MAX989ESA Equivalent & Substitute Parts

Part Overview

The MAX989ESA is a dual-channel general-purpose comparator manufactured by Analog Devices Inc./Maxim Integrated, housed in an 8-SOIC surface-mount package. This device features CMOS push-pull rail-to-rail TTL output architecture with a supply voltage range of 2.5V to 5.5V (single) or ±1.25V to 2.75V (dual). The MAX989ESA is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. Substitute parts must maintain functional compatibility across key electrical parameters including supply voltage, input offset voltage, propagation delay, and output characteristics while accommodating modern RoHS3 compliance requirements.

Key Parameters

Parameter	MAX989ESA	Unit
Number of Elements	2	Channels
Output Type	CMOS, Push-Pull, Rail-to-Rail, TTL	—
Voltage - Supply, Single/Dual (±)	2.5V ~ 5.5V, ±1.25V ~ 2.75V	V
Voltage - Input Offset (Max)	5	mV @ 5.5V
Current - Input Bias (Max)	1	pA @ 5.5V
Current - Quiescent (Max)	24	µA
CMRR, PSRR (Typ)	80dB CMRR, 80dB PSRR	dB
Propagation Delay (Max)	450	ns
Hysteresis	±3	mV
Operating Temperature	-40°C ~ 85°C	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	RoHS non-compliant	—

Substitute Part Grouping Explanation

Substitution of the MAX989ESA is determined by strict alignment of electrical and mechanical parameters. The primary substitution criteria are:

Critical Parameters for Direct Substitution:

Dual-channel configuration (2 elements)
Supply voltage range compatibility (minimum 2.5V single supply or ±1.25V dual supply)
Output type (CMOS push-pull or rail-to-rail TTL capable)
Input offset voltage ≤ 5mV
Propagation delay ≤ 450ns
8-SOIC package form factor
Surface-mount technology

Substitution Categories:

Direct Manufacturer Equivalent: MAX989ESA+ maintains identical electrical specifications and packaging. The primary distinction is product status (Active vs. Obsolete) and RoHS3 compliance, making it the preferred direct replacement.

Parametric Equivalent: MAX985ESA+ shares identical electrical characteristics but contains a single comparator element instead of two. This part is suitable only for applications requiring single-channel operation.

Manufacturer-Recommended Alternatives: ADCMP392ARZ, ADCMP392ARZ-RL7, ALD2302ASAL, ALD2302SAL, BU7232F-E2, BU7232SF-E2, BU7252SF-E2, and HA1631D01MMEL-E meet the core functional requirements but exhibit variations in secondary parameters such as input bias current, quiescent current, propagation delay, and operating temperature range. These parts are suitable where the specific parameter variations do not conflict with application requirements.

Parameter Comparison

Part Number	Manufacturer	Elements	Output Type	Supply Voltage (V)	Input Offset (mV)	Prop. Delay (ns/µs)	Quiescent Current (µA)	Temp Range (°C)	Package	Status	RoHS
MAX989ESA	Analog Devices/Maxim	2	CMOS, Push-Pull, Rail-to-Rail, TTL	2.5–5.5, ±1.25–2.75	5 @ 5.5V	450	24	-40 to 85	8-SOIC	Obsolete	Non-compliant
MAX989ESA+	Analog Devices/Maxim	2	CMOS, Push-Pull, Rail-to-Rail, TTL	2.5–5.5, ±1.25–2.75	5 @ 5.5V	450	24	-40 to 85	8-SOIC	Active	ROHS3
MAX985ESA+	Analog Devices/Maxim	1	CMOS, Push-Pull, Rail-to-Rail, TTL	2.5–5.5, ±1.25–2.75	5 @ 5.5V	450	24	-40 to 85	8-SOIC	Active	ROHS3
ADCMP392ARZ	Analog Devices	2	Rail-to-Rail	2.3–5.5	5	9.7	29.3	-40 to 125	8-SOIC	Active	ROHS3
ADCMP392ARZ-RL7	Analog Devices	2	Rail-to-Rail	2.3–5.5	5	9.7	29.3	-40 to 125	8-SOIC	Active	ROHS3
ALD2302ASAL	Advanced Linear Devices	2	CMOS, NMOS, Push-Pull, TTL	4–10, ±2–5	1 @ 5V	—	500	0 to 70	8-SOIC	Active	ROHS3
ALD2302SAL	Advanced Linear Devices	2	CMOS, NMOS, Push-Pull, TTL	4–10, ±2–5	4 @ 5V	—	500	0 to 70	8-SOIC	Active	ROHS3
BU7232F-E2	Rohm Semiconductor	2	Push-Pull	1.8–5.5, ±0.9–2.75	11 @ 3V	1700	25	-40 to 85	8-SOP	Active	ROHS3
BU7232SF-E2	Rohm Semiconductor	2	Push-Pull	1.8–5.5, ±0.9–2.75	11 @ 3V	1700	25	-40 to 105	8-SOP	Active	ROHS3
BU7252SF-E2	Rohm Semiconductor	2	Push-Pull	1.8–5.5, ±0.9–2.75	11 @ 3V	550	65	-40 to 105	8-SOP	Active	ROHS3
HA1631D01MMEL-E	Renesas Electronics	2	Open-Drain, Push-Pull	1.8–5.5	5	—	20	-40 to 85	8-TSSOP	Active	ROHS3

Engineering Selection Recommendations

Preferred Direct Replacement: MAX989ESA+ is the optimal choice for direct substitution. It maintains 100% electrical and mechanical compatibility with the obsolete MAX989ESA while offering Active product status and ROHS3 compliance. This eliminates design re-qualification and ensures supply continuity.

