74HC688D

8-bit magnitude comparator

The 74HC688 is an 8-bit magnitude comparator. It performs comparisons of two 8-bit binary or BCD words. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of V_CC.

8-bit magnitude comparator

Buy from Nexperia

SKU	Stock*	MOQ	Price per unit**	Quantity

Buy from distributors

Seller	SKU	Stock	MOQ		1	10	100	1,000	10,000	Purchase

Seller	SKU	Stock	MOQ		1	10	100	1,000	10,000	Purchase

Seller	SKU	Stock	MOQ		1	10	100	1,000	10,000	Purchase

Seller	SKU	Stock	MOQ		1	10	100	1,000	10,000	Purchase

* Stock values are subject to change
** Displayed price per unit is based on small quantity orders
*** Authorized resellers for overstock, mature, and discontinued products which are warranted for reliability by the reseller, no longer by Nexperia

Features and benefits

Compare two 8-bit words
Wide supply voltage range from 2.0 to 6.0 V
CMOS input levels
CMOS low power dissipation
High noise immunity
Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
Complies with JEDEC standards
- JESD8C (2.7 V to 3.6 V)
- JESD7A (2.0 V to 6.0 V)
ESD protection:
- HBM JESD22-A114-F exceeds 2000 V
- MM JESD22-A115-A exceeds 200 V
Specified from -40 °C to +85 °C and from -40 °C to +125 °C

Applications

Parametrics

Type number	Product status	V_CC (V)	Logic switching levels	Output drive capability (mA)	t_pd (ns)	Nr of bits	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
74HC688D	Production	2.0 - 6.0	CMOS	± 5.2	17	8	low	-40~125	82	24.3	58	SO20

Package

Type number	Orderable part number, (Ordering code (12NC))	Status	Marking	Package	Package information	Reflow-/Wave soldering	Packing
74HC688D	74HC688D,653 ( 9337 139 00653 )	Active	74HC688D	SO20 (SOT163-1)	SOT163-1	WAVE_BG-BD-1	Reel 13" Q1/T1 CECC

The variants in the table below are discontinued. See the table Discontinuation information for more information.

Type number	Orderable part number, (Ordering code (12NC))	Status	Marking	Package	Package information	Reflow-/Wave soldering	Packing
74HC688D	74HC688D,652 ( 9337 139 00652 )	Discontinued / End-of-life	74HC688D	SO20 (SOT163-1)	SOT163-1	WAVE_BG-BD-1	Bulk Pack, CECC

Discontinuation information

Type number	Orderable part number	Ordering code	Last time buy date	Last time delivery date	Replacement product	Status	Comments
74HC688D	74HC688D,652	933713900652	2021-12-31	2022-06-30	74HC688D	Version withdrawal

Quality, reliability & chemical content

Type number	Orderable part number	Chemical content	RoHS / RHF	MSL	MSL leadfree
74HC688D	74HC688D,653	74HC688D		1	1

The variants in the table below are discontinued. See the table Discontinuation information for more information.

Type number	Orderable part number	Chemical content	RoHS / RHF	MSL	MSL leadfree
74HC688D	74HC688D,652	74HC688D		1	1

Quality and reliability disclaimer

Series

74HC688 - 8-bit magnitude comparator

Documentation (6)

File name	Title	Type	Date
74HC688	8-bit magnitude comparator	Data sheet	2021-07-16
AN11044	Pin FMEA 74HC/74HCT family	Application note	2019-01-09
D12_PC_sch_ver2_0	-	Design support	1998-04-22
74HC688D_Nexperia_Product_Reliability	74HC688D Nexperia Product Reliability	Quality document	2022-05-04
HCT_USER_GUIDE	HC/T User Guide	User manual	1997-10-31
WAVE_BG-BD-1	Wave soldering profile	Wave soldering	2021-09-08

Support

If you are in need of design/technical support, let us know and fill in the answer form, we'll get back to you shortly.

Models

File name	Title	Type	Date
D12_PC_sch_ver2_0	-	Design support	1998-04-22

Ordering, pricing & availability

Type number	Orderable part number	Ordering code (12NC)	Packing	Packing quantity	Buy online
74HC688D	74HC688D,653	933713900653	Reel 13" Q1/T1 CECC	-	Order product

Sample

As a Nexperia customer you can order samples via our sales organization or directly via our Online Sample Store: https://extranet.nexperia.com.

Sample orders normally take 2-4 days for delivery.

If you do not have a direct account with Nexperia our network of global and regional distributors is available and equipped to support you with Nexperia samples.