74AHC14; 74AHCT14 Hex inverting Schmitt trigger Rev. 04 — 25 April 2008 Product data sheet General description
The 74AHC14; 74AHCT14 is a high-speed Si-gate CMOS device and is pin compatiblewith Low-power Schottky TTL (LSTTL). It is specified in compliance with JEDEC standardNo. 7A.
The 74AHC14; 74AHCT14 provides six inverting buffers with Schmitt-trigger action. Theyare capable of transforming slowly changing input signals into sharply defined, jitter-freeoutput signals. Features
■ Balanced propagation delays■ All inputs have Schmitt-trigger actions■ Inputs accept voltages higher than VCC■ Input levels:
◆ For 74AHC14: CMOS level◆ For 74AHCT14: TTL level
◆ HBM EIA/JESD22-A114E exceeds 2000 V◆ MM EIA/JESD22-A115-A exceeds 200 V◆ CDM EIA/JESD22-C101C exceeds 1000 V
■ Multiple package options■ Specified from −40 °C to +85 °C and from −40 °C to +125 °C
NXP Semiconductors 74AHC14; 74AHCT14 Hex inverting Schmitt trigger Ordering information Ordering information Type number Temperature range Name Description
plastic thin shrink small outline package; 14 leads;
plastic dual in-line compatible thermal enhanced very SOT762-1thin quad flat package; no leads; 14 terminals; body2.5 × 3 × 0.85 mm
74AHCT14
plastic thin shrink small outline package; 14 leads;
plastic dual in-line compatible thermal enhanced very SOT762-1thin quad flat package; no leads; 14 terminals; body2.5 × 3 × 0.85 mm
Functional diagram Logic symbol IEC logic symbol Logic diagram (one Schmitt-trigger)
NXP B.V. 2008. All rights reserved. Product data sheet Rev. 04 — 25 April 2008 NXP Semiconductors 74AHC14; 74AHCT14 Hex inverting Schmitt trigger Pinning information 5.1 Pinning
(1) The die substrate is attached to this pad using
conductive die attach material. It can not be used as asupply pin or input. Pin configuration SO14 and TSSOP14 Pin configuration DHVQFN14 5.2 Pin description Pin description Description
NXP B.V. 2008. All rights reserved. Product data sheet Rev. 04 — 25 April 2008 NXP Semiconductors 74AHC14; 74AHCT14 Hex inverting Schmitt trigger Functional description Function table Limiting values Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V). Parameter Conditions
The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
For SO14 packages: above 70 °C the value of Ptot derates linearly at 8 mW/K. For TSSOP14 packages: above 60 °C the value of Ptot derates linearly at 5.5 mW/K. For DHVQFN14 packages: above 60 °C the value of Ptot derates linearly at 4.5 mW/K. Recommended operating conditions Operating conditions Parameter Conditions 74AHCT14
NXP B.V. 2008. All rights reserved. Product data sheet Rev. 04 — 25 April 2008 NXP Semiconductors 74AHC14; 74AHCT14 Hex inverting Schmitt trigger Static characteristics Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V). Symbol Parameter Conditions
−40 °C to +85 °C −40 °C to +125 °C Unit 74AHCT14
VI = VCC − 2.1 V; other pinsat VCC or GND; IO = 0 A;VCC = 4.5 V to 5.5 V
NXP B.V. 2008. All rights reserved. Product data sheet Rev. 04 — 25 April 2008 NXP Semiconductors 74AHC14; 74AHCT14 Hex inverting Schmitt trigger 10. Dynamic characteristics Dynamic characteristics
Voltages are referenced to GND (ground = 0 V); for test circuit see
Symbol Parameter Conditions
−40 °C to +85 °C −40 °C to +125 °C Unit 74AHCT14
Typical values are measured at nominal supply voltage (VCC = 3.3 V and VCC = 5.0 V).