Single-Channel Applications: MAX985ESA+ is suitable for designs requiring only one comparator channel. Electrical specifications remain identical to MAX989ESA, with the same Active status and ROHS3 compliance.

Extended Temperature Range Requirement: ADCMP392ARZ and ADCMP392ARZ-RL7 extend the operating temperature range to -40°C to 125°C. These parts maintain dual-channel configuration and 8-SOIC packaging. Trade-offs include slower propagation delay (9.7µs vs. 450ns) and slightly higher quiescent current (29.3µA vs. 24µA). Selection is appropriate only when extended temperature operation is mandatory and propagation delay tolerance permits.

Lower Supply Voltage Applications (1.8V): BU7232F-E2, BU7232SF-E2, and BU7252SF-E2 support lower minimum supply voltage (1.8V vs. 2.5V). BU7252SF-E2 offers faster propagation delay (550ns) compared to BU7232 variants (1.7µs). Package is 8-SOP rather than 8-SOIC. Input offset voltage is higher (11mV vs. 5mV). These parts are suitable for low-voltage applications where package footprint compatibility can be accommodated.

Higher Supply Voltage Applications (up to 10V): ALD2302ASAL and ALD2302SAL support supply voltages up to 10V (±5V dual). Operating temperature range is limited to 0°C to 70°C. Quiescent current is significantly higher (500µA vs. 24µA). These parts are suitable only for applications requiring higher supply voltages where the thermal and power budget constraints are acceptable.

Minimal Quiescent Current Requirement: HA1631D01MMEL-E offers the lowest quiescent current (20µA) among alternatives. Output type includes open-drain capability. Package is 8-TSSOP (smaller footprint than 8-SOIC). This part is suitable for ultra-low-power applications where package size reduction and minimal standby current are priorities.

All recommended substitutes carry ROHS3 compliance and Active product status, ensuring long-term supply availability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can MAX989ESA+ be used as a direct drop-in replacement for MAX989ESA?

A: Yes. MAX989ESA+ is electrically and mechanically identical to MAX989ESA. The only differences are product status (Active vs. Obsolete) and RoHS compliance (ROHS3 vs. non-compliant). No design changes are required.

Q: What is the key difference between MAX989ESA and MAX985ESA+?

A: MAX985ESA+ contains a single comparator element, while MAX989ESA contains two. All other electrical specifications are identical. Use MAX985ESA+ only in single-channel applications.

Q: Why is ADCMP392ARZ slower than MAX989ESA?

A: ADCMP392ARZ has a propagation delay of 9.7µs compared to MAX989ESA's 450ns. This is a fundamental design difference between the two architectures. ADCMP392ARZ is suitable only for applications where propagation delay tolerance permits.

Q: Can I use BU7232SF-E2 in place of MAX989ESA?

A: BU7232SF-E2 is functionally compatible but has trade-offs: lower minimum supply voltage (1.8V), higher input offset voltage (11mV vs. 5mV), slower propagation delay (1.7µs vs. 450ns), and different package (8-SOP vs. 8-SOIC). Use only if these variations are acceptable for your application.

Q: What is the operating temperature range difference between MAX989ESA and ADCMP392ARZ?

A: MAX989ESA operates from -40°C to 85°C. ADCMP392ARZ extends to -40°C to 125°C. Select ADCMP392ARZ only if the extended upper temperature limit is required.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitute parts carry ROHS3 compliance. The original MAX989ESA is RoHS non-compliant, making RoHS3-compliant substitutes necessary for new designs subject to RoHS regulations.

Q: Can ALD2302ASAL operate at 2.5V supply voltage?

A: No. ALD2302ASAL requires a minimum supply voltage of 4V (or ±2V dual). It is not suitable for 2.5V single-supply applications.

Q: What is the package difference between 8-SOIC and 8-SOP?

A: Both are 8-pin surface-mount packages with similar footprints. 8-SOIC has a width of 0.154" (3.90mm), while 8-SOP has a width of 0.173" (4.40mm). PCB layout modifications may be required when switching between these packages.

Q: Which substitute offers the lowest quiescent current?

A: HA1631D01MMEL-E offers the lowest quiescent current at 20µA, compared to MAX989ESA's 24µA. This part is suitable for ultra-low-power applications.

Q: Is HA1631D01MMEL-E compatible with MAX989ESA in all applications?

A: HA1631D01MMEL-E has open-drain output capability in addition to push-pull, operates at lower minimum supply voltage (1.8V), and uses 8-TSSOP packaging instead of 8-SOIC. Verify output type compatibility and package footprint before substitution.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message