1. General description
The 74HC27; 74HCT27 is a triple 3-input NOR gate. Inputs include clamp diodes. This
enables the use of current limiting resistors to interface inputs to voltages in excess of
VCC.
2. Features and benefits
Complies with JEDEC standard no. 7A
Input levels:
For 74HC27: CMOS level
For 74HCT27: TTL level
ESD protection:
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V
Multiple package options
Specified from 40 Cto+85C and from 40 Cto+125C
3. Ordering information
74HC27; 74HCT27
Triple 3-input NOR gate
Rev. 5.1 — 27 November 2015 Product data sheet
Table 1. Ordering information
Type number Package
Temp erature range Name Description Version
74HC27D 40 C to +125 C SO14 plastic small outline package; 14 leads; body width 3.9 mm SOT108-1
74HCT27D
74HC27DB 40 C to +125 C SSOP14 plastic shrink small outline package; 14 leads; body width
5.3 mm SOT337-1
74HCT27DB
74HC27PW 40 C to +125 C TSSOP14 plastic thin shrink small outline package; 14 leads; body
width 4.4 mm SOT402-1
74HCT27PW
74HC27BQ 40 C to +125 C DHVQFN14 plastic dual in-line compatible thermal enhanced very thin
quad flat package; no leads; 14 terminals;
body 2.5 30.85 mm
SOT762-1
74HCT27BQ
© Nexperia B.V. 2017. All rights reserved
74HC_HCT27 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5.1 — 27 November 2015 2 of 16
Nexperia 74HC27; 74HCT27
Triple 3-input NOR gate
4. Functional diagram
5. Pinning information
5.1 Pinning
Fig 1. Logic symbol Fig 2. IEC logic symbol Fig 3. Logic diagram (one gate)
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However, if it is soldered, the solder land should remain
floating or be connected to GND.
Fig 4. Pin configuration SO14, (T)SSOP14 Fig 5. Pin configura ti on DHVQFN14
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© Nexperia B.V. 2017. All rights reserved
74HC_HCT27 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5.1 — 27 November 2015 3 of 16
Nexperia 74HC27; 74HCT27
Triple 3-input NOR gate
5.2 Pin description
6. Functional description
[1] H = HIGH voltage level; L = LOW voltage level; X = don’t care.
7. Limiting values
[1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
[2] For SO14 package: Ptot derates linearly with 8 mW/K above 70 C.
For (T)SSOP14 packages: Ptot derates linearly with 5.5 mW/K above 60 C.
For DHVQFN14 packages: Ptot derates linearly with 4.5 mW/K above 60 C.
Table 2. Pin de scription
Symbol Pin Description
1A, 2A, 3A 1, 3, 9 data input
1B, 2B, 3B 2, 4, 10 data input
1C, 2C, 3C 13, 5, 11 data input
1Y, 2Y, 3Y 12, 6, 8 data output
GND 7 ground (0 V)
VCC 14 supply voltage
Table 3. Function table[1]
Inputs Outputs
nA nB nC nY
LLLH
XXHL
XHXL
HXXL
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions Min Max Unit
VCC supply voltage 0.5 +7 V
IIK input clamping current VI < 0.5 V or VI>V
CC +0.5 V [1] -20 mA
IOK output clamping current VO<0.5 V or VO>V
CC +0.5V [1] -20 mA
IOoutput curren t 0.5 V < VO < VCC +0.5V - 25 mA
ICC supply current - 50 mA
IGND ground current 50 - mA
Tstg storage temperature 65 +150 C
Ptot total power dissipation SO14, (T)SSOP14 and DHVQFN14
packages [2] -500mW
© Nexperia B.V. 2017. All rights reserved
74HC_HCT27 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5.1 — 27 November 2015 4 of 16
Nexperia 74HC27; 74HCT27
Triple 3-input NOR gate