CPD is used to determine the dynamic power dissipation (PD in µW). P
fi = input frequency in MHz;fo = output frequency in MHz;CL = output load capacitance in pF;VCC = supply voltage in V;N = number of inputs switching;Σ(C
NXP B.V. 2008. All rights reserved. Product data sheet Rev. 04 — 25 April 2008 NXP Semiconductors 74AHC14; 74AHCT14 Hex inverting Schmitt trigger 11. Waveforms
VOL and VOH are typical voltage output levels that occur with the output load. Input to output propagation delays Measurement points
RT = Termination resistance should be equal to output impedance Zo of the pulse generator
CL = Load capacitance including jig and probe capacitance
Load circuitry for measuring switching times
NXP B.V. 2008. All rights reserved. Product data sheet Rev. 04 — 25 April 2008 NXP Semiconductors 74AHC14; 74AHCT14 Hex inverting Schmitt trigger Test data 12. Transfer characteristics Table 10. Transfer characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V); see and . Symbol Parameter Conditions
−40 °C to +85 °C −40 °C to +125 °C Unit 74AHCT14 13. Transfer characteristics waveforms Transfer characteristics Transfer characteristics definitions
NXP B.V. 2008. All rights reserved. Product data sheet Rev. 04 — 25 April 2008 NXP Semiconductors 74AHC14; 74AHCT14 Hex inverting Schmitt trigger Fig 10. Typical 74AHC transfer characteristics
NXP B.V. 2008. All rights reserved. Product data sheet Rev. 04 — 25 April 2008 NXP Semiconductors 74AHC14; 74AHCT14 Hex inverting Schmitt trigger Fig 11. Typical 74AHCT transfer characteristics 14. Application information
For 74AHC14: f = -- ≈ ------------
For 74AHCT14: f = -- ≈ ------------
Fig 12. Relaxation oscillator
NXP B.V. 2008. All rights reserved. Product data sheet Rev. 04 — 25 April 2008 NXP Semiconductors 74AHC14; 74AHCT14 Hex inverting Schmitt trigger 15. Package outline SO14: plastic small outline package; 14 leads; body width 3.9 mm SOT108-1 DIMENSIONS (inch dimensions are derived from the original mm dimensions)
1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included.
REFERENCES EUROPEAN ISSUE DATE PROJECTION Fig 13. Package outline SOT108-1 (SO14)
NXP B.V. 2008. All rights reserved. Product data sheet Rev. 04 — 25 April 2008 NXP Semiconductors 74AHC14; 74AHCT14 Hex inverting Schmitt trigger TSSOP14: plastic thin shrink small outline package; 14 leads; body width 4.4 mm SOT402-1 DIMENSIONS (mm are the original dimensions)
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
2. Plastic interlead protrusions of 0.25 mm maximum per side are not included. REFERENCES EUROPEAN ISSUE DATE PROJECTION Fig 14. Package outline SOT402-1 (TSSOP14)
NXP B.V. 2008. All rights reserved. Product data sheet Rev. 04 — 25 April 2008 NXP Semiconductors 74AHC14; 74AHCT14 Hex inverting Schmitt trigger DHVQFN14: plastic dual in-line compatible thermal enhanced very thin quad flat package; no leads; 14 terminals; body 2.5 x 3 x 0.85 mm SOT762-1 DIMENSIONS (mm are the original dimensions)
1. Plastic or metal protrusions of 0.075 mm maximum per side are not included.
REFERENCES EUROPEAN ISSUE DATE PROJECTION Fig 15. Package outline SOT762-1 (DHVQFN14)
NXP B.V. 2008. All rights reserved. Product data sheet Rev. 04 — 25 April 2008 NXP Semiconductors 74AHC14; 74AHCT14 Hex inverting Schmitt trigger 16. Abbreviations Table 11. Abbreviations Description
Low-power Schottky Transistor-Transistor Logic
17. Revision history Table 12. Revision history Document ID Release date Data sheet status Change notice Supersedes • The format of this data sheet has been redesigned to comply with the new identity • Legal texts have been adapted to the new company name where appropriate. • or input leakage current have been changed.
NXP B.V. 2008. All rights reserved. Product data sheet Rev. 04 — 25 April 2008 NXP Semiconductors 74AHC14; 74AHCT14 Hex inverting Schmitt trigger 18. Legal information Data sheet status Document status[1][2] Product status[3] Definition
This document contains data from the objective specification for product development.
This document contains data from the preliminary specification.
This document contains the product specification.
Please consult the most recently issued document before initiating or completing a design.
The term ‘short data sheet’ is explained in section “Definitions”.
The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product statusinformation is available on the Internet at URL
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representation or warranty that such applications will be suitable for thespecified use without further testing or modification. Short data sheet — A short data sheet is an extract from a full data sheet with the same product type number(s) and title. A short data sheet is intended Limiting values — Stress above one or more limiting values (as defined in
for quick reference only and should not be relied upon to contain detailed and
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NXP B.V. 2008. All rights reserved. Product data sheet Rev. 04 — 25 April 2008 NXP Semiconductors 74AHC14; 74AHCT14 Hex inverting Schmitt trigger 20. Contents
Please be aware that important notices concerning this document and the product(s)described herein, have been included in section ‘Legal information’. NXP B.V. 2008. All rights reserved.
For more information, please visit: http://www.nxp.comFor sales office addresses, please send an email to: [email protected]Date of release: 25 April 2008 Document identifier: 74AHC_AHCT14_4
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