DM74ALS245ASJX Equivalent & Substitute Parts

Part Overview

The DM74ALS245ASJX is a non-inverting transceiver logic IC manufactured by onsemi, featuring 1 element with 8 bits per element and 3-state output capability. This component operates within a 4.5V to 5.5V supply voltage range and is housed in a 20-SOP package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	DM74ALS245ASJX
Manufacturer	onsemi
Series	74ALS
Logic Type	Transceiver, Non-Inverting
Number of Elements	1
Number of Bits per Element	8
Output Type	3-State
Current - Output High, Low	15mA, 24mA
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C (TA)
Mounting Type	Surface Mount
Package / Case	20-SOIC (0.209", 5.30mm Width)
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution of the DM74ALS245ASJX is determined by strict equivalence across the following critical parameters:

Logic Type: Transceiver, Non-Inverting
Number of Elements: 1
Number of Bits per Element: 8
Output Type: 3-State
Current - Output High, Low: 15mA, 24mA
Voltage - Supply: 4.5V ~ 5.5V
Operating Temperature: 0°C ~ 70°C (TA)
Series: 74ALS
Mounting Type: Surface Mount

Substitute parts are grouped into two categories based on package configuration:

Category 1: Direct Package Match (20-SOIC, 0.295" Width) Parts SN74ALS245A-1DW, SN74ALS245A-1DWR, SN74ALS245ADW, and SN74ALS245ADWR maintain identical electrical specifications and differ only in packaging format (tube, tape & reel, or cut tape).

Category 2: Parametric Equivalents (20-SOIC, 0.209" Width) Parts SN74ALS245A-1NSR, SN74ALS245ANSR, SN74ALS623ANSR, SN74ALS645A-1NSR, and SN74ALS645ANSR share all critical electrical parameters but utilize different package designations (20-SO vs. 20-SOP).

Parameter Comparison

Parameter	DM74ALS245ASJX	SN74ALS245A-1DW	SN74ALS245A-1DWR	SN74ALS245ADW	SN74ALS245ADWR	SN74ALS245A-1NSR	SN74ALS245ANSR	SN74ALS623ANSR	SN74ALS645A-1NSR	SN74ALS645ANSR
Manufacturer	onsemi	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Series	74ALS	74ALS	74ALS	74ALS	74ALS	74ALS	74ALS	74ALS	74ALS	74ALS
Logic Type	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting
Number of Elements	1	1	1	1	1	1	1	1	1	1
Number of Bits per Element	8	8	8	8	8	8	8	8	8	8
Output Type	3-State	3-State	3-State	3-State	3-State	3-State	3-State	3-State	3-State	3-State
Current - Output High, Low	15mA, 24mA	15mA, 24mA	15mA, 24mA	15mA, 24mA	15mA, 24mA	15mA, 24mA	15mA, 24mA	15mA, 24mA	15mA, 24mA	15mA, 24mA
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	20-SOIC (0.209", 5.30mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.209", 5.30mm Width)	20-SOIC (0.209", 5.30mm Width)	20-SOIC (0.209", 5.30mm Width)	20-SOIC (0.209", 5.30mm Width)	20-SOIC (0.209", 5.30mm Width)
Product Status	Obsolete	Last Time Buy	Active	Last Time Buy	Active	Active	Active	Active	Active	Active
RoHS Status	Not Specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

For designs currently utilizing the DM74ALS245ASJX, Texas Instruments 74ALS series alternatives provide full functional equivalence with improved product lifecycle status.

For applications requiring identical package dimensions (20-SOIC, 0.209" width): Select SN74ALS245A-1NSR, SN74ALS245ANSR, SN74ALS623ANSR, SN74ALS645A-1NSR, or SN74ALS645ANSR. All are classified as Active products with ROHS3 compliance, ensuring long-term availability and regulatory alignment.

For applications permitting package footprint variation (20-SOIC, 0.295" width): SN74ALS245A-1DWR and SN74ALS245ADWR offer Active product status with ROHS3 compliance. SN74ALS245A-1DW and SN74ALS245ADW are available as Last Time Buy alternatives.

All substitute parts maintain identical electrical performance across output current, supply voltage, and operating temperature specifications. Selection should prioritize Active status parts for new designs and long-term production continuity.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS245A-1DW be used as a direct replacement for DM74ALS245ASJX? A: SN74ALS245A-1DW is electrically equivalent but features a different package width (0.295" versus 0.209"). PCB layout compatibility must be verified before substitution. The part is classified as Last Time Buy, limiting future availability.

Q: What is the difference between 20-SOIC and 20-SO package designations? A: Both designations refer to 20-pin small-outline integrated circuit packages. The primary distinction lies in physical dimensions: the DM74ALS245ASJX uses 20-SOP (0.209" width), while many Texas Instruments alternatives use 20-SOIC (0.295" width) or 20-SO (0.209" width). Pin pitch and electrical characteristics remain identical.

Q: Are all substitute parts RoHS compliant? A: All Texas Instruments substitute parts listed are ROHS3 compliant. The original onsemi DM74ALS245ASJX RoHS status is not specified in available documentation.

Q: Which substitute part offers the longest product lifecycle? A: SN74ALS245A-1DWR, SN74ALS245ADWR, SN74ALS245A-1NSR, SN74ALS245ANSR, SN74ALS623ANSR, SN74ALS645A-1NSR, and SN74ALS645ANSR are all classified as Active products, indicating ongoing manufacturer support and availability.

Q: Can SN74ALS623ANSR be used interchangeably with SN74ALS245ANSR? A: Both parts share identical electrical specifications and package dimensions. The base product numbers differ (74ALS623 versus 74ALS245), but functional equivalence is maintained across all critical parameters. Application-specific requirements should determine final selection.

Q: What packaging formats are available for substitute parts? A: Substitute parts are available in Tube, Tape & Reel (TR), and Cut Tape (CT) & Digi-Reel formats. Selection depends on production volume and assembly process requirements.

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