8. Recommended operating conditions
9. Static characteristics
Table 5. Re commended operating conditions
Voltages are referenced to GND (ground = 0 V)
Symbol Parameter Conditions 74HC27 74HCT27 Unit
Min Typ Max Min Typ Max
VCC supply voltage 2.0 5.0 6.0 4.5 5.0 5.5 V
VIinput voltage 0 - VCC 0-V
CC V
VOoutput voltage 0 - VCC 0-V
CC V
Tamb ambient temperature 40 +25 +125 40 +25 +125 C
t/V input transition rise and fall rate VCC = 2.0 V - - 625 - - - ns/V
VCC = 4.5 V - 1.67 139 - 1.67 139 ns/V
VCC = 6.0 V - - 83 - - - ns/V
Table 6. Static characteristics type 74HC27; 74HCT27
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions 25 C40 C to +85 C40 C to +125 CUnit
Min Typ Max Min Max Min Max
74HC27
VIH HIGH-level
input voltage VCC = 2.0 V 1.5 1.2 - 1.5 - 1.5 - V
VCC = 4.5 V 3.15 2.4 - 3.15 - 3.15 - V
VCC = 6.0 V 4.2 3.2 - 4.2 - 4.2 - V
VIL LOW-level
input voltage VCC = 2.0 V - 0.8 0.5 - 0.5 - 0.5 V
VCC = 4.5 V - 2.1 1.35 - 1.35 - 1.35 V
VCC = 6.0 V - 2.8 1.8 - 1.8 - 1.8 V
VOH HIGH-level
output voltage VI=V
IH or VIL
IO=20 A; VCC = 2.0 V 1.9 2.0 - 1.9 - 1.9 - V
IO=20 A; VCC = 4.5 V 4.4 4.5 - 4.4 - 4.4 - V
IO=20 A; VCC = 6.0 V 5.9 6.0 - 5.9 - 5.9 - V
IO=4.0 mA; VCC = 4.5 V 3.98 4.32 - 3.84 - 3.7 - V
IO=5.2 mA; VCC = 6.0 V 5.48 5.81 - 5.34 - 5.2 - V
VOL LOW-level
output voltage VI=V
IH or VIL
IO=20A; VCC = 2.0 V - 0 0.1 - 0.1 - 0.1 V
IO=20A; VCC = 4.5 V - 0 0.1 - 0.1 - 0.1 V
IO=20A; VCC = 6.0 V - 0 0.1 - 0.1 - 0.1 V
IO=4.0mA; V
CC = 4.5 V - 0.15 0.26 - 0.33 - 0.4 V
IO=5.2mA; V
CC = 6.0 V - 0.16 0.26 - 0.33 - 0.4 V
IIinput leakage
current VI=V
CC or GND;
VCC =6.0V --0.1 - 1.0 - 1.0 A
ICC supply current VI=V
CC or GND; IO=0A;
VCC =6.0V - - 2.0 - 20 - 40 A
© Nexperia B.V. 2017. All rights reserved
74HC_HCT27 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5.1 — 27 November 2015 5 of 16
Nexperia 74HC27; 74HCT27
Triple 3-input NOR gate
CIinput
capacitance -3.5- - - - - pF
74HCT27
VIH HIGH-level
input voltage VCC = 4.5 V to 5.5 V 2.0 1. 6 - 2.0 - 2.0 - V
VIL LOW-level
input voltage VCC = 4.5 V to 5.5 V - 1.2 0.8 - 0.8 - 0.8 V
VOH HIGH-level
output voltage VI=V
IH or VIL; VCC =4.5V
IO=20 A 4.4 4.5 - 4.4 - 4.4 - V
IO=4.0 mA 3.98 4.32 - 3.84 - 3.7 - V
VOL LOW-level
output voltage VI=V
IH or VIL; VCC =4.5V
IO=20A - 0 0.1 - 0.1 - 0.1 V
IO= 4.0 mA - 0.16 0.26 - 0.33 - 0.4 V
IIinput leakage
current VI=V
CC or GND;
VCC =5.5V --0.1 - 1.0 - 1.0 A
ICC supply current VI=V
CC or GND;
VCC =5.5V; I
O=0A - - 2.0 - 20 - 40 A
ICC additional
supply current per input pi n;
VI=V
CC 2.1 V;
other inputs at VCC or GND;
VCC = 4.5 V to 5.5 V;
IO=0A
nA, nB or nC inputs - 150 540 - 675 - 735 A
CIinput
capacitance -3.5- - - - - pF
Table 6. Static characteristics type 74HC27; 74HCT27 …continued
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions 25 C40 C to +85 C40 C to +125 CUnit
Min Typ Max Min Max Min Max
© Nexperia B.V. 2017. All rights reserved
74HC_HCT27 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5.1 — 27 November 2015 6 of 16
Nexperia 74HC27; 74HCT27
Triple 3-input NOR gate
10. Dynamic characteristics
[1] tpd is the same as tPHL and tPLH.
[2] tt is the same as tTHL and tTLH.
[3] CPD is used to determine the dynamic power dissipation (PD in W):
PD=C
PD VCC2fiN+ (CLVCC2fo) where:
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;
(CLVCC2fo) = sum of outputs.
