74AHC273; 74AHCT273

Octal D-type flip-flop with reset; positive-edge trigger

The 74AHC273; 74AHCT273 is an octal positive-edge triggered D-type flip-flop. The device features clock (CP) and master reset (MR) inputs. The outputs Qn will assume the state of their corresponding D inputs that meet the set-up and hold time requirements on the LOW-to-HIGH clock (CP) transition. A LOW on MR forces the outputs LOW independently of clock and data inputs. Inputs are overvoltage tolerant. This feature allows the use of these devices as translators in mixed voltage environments.

Features and benefits

Wide supply voltage range from 2.0 to 5.5 V
Overvoltage tolerant inputs to 5.5 V
High noise immunity
CMOS low power dissipation
Balanced propagation delays
All inputs have Schmitt-trigger actions
Ideal buffer for MOS microcontroller or memory
Common clock and master reset
Latch-up performance exceeds 100 mA per JESD 78 Class II Level A
Input levels:
- For 74AHC273: CMOS level
- For 74AHCT273: TTL level
ESD protection:
- HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V
- CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V
Multiple package options
Specified from -40 °C to +85 °C and from -40 °C to +125 °C

Parametrics

Type number	Product status	V_CC (V)	Logic switching levels	Output drive capability (mA)	t_pd (ns)	f_max (MHz)	Power dissipation considerations	T_amb (°C)	R_th(j-a) (K/W)	Ψ_th(j-top) (K/W)	R_th(j-c) (K/W)	Package name
74AHC273BQ	Production	2.0 - 5.5	CMOS	± 8	4.2	165	low	-40~125	78	9.1	50	DHVQFN20
74AHC273D	Production	2.0 - 5.5	CMOS	± 8	4.2	165	low	-40~125	85	27.3	61	SO20
74AHC273PW	Production	2.0 - 5.5	CMOS	± 8	4.2	165	low	-40~125	100	4.6	44.7	TSSOP20
74AHCT273BQ	Production	4.5 - 5.5	TTL	± 8	4.0	120	low	-40~125	78	9.1	50	DHVQFN20
74AHCT273D	Production	4.5 - 5.5	TTL	± 8	4.0	120	low	-40~125	85	27.3	61	SO20
74AHCT273PW	Production	4.5 - 5.5	TTL	± 8	4.0	120	low	-40~125	100	4.6	44.7	TSSOP20

Package

Type number	Package	Package information	Reflow-/Wave soldering	Packing	Status	Marking	Orderable part number, (Ordering code (12NC))
74AHC273BQ	DHVQFN20 (SOT764-1)	SOT764-1		SOT764-1_115	Active	AHC273	74AHC273BQ,115 ( 9352 730 49115 )
74AHC273D	SO20 (SOT163-1)	SOT163-1	WAVE_BG-BD-1	SOT163-1_118	Active	74AHC273D	74AHC273D,118 ( 9352 635 92118 )
74AHC273PW	TSSOP20 (SOT360-1)	SOT360-1	SSOP-TSSOP-VSO-WAVE	SOT360-1_118	Active	AHC273	74AHC273PW,118 ( 9352 635 93118 )
74AHCT273BQ	DHVQFN20 (SOT764-1)	SOT764-1		SOT764-1_115	Active	AHCT273	74AHCT273BQ,115 ( 9352 737 35115 )
74AHCT273D	SO20 (SOT163-1)	SOT163-1	WAVE_BG-BD-1	SOT163-1_118	Active	74AHCT273D	74AHCT273D,118 ( 9352 635 90118 )
74AHCT273PW	TSSOP20 (SOT360-1)	SOT360-1	SSOP-TSSOP-VSO-WAVE	SOT360-1_118	Active	AHCT273	74AHCT273PW,118 ( 9352 635 91118 )

Discontinuation information

Type number	Orderable part number, (Ordering code (12NC))	Last time buy date	Last time delivery date	Replacement product
74AHC273D	935263592112	2021-12-31	2022-06-30	74AHC273D
74AHC273PW	935263593112	2021-12-31	2022-06-30	74AHC273PW
74AHCT273D	935263590112	2018-12-31	2019-06-30	74AHCT273D
74AHCT273PW	935263591112	2018-12-31	2019-06-30	74AHCT273PW

Environmental information

Type number	Orderable part number	Chemical content	Leadfree conversion date
74AHC273BQ	74AHC273BQ,115	74AHC273BQ	Always Pb-free
74AHC273D	74AHC273D,118	74AHC273D	week 30, 2004
74AHC273PW	74AHC273PW,118	74AHC273PW	week 5, 2005
74AHCT273BQ	74AHCT273BQ,115	74AHCT273BQ	Always Pb-free
74AHCT273D	74AHCT273D,118	74AHCT273D	week 30, 2004
74AHCT273PW	74AHCT273PW,118	74AHCT273PW	week 7, 2005

Quality and reliability disclaimer

Documentation (8)

File name	Title	Type	Date
74AHC_AHCT273	Octal D-type flip-flop with reset; positive-edge trigger	Data sheet	2023-09-21
ahct273	ahct273 IBIS model	IBIS model	2013-04-07
ahc273	ahc273 IBIS model	IBIS model	2013-04-07
SOT764-1	plastic, leadless dual in-line compatible thermal enhanced very thin quad flat package; 20 terminals; 0.5 mm pitch; 4.5 mm x 2.5 mm x 1 mm body	Package information	2022-06-21
SSOP-TSSOP-VSO-WAVE	Footprint for wave soldering	Wave soldering	2009-10-08
SOT360-1	plastic, thin shrink small outline package; 20 leads; 0.65 mm pitch; 6.5 mm x 4.4 mm x 1.1 mm body	Package information	2022-06-21
SOT163-1	plastic, small outline package; 20 leads; 1.27 mm pitch; 12.8 mm x 7.5 mm x 2.65 mm body	Package information	2022-06-20
WAVE_BG-BD-1	Wave soldering profile	Wave soldering	2021-09-08

Support

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Models

File name	Title	Type	Date
ahct273	ahct273 IBIS model	IBIS model	2013-04-07
ahc273	ahc273 IBIS model	IBIS model	2013-04-07

Ordering, pricing & availability

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