APX324TSG-13 Equivalent & Substitute Parts

Part Overview

The APX324TSG-13 is a general-purpose operational amplifier integrated circuit manufactured by Diodes Incorporated. This device features four independent amplifier circuits in a 14-TSSOP surface-mount package with rail-to-rail output capability. The part is currently in active production status with 72,900 units in stock.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be achieved within the specified parameter ranges. Alternative models may be required due to supply constraints, design optimization, or application-specific performance requirements while maintaining functional compatibility in the target circuit.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	APX324TSG-13	—
Manufacturer	Diodes Incorporated	—
Category	Linear, Amplifiers	—
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Output Type	Rail-to-Rail	—
Package / Case	14-TSSOP (0.173", 4.40mm Width)	—
Mounting Type	Surface Mount	—
Voltage - Supply Span (Min)	2.5	V
Voltage - Supply Span (Max)	5.5	V
Gain Bandwidth Product	1	MHz
Slew Rate	1	V/µs
Current - Input Bias	10	nA
Voltage - Input Offset	1.7	mV
Current - Supply (x4 Channels)	340	µA
Current - Output / Channel	90	mA
Operating Temperature	-40 to 85	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	3 (168 Hours)	—
Product Status	Active	—

Substitute Part Grouping Explanation

Substitute parts for the APX324TSG-13 are qualified based on the following critical parameters:

Mechanical Compatibility:

Package type: 14-TSSOP surface-mount package (0.173", 4.40mm width)
Mounting type: Surface mount

Electrical Compatibility:

Number of circuits: 4 independent amplifier channels
Output type: Rail-to-Rail configuration
Amplifier classification: General Purpose operational amplifier
Supply voltage range: Minimum 2.5V to maximum 5.5V (substitute must support this range or broader)
Gain bandwidth product: 1 MHz nominal (substitutes within 0.6 to 1.5 MHz acceptable)
Slew rate: 1 V/µs nominal (substitutes from 0.42 to 1 V/µs acceptable)
Input bias current: 10 nA nominal (substitutes from 1 pA to 27 nA acceptable)
Input offset voltage: 1.7 mV nominal (substitutes from 100 µV to 4.5 mV acceptable)
Output current per channel: 90 mA nominal (substitutes from 23 to 160 mA acceptable)

Compliance & Regulatory:

RoHS3 compliance required
REACH unaffected status required
Active product status required

Substitutes are grouped into two categories: direct pin-compatible replacements in 14-TSSOP packaging, and functionally equivalent alternatives with different package options (14-SO) where mechanical constraints permit.

Parameter Comparison

Parameter	APX324TSG-13	ADA4891-4WARUZ-R7	LMV324IPT	LMV324IYPT	LMV324LIDT	LMV324QPWR	LMV614MT/NOPB	LMX324IPT	MCP6004-E/ST	MCP6004-I/ST	MCP6004T-E/ST
Manufacturer	Diodes Inc.	Analog Devices	STMicroelectronics	STMicroelectronics	STMicroelectronics	Texas Instruments	Texas Instruments	STMicroelectronics	Microchip	Microchip	Microchip
Amplifier Type	General Purpose	CMOS	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	4	4	4	4	4	4	4	4	4	4	4
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Package / Case	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP	14-SOIC	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP
Voltage - Supply Span (Min)	2.5 V	2.7 V	2.7 V	2.7 V	2.7 V	2.7 V	1.8 V	2.3 V	1.8 V	1.8 V	1.8 V
Voltage - Supply Span (Max)	5.5 V	5.5 V	6 V	6 V	5.5 V	5.5 V	5.5 V	5.5 V	6 V	6 V	6 V
Gain Bandwidth Product	1 MHz	105 MHz	1.3 MHz	1.3 MHz	1.3 MHz	1 MHz	1.5 MHz	1.3 MHz	1 MHz	1 MHz	1 MHz
Slew Rate	1 V/µs	170 V/µs	0.45 V/µs	0.45 V/µs	0.7 V/µs	1 V/µs	0.42 V/µs	0.7 V/µs	0.6 V/µs	0.6 V/µs	0.6 V/µs
Current - Input Bias	10 nA	2 pA	16 nA	16 nA	27 nA	15 nA	14 nA	27 nA	1 pA	1 pA	1 pA
Voltage - Input Offset	1.7 mV	2.5 mV	100 µV	100 µV	1 mV	1.7 mV	1 mV	4 mV	4.5 mV	4.5 mV	4.5 mV
Current - Supply (x4 Channels)	340 µA	4.4 mA	162 µA	162 µA	130 µA	410 µA	116 µA	130 µA	100 µA	100 µA	100 µA
Current - Output / Channel	90 mA	125 mA	160 mA	160 mA	70 mA	40 mA	100 mA	70 mA	23 mA	23 mA	23 mA
Operating Temperature	-40 to 85°C	-40 to 125°C	-40 to 125°C	-40 to 125°C	-40 to 125°C	-40 to 125°C	-40 to 125°C	-40 to 125°C	-40 to 125°C	-40 to 85°C	-40 to 125°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	2 (1 Year)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Pin-Compatible Substitutes (14-TSSOP Package):

The following parts maintain identical 14-TSSOP packaging and are directly substitutable at the PCB level:

LMV324QPWR (Texas Instruments) provides the closest electrical match to the APX324TSG-13, with identical gain bandwidth product (1 MHz) and slew rate (1 V/µs). This part extends the operating temperature range to 125°C and maintains all supply voltage specifications. Moisture sensitivity is rated MSL 2, which is superior to the original MSL 3 rating.

MCP6004T-E/ST (Microchip Technology) offers extended supply voltage range (1.8V to 6V) and superior input bias current performance (1 pA). The gain bandwidth product (1 MHz) and slew rate (0.6 V/µs) remain within acceptable operating parameters. This part features MSL 1 rating and 35,100 units in stock.