Table 7. Dynamic characteristics type 74HC27; 74HCT27
GND = 0 V; for load circuit see Figure 7.
Symbol Parameter Conditions 25 C40 C to +125 CUnit
Min Typ Max Max
(85 C) Max
(125 C)
74HC27
tpd propagation delay nA, nB, nC to nY; see Figure 6 [1]
VCC = 2.0 V - 28 90 115 135 ns
VCC = 4.5 V - 10 18 23 27 ns
VCC = 5.0 V; CL=15pF - 8 - - - ns
VCC = 6.0 V - 8 15 20 23 ns
tttransition time see Figure 6 [2]
VCC = 2.0 V - 19 75 95 110 ns
VCC = 4.5 V - 7 15 19 22 ns
VCC = 6.0 V - 6 13 16 19 ns
CPD power dissipation
capacitance per package; VI=GNDtoV
CC [3] -24- - -pF
74HCT27
tpd propagation delay nA, nB, nC to nY; see Figure 6 [1]
VCC = 4.5 V - 12 21 26 32 ns
VCC = 5.0 V; CL=15pF - 10 - - - ns
tttransition time VCC = 4.5 V; see Figure 6 [2] - 7 15 19 22 ns
CPD power dissipation
capacitance per package;
VI=GNDtoV
CC 1.5 V [3] -30- - -pF
© Nexperia B.V. 2017. All rights reserved
74HC_HCT27 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5.1 — 27 November 2015 7 of 16
Nexperia 74HC27; 74HCT27
Triple 3-input NOR gate
11. Waveforms
Measurement points are given in Table 8.
VOL and VOH are typical voltage output drop that occur with the output load.
Fig 6. Input (nA, nB, nC) to output (nY) propagation delays and output transition times
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Table 8. Measur ement points
Type Input Output
VMVMVXVY
74HC27 0.5VCC 0.5VCC 0.1VCC 0.9VCC
74HCT27 1.3 V 1.3 V 0.1VCC 0.9VCC
© Nexperia B.V. 2017. All rights reserved
74HC_HCT27 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5.1 — 27 November 2015 8 of 16
Nexperia 74HC27; 74HCT27
Triple 3-input NOR gate
Test data is given in Table 9.
Definitions test circuit:
RT = Termination resistance should be equal to output impedance Zo of the pulse generator.
CL = Load capacitance including jig and probe capacitance.
RL = Load resistance.
S1 = Test selection switch
Fig 7. Test circuit for measuring switching times
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Type Input Load S1 position
VItr, tfCLRLtPHL, tPLH
74HC27 VCC 6ns 15pF, 50 pF 1kopen
74HCT27 3V 6ns 15pF, 50 pF 1kopen
© Nexperia B.V. 2017. All rights reserved
74HC_HCT27 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5.1 — 27 November 2015 9 of 16
Nexperia 74HC27; 74HCT27
Triple 3-input NOR gate
12. Package outline
Fig 8. Package outline SOT108-1 (SO14)
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© Nexperia B.V. 2017. All rights reserved
74HC_HCT27 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5.1 — 27 November 2015 10 of 16
Nexperia 74HC27; 74HCT27
Triple 3-input NOR gate
Fig 9. Package outline SOT337-1 (SSOP14)
© Nexperia B.V. 2017. All rights reserved
74HC_HCT27 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5.1 — 27 November 2015 11 of 16
Nexperia 74HC27; 74HCT27
Triple 3-input NOR gate
Fig 10. Package outline SOT402-1 (TSSOP14)
© Nexperia B.V. 2017. All rights reserved
74HC_HCT27 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5.1 — 27 November 2015 12 of 16
Nexperia 74HC27; 74HCT27
Triple 3-input NOR gate
Fig 11. Package outline SOT762-1 (DHVQFN14)
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© Nexperia B.V. 2017. All rights reserved
74HC_HCT27 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5.1 — 27 November 2015 13 of 16
Nexperia 74HC27; 74HCT27
Triple 3-input NOR gate
13. Abbreviations
14. Revision history
Table 10. Abbreviations
Acronym Description
CMOS Complementary Metal Oxide Semiconductor
DUT Device Under Test
ESD ElectroStatic Discharge
HBM Human Body Model
MM Machine Model
TTL Transistor-Transistor Logic
Table 11. Revision history
Document ID Release date Data sheet status Change notice Supersedes
74HC_HCT27 v.5.1 20151127 Product data sheet - 74HC_HCT27 v.5
Modifications: •Correction of typo modification date.
