLD IOHD ICC
(Note 3) Minimum Dynamic Output Current Maximum Quiescent Supply Current
5.5 5.5 5.5
50 −50 40.0
mA mA µA
VOLD = 1.65V Max VOHD = 3.85V Min VIN = VCC or GND
Note 2: All outputs loaded; thresholds on input associated with output under test. Note 3: Maximum test duration 2.0 ms, one output loaded at a time. Note 4: IIN and ICC @ 3.0V are guaranteed to be less than or equal to the respective limit @ 5.5V VCC. ICC for 54AC @ 25˚C is identical to 74AC @ 25˚C.
AC Electrical Characteristics
VCC Symbol Parameter (V) (Note 5) Min tPLH tPHL Propagation Delay Propagation Delay 3.3 5.0 3.3 5.0
Note 5: Voltage Range 3.3 is 3.3V ± 0.3V Voltage Range 5.0 is 5.0V ± 0.5V
54AC TA = −55˚C to +125˚C CL = 50 pF Max 16.0 12.0 14.0 10.0 ns ns 1.0 1.0 1.0 1.5 Units
Fig. No.
Capacitance
Symbol CIN CPD Parameter Input Capacitance Power Dissipation Capacitance Typ 4.5 25.0 Units pF pF Conditions VCC = OPEN VCC = 5.0V
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Physical Dimensions
inches (millimeters) unless otherwise noted
20 Terminal Ceramic Leadless Chip Carrier (L) NS Package Number E20A
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Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
14-Lead Ceramic Dual-In-Line Package (D) NS Package Number J14A
14-Lead Ceramic Flatpak (F) NS Package Number W14B
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54AC14 Hex Inverter with Schmitt Trigger Input
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