LMV324IPT (STMicroelectronics) provides extended operating temperature range (-40°C to 125°C) with comparable electrical performance. Input offset voltage is significantly improved (100 µV vs. 1.7 mV). Supply voltage range extends to 6V maximum.

LMX324IPT (STMicroelectronics) supports extended minimum supply voltage (2.3V) and maintains electrical performance within specification. This part is suitable for low-voltage applications while maintaining 14-TSSOP compatibility.

Alternative Package Option (14-SOIC):

LMV324LIDT (STMicroelectronics) provides equivalent electrical performance in a 14-SOIC package (0.154", 3.90mm width). This option is suitable only if PCB layout permits the larger package footprint. Inventory availability is significantly higher (500,400 units).

Automotive-Grade Option:

LMV324IYPT (STMicroelectronics) is qualified to AEC-Q100 automotive standards with identical electrical specifications to LMV324IPT. This part is required for automotive applications where qualification is mandatory.

High-Performance Alternative:

ADA4891-4WARUZ-R7 (Analog Devices) offers significantly enhanced performance with 105 MHz gain bandwidth product and 170 V/µs slew rate. This part is suitable only for applications requiring higher bandwidth and faster transient response. MSL rating is superior (MSL 1). Note: This substitution introduces substantially different electrical characteristics and requires circuit validation.

Low-Power Alternative:

LMV614MT/NOPB (Texas Instruments) provides the lowest supply current (116 µA for four channels) and extends minimum supply voltage to 1.8V. This part is optimal for battery-powered or ultra-low-power applications. Gain bandwidth product (1.5 MHz) and slew rate (0.42 V/µs) remain within acceptable ranges.

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status. All parts are in active production status.

Frequently Asked Questions (FAQ)

Q: Can the ADA4891-4WARUZ-R7 be used as a direct replacement for the APX324TSG-13?

A: The ADA4891-4WARUZ-R7 is pin-compatible in the 14-TSSOP package and maintains the four-circuit rail-to-rail configuration. However, this part exhibits substantially different electrical characteristics: gain bandwidth product of 105 MHz (versus 1 MHz), slew rate of 170 V/µs (versus 1 V/µs), and input bias current of 2 pA (versus 10 nA). Circuit validation is required to confirm performance compatibility in the target application.

Q: What is the difference between MCP6004-E/ST, MCP6004-I/ST, and MCP6004T-E/ST?

A: These three Microchip parts share identical electrical specifications but differ in packaging and temperature rating. MCP6004-E/ST is supplied in Tube packaging with -40°C to 125°C operating range. MCP6004-I/ST is also in Tube packaging but with -40°C to 85°C operating range. MCP6004T-E/ST is supplied in Cut Tape (CT) & Digi-Reel® packaging with -40°C to 125°C operating range. All three maintain 14-TSSOP package compatibility.

Q: Is the LMV324LIDT suitable for direct PCB replacement?

A: The LMV324LIDT uses a 14-SOIC package (0.154", 3.90mm width) instead of the 14-TSSOP package (0.173", 4.40mm width). While pin-compatible electrically, the physical footprint is different. This part is suitable only if the PCB layout has been redesigned to accommodate the SOIC package or if the original design includes provisions for both package types.

Q: Which substitute offers the best moisture sensitivity rating?

A: Multiple substitutes offer MSL 1 (Unlimited) rating, which is superior to the original APX324TSG-13 MSL 3 (168 Hours) rating. These include ADA4891-4WARUZ-R7, LMV324IPT, LMV324IYPT, LMV324LIDT, LMV614MT/NOPB, LMX324IPT, and all three MCP6004 variants. MSL 1 rating eliminates moisture sensitivity constraints during storage and handling.

Q: Can I use LMV324IYPT in non-automotive applications?

A: Yes. The LMV324IYPT is qualified to AEC-Q100 automotive standards but is functionally identical to the standard LMV324IPT. Automotive qualification does not restrict use in non-automotive applications. This part is suitable for any application requiring the specified electrical performance.

Q: What is the primary advantage of LMV614MT/NOPB?

A: The LMV614MT/NOPB provides the lowest supply current consumption (116 µA for four channels) and extends the minimum supply voltage to 1.8V. This part is optimized for battery-powered applications and ultra-low-power designs where supply current is a critical design constraint.

Q: Are all substitute parts available in the same packaging format as the original?

A: Most substitutes are available in 14-TSSOP packaging, which is directly compatible with the APX324TSG-13 footprint. The exception is LMV324LIDT, which uses 14-SOIC packaging. All other recommended substitutes maintain identical 14-TSSOP package dimensions (0.173", 4.40mm width).

Q: What is the supply voltage compatibility range for substitutes?

A: The APX324TSG-13 operates from 2.5V to 5.5V. Most substitutes support this range or broader ranges. LMV614MT/NOPB and MCP6004 variants extend the minimum to 1.8V. LMV324IPT, LMV324IYPT, and MCP6004 variants extend the maximum to 6V. LMX324IPT supports 2.3V minimum. All substitutes maintain the 5.5V maximum or higher.

Q: Which substitute has the highest output current capability?

A: LMV324IPT and LMV324IYPT both provide 160 mA output current per channel, which is the highest among all substitutes. The original APX324TSG-13 provides 90 mA per channel. This increased capability is beneficial for applications requiring higher load drive capability.

Q: Can I substitute based on gain bandwidth product alone?

A: No. Gain bandwidth product is one of several critical parameters. Substitution requires compatibility across multiple parameters including supply voltage range, slew rate, input bias current, input offset voltage, output current capability, operating temperature range, and package type. All parameters must fall within acceptable ranges for the target application.

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