74VHC14 Hex Schmitt Inverter
October 1995
74VHC14 Hex Schmitt Inverter
General Description
The ’VHC14 is an advanced high speed CMOS Hex Schmitt Inverter 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 Pin configuration and function are the same as the VHC04 but the inputs have hysteresis between the positive-going and negative-going input thresholds which are capable of transforming slowly changing input signals into sharply defined jitter-free output signals thus providing greater noise margin than conventional inverters An input protection circuit ensures that 0V to 7V can be applied to the input pins without regard to the supply voltage This device can be used to interface 5V to 3V systems and two supply systems such as battery back up This circuit prevents device destruction due to mismatched supply and input voltages
Features
Y Y Y
Y Y Y
Low power dissipation ICC e 2 mA (Max) at TA e 25 C High noise immunity VNIH e VNIL e 28% VCC (Min) All inputs are equipped with a power down protection function Balanced propagation delays TPLH j TPHL Low noise VOLP e 0 8V (Max) Pin and function compatible with 74HC14
Commercial 74VHC14M 74VHC14SJ 74VHC14MSC 74VHC14MTC 74VHC14N
Package Number M14A M14D MSC14 MTC14 N14A
Package Description 14-Lead Molded JEDEC SOIC 14-Lead Molded EIAJ SOIC 14-Lead Molded EIAJ Type 1 SSOP 14-Lead Molded JEDEC Type 1 TSSOP 14-Lead Molded DIP
Note Surface mount packages are also available on Tape and Reel Specify by appending the suffix letter ‘‘X’’ to the ordering code EIAJ Type 1 SSOP available on Tape and Reel only order MSCX
Logic Symbol
IEEE IEC
Connection Diagram
Pin Assignment for DIP SSOP TSSOP and SOIC
TL F 11617 – 1
Truth Table
A-Inputs L H Y-Outputs H L
TL F 11617 – 2
C1995 National Semiconductor Corporation
TL F 11617
RRD-B30M125 Printed in U S A
Absolute Maximum Ratings (Note 1)
Supply Voltage (VCC) DC Input Voltage (VIN) DC Output Voltage (VOUT) Input Diode Current (IIK) Output Diode Current (IOK) DC Output Current (IOUT) DC VCC GND Current (ICC) Storage Temperature (TSTG) Lead Temperature (TL) Soldering (10 seconds)
b 0 5V to a 7 0V b 0 5V to a 7 0V b 0 5V to VCC a 0 5V b 20 mA
g 20 mA g 25 mA g 50 mA
Note 1 Absolute maximum ratings are values beyond which the device may be damaged or have its useful life impaired The data book 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 outside databook specifications
b 65 C to a 150 C
Recommended Operating Conditions
Supply Voltage (VCC) Input Voltage (VIN) Output Voltage (VOUT) Operating Temperature (TOPR)
a 2 0V to a 5 5V
260 C
0V to a 5 5V 0V to VCC
b 40 C to a 85 C
DC Characteristics for ’VHC Family Devices
74VHC Symbol Parameter VCC Min VP Positive Threshold Voltage Negative Threshold Voltage Hysteresis Voltage 30 45 55 30 45 55 30 45 55 20 30 45 30 45 VOL Low Level Output Voltage 20 30 45 30 45 IIN ICC Input Leakage Current Quiescent Supply Current 0–5 5 55 0 90 1 35 1 65 0 30 0 40 0 50 19 29 44 2 58 3 94 00 00 00 01 01 01 0 36 0 36
g0 1
74VHC TA e b40 C to a 85 C Max 2 20 3 15 3 85 0 90 1 35 1 65 1 20 1 40 1 60 0 30 0 40 0 50 19 29 44 2 48 3 80 01 01 01 0 44 0 44
g1 0
TA e 25 C Typ
Units
Conditions
Min
Max 2 20 3 15 3 85 V
VN
V 1 20 1 40 1 60
VH
V
VOH
High Level Output Voltage
20 30 45
V VIN e VIL V
IOH e b50 mA IOH e b4 mA IOH e b8 mA IOL e 50 mA VIN e VIH IOL e 4 mA IOL e 8 mA VIN e 5 5V or GND VIN e VCC or GND
V
V mA mA
20
20 0
2
DC Characteristics for ’VHC Family Devices
74VHC Symbol Parameter VCC TA e 25 C Typ VOLP VOLV VIHD VILD Quiet Output Maximum Dynamic VOL Quiet Output Minimum Dynamic VOL Minimum High Level Dynamic Input Voltage Maximum Low Level Dynamic Input Voltage 50 50 50 50 04
b0 4
Units
Conditions
Limits 08
b0 8
V V V V
CL e 50 pF CL e 50 pF CL e 50 pF CL e 50 pF
35 15
Parameter guaranteed by design
AC Electrical Characteristics
74VHC Symbol Parameter VCC Min tPLH
tPHL
74VHC TA e b40 C to a 85 C Max 12 8 16 3 86 10 6 10 Min 10 10 10 10 Max 15 0 18 5 10 0 12 0 10 pF pF ns ns CL e 15 pF CL e 50 pF CL e 15 pF CL e 50 pF VCC e Open (Note 1) Units Conditions
TA e 25 C Typ 83 10 8
Propagation Delay Time
3 3 g0 3
5 0 g0 5 CIN CPD Input Capacitance Power Dissipation Capacitance
55 70 4 21
Note 1 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) e CPD VCC fIN a ICC 6 (per Gate)
Ordering Information
The device number is used to form part of a simplfied purchasing code where the package type and temperature range are defined as follows
TL F 11617 – 3
3
Physical Dimensions inches (millimeters)
14-Lead Small Outline Integrated Circuit NS Package Number M14A
JEDEC (M)
14-Lead Small OutLine Package EIAJ (SJ) NS Package Number M14D
4
Physical Dimensions inches (millimeters) (Continued)
14-Lead Plastic EIAJ SSOP Type 1 (MSC) NS Package Number MSC14
14-Lead Molded JEDEC Type 1 (TSSOP) NS Package Number MTC14
5
74VHC14 Hex Schmitt Inverter
Physical Dimensions inches (millimeters) (Continued)
14-Lead Molded DIP NS Package Number N14A
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National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications
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