74HC_HCT27 v.5 20151115 Product data sheet - 74HC_HCT27 v.4
Modifications: •Type numbers 74HC27N and 74HCT27N (SOT27-1) removed.
74HC_HCT27 v.4 20130605 Product data sheet - 74HC_HCT27 v.3
Modifications: •The format of this data sheet has been redesigned to comply with the new identity
guidelines of NXP Semiconductors.
•Legal texts have been adapted to the new company name where appropriate.
74HC_HCT27 v.3 20080107 Product data sheet - 74HC_HCT27_CNV v.2
74HC_HCT27_CNV v.2 19970828 Product specification - -
© Nexperia B.V. 2017. All rights reserved
74HC_HCT27 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5.1 — 27 November 2015 14 of 16
Nexperia 74HC27; 74HCT27
Triple 3-input NOR gate
15. Legal information
15.1 Data sheet status
[1] Please consult the most recently issued document before initiating or completing a design.
[2] The term ‘short data sheet’ is explained in section “Definitions”.
[3] The product status of de vice(s) descr ibed in th is document m ay have cha nged since thi s document w as publish ed and may di ffe r in case of multiple devices. The latest product status
information is available on the Internet at URL http://www.nexperia.com.
15.2 Definitions
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. Nexperia does not give any
representations or warranties as to the accuracy or completeness of
information included herein and shall have no liab ility for the consequences of
use of such information.
Short data sheet — A short data sheet is an extract from a full data sheet
with the same product type number(s) and tit le. A short data sh eet is intended
for quick reference only and shou ld not b e relied u pon to cont ain det ailed and
full information. For detailed and full informatio n see the relevant full dat a
sheet, which is available on request via the local Nexperia sales
office. In case of any inconsistency or conflict with the short data sheet, the
full data sheet shall pre va il.
Product specificat ion — The information and data provided in a Product
data sheet shall define the specification of the product as agreed between
Nexperia and its customer, unless Nexperia and
customer have explicitly agreed otherwise in writing. In no event however,
shall an agreement be valid in which the Nexperia product is
deemed to off er functions and qualities beyond those described in the
Product data sheet.
15.3 Disclaimers
Limited warr a nty and liability — Information in this document is believed to
be accurate and reliable. However, Nexperia does not give any
representations or warrant ies, expressed or implied, as to the accuracy or
completeness of such information and shall have no liability for the
consequences of use of such information. Nexperia takes no
responsibility for the content in this document if provided by an information
source outside of Nexperia.
In no event shall Nexperia be liable for any indirect, incidental,
punitive, special or consequ ential damages (including - wit hout limitation - lost
profits, lost savings, business interruption, costs related to the removal or
replacement of any products or rework charges) whether or not such
damages are based on tort (including negligence), warranty, breach of
contract or any other legal theory.
Notwithstanding any damages that customer might incur for any reason
whatsoever, Nexperia’s aggregate and cumulative liability towards
customer for the products described herein shall be limited in accordance
with the Terms and conditions of commercial sale of Nexperia.
Right to make changes — Nexperia reserves the right to make
changes to information published in this document, including without
limitation specifications and product descriptions, at any time and without
notice. This document supersedes and replaces all informa tion supplied prior
to the publication hereof .
Suitability for use — Nexperia products are not designed,
authorized or warranted to be suitable for use in life support, life-critical or
safety-critical systems or equipment, nor in applications where failure or
malfunction of a Nexperia product can reasonably be expected
to result in perso nal injury, death or severe property or environmental
damage. Nexperia and its suppliers accept no liability for
inclusion and/or use of Nexperia products in such equipment or
applications and ther efore such inclu sion and/or use is at the cu stomer’s own
risk.
Applications — Applications that are described herein for any of these
products are for illustrative purposes only. Nexperia makes no
representation or warranty that such applications will be suitable for the
specified use without further testing or modification.
Customers are responsible for the design and ope ration of their applications
and products using Nexperia products, and Nexperia
accepts no liability for any assistance with applicati ons or customer product
design. It is customer’s sole responsibility to determine whether the Nexperia
product is suitable and fit for the customer’s applications and
products planned, as well as fo r the planned application and use of
customer’s third party customer(s). Custo mers should provide appropriate
design and operating safeguards to minimize the risks associate d with their
applications and products.
Nexperia does not accept any liability related to any default,
damage, costs or problem which is based on any weakness or default in the
customer’s applications or products, or the application or use by customer’s
third party custo mer(s). Customer is responsible for doing all necessary
testing for the customer’s applications and products using Nexperia
products in order to avoid a default of the applications and
the products or of the application or use by cust omer’s third party
customer(s). Nexperia does not accept any liability in this respect.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) will cause permanent
damage to the device. Limiting values are stress ratings only and (proper)
operation of the device at these or any other conditions above those given in
the Recommended operating conditions section (if present) or the
Characteristics sections of this document is not warranted. Constant or
repeated exposure to limiting values will permanently and irreversibly affect
the quality and reliability of the device.
Terms and conditions of commercial sale — Nexperia
products are sold subject to the general terms and conditions of commercial
sale, as published at http://www.nexperia.com/profile/terms, unless otherwise
agreed in a valid written individua l agreement. In case an individual
agreement is concluded only the terms and conditions of the respective
agreement shall apply. Nexperia hereby expressly objects to
applying the customer’s general terms and conditions with regard to the
purchase of Nexperia products by customer.
No offer to sell or license — Nothing i n this document may be interpreted or
construed as an of fer t o sell product s that is open for accept ance or the gr ant,
conveyance or implication of any license under any copyrights, patents or
other industrial or inte llectual property rights.
Document status[1][2] Product status[3] Definition
Objective [short] data sheet Development This document contain s data from the objective specification for product development.
Preliminary [short] dat a sheet Qualification This document contains data from the preliminary specification.
Product [short] data sheet Production This document contains the product specification.
© Nexperia B.V. 2017. All rights reserved
74HC_HCT27 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5.1 — 27 November 2015 15 of 16
Nexperia 74HC27; 74HCT27
Triple 3-input NOR gate
Export control — This document as well as the item(s) described herein
may be subject to export control regulations. Export might require a prior
authorization from competent authorities.
Non-automotive qualified products — Unless this data sheet expressly
states that this specific Nexperia product is automotive qualified,
the product is not suitable for automotive use. It i s neit her qualif ied nor test ed
in accordance with automotive testing or application requirements. Nexperia
accepts no liability for inclusion and/or use of
non-automotive qualified products in automotive equipment or applications.
In the event that customer uses the product for design-in and use in
automotive applications to automot ive specifications and standards, custome r
(a) shall use the product without Nexperia’s warranty of the
product for such au tomotive applications, use and specifications, and (b)
whenever customer uses the product for automotive applications beyond
Nexperia’s specifications such use shall be solely at customer’s
own risk, and (c) customer fully indemnifies Nexperia for any
liability, damages or failed product claims resulting from custome r design and
use of the product for automotive applications beyond Nexperia’s
standard warranty and Nexperia’s product specifications.
Translations — A non-English (translated) version of a document is for
reference only. The English version shall prevail in case of any discrepancy
between the translated and English versions.
15.4 Trademarks
Notice: All referenced b rands, produc t names, service names and trademarks
are the property of their respective ow ners.
16. Contact information
For more information, please visit: http://www.nexperia.com
For sales office addresses, please send an email to: salesaddresses@nexperia.com
Nexperia 74HC27; 74HCT27
Triple 3-input NOR gate
17. Contents
1 General description. . . . . . . . . . . . . . . . . . . . . . 1
2 Features and benefits . . . . . . . . . . . . . . . . . . . . 1
3 Ordering information. . . . . . . . . . . . . . . . . . . . . 1
4 Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2
5 Pinning information. . . . . . . . . . . . . . . . . . . . . . 2
5.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
5.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 3
6 Functional description . . . . . . . . . . . . . . . . . . . 3
7 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 3
8 Recommended operating conditions. . . . . . . . 4
9 Static characteristics. . . . . . . . . . . . . . . . . . . . . 4
10 Dynamic characteristics . . . . . . . . . . . . . . . . . . 6
11 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
12 Package outline . . . . . . . . . . . . . . . . . . . . . . . . . 9
13 Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . 13
14 Revision history. . . . . . . . . . . . . . . . . . . . . . . . 13
15 Legal information. . . . . . . . . . . . . . . . . . . . . . . 14
15.1 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 14
15.2 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
15.3 Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 14
15.4 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 15
16 Contact information. . . . . . . . . . . . . . . . . . . . . 15
17 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
© Nexperia B.V. 2017. All rights reserved
For more information, please visit: http://www.nexperia.com
For sales office addresses, please send an email to: salesaddresses@nexperia.com
Date of release:
27 November 2015