AS1909C16-T Equivalent & Substitute Parts

Part Overview

The AS1909C16-T is a single-channel power supply supervisor IC manufactured by ams-OSRAM USA INC. in SOT-23-3 surface mount packaging. This device functions as a simple reset/power-on reset circuit with open drain or open collector output, monitoring a single voltage threshold at 1.6V. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Category	Power Management (PMIC)
Type	Simple Reset/Power-On Reset
Number of Voltages Monitored	1
Voltage - Threshold	1.6V
Output Configuration	Open Drain or Open Collector
Reset Logic	Active Low
Reset Timeout	100ms Minimum
Operating Temperature Range	-40°C ~ 125°C (TA)
Mounting Type	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the AS1909C16-T is determined by strict equivalence across the following critical parameters:

Functional Parameters:

Single voltage monitoring channel
1.6V threshold voltage
Open drain or open collector output topology
Active low reset logic
100ms minimum reset timeout

Physical & Environmental Parameters:

SOT-23-3 package compatibility
Surface mount mounting type
Operating temperature range -40°C ~ 125°C
Moisture sensitivity level 1 (unlimited)

Regulatory & Compliance Parameters:

REACH unaffected status
EAR99 ECCN classification
HTSUS code 8542.39.0001

The MAX6334UR16D3+T meets all specified parameters and qualifies as a parametric equivalent substitute.

Parameter Comparison

Parameter	AS1909C16-T (Main Part)	MAX6334UR16D3+T (Substitute)
Manufacturer	ams-OSRAM USA INC.	Analog Devices Inc./Maxim Integrated
Product Status	Obsolete	Active
Category	Power Management (PMIC)	Power Management (PMIC)
Type	Simple Reset/Power-On Reset	Simple Reset/Power-On Reset
Number of Voltages Monitored	1	1
Voltage - Threshold	1.6V	1.6V
Output Configuration	Open Drain or Open Collector	Open Drain or Open Collector
Reset Logic	Active Low	Active Low
Reset Timeout	100ms Minimum	100ms Minimum
Operating Temperature Range	-40°C ~ 125°C (TA)	-40°C ~ 125°C (TA)
Mounting Type	Surface Mount	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
Supplier Device Package	SOT-23-3	SOT-23-3
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99
HTSUS	8542.39.0001	8542.39.0001
Packaging Format	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)
RoHS Status	Not specified	ROHS3 Compliant

Engineering Selection Recommendations

The MAX6334UR16D3+T is the qualified parametric equivalent for the obsolete AS1909C16-T. Selection of this substitute is supported by:

Product Status Advantage: The MAX6334UR16D3+T maintains active product status with Analog Devices Inc./Maxim Integrated, ensuring long-term availability and supply chain continuity compared to the obsolete AS1909C16-T.

Functional Equivalence: All critical electrical parameters match exactly, including voltage threshold (1.6V), output configuration (open drain/open collector), reset logic (active low), and reset timeout (100ms minimum).

Package Compatibility: Both parts utilize identical SOT-23-3 surface mount packaging, enabling direct PCB layout compatibility without redesign.

Environmental & Compliance Alignment: Operating temperature range, moisture sensitivity level, REACH status, ECCN classification, and HTSUS coding are identical across both parts.

Enhanced Compliance: The MAX6334UR16D3+T carries ROHS3 compliance certification, providing additional regulatory alignment for modern manufacturing standards.

Frequently Asked Questions (FAQ)

Q: Can the MAX6334UR16D3+T be used as a direct replacement for the AS1909C16-T?

A: Yes. The MAX6334UR16D3+T meets all specified electrical and mechanical parameters. Both parts feature identical 1.6V threshold voltage, open drain/open collector output, active low reset logic, 100ms minimum reset timeout, and SOT-23-3 packaging. Direct PCB substitution is supported without circuit modification.

Q: What is the primary reason for substituting the AS1909C16-T?

A: The AS1909C16-T is classified as obsolete. The MAX6334UR16D3+T is an active product from Analog Devices Inc./Maxim Integrated, ensuring ongoing availability and supply chain support.

Q: Are there packaging differences between these parts?

A: Both parts use SOT-23-3 surface mount packaging. The AS1909C16-T is supplied in Cut Tape (CT) & Digi-Reel® format, while the MAX6334UR16D3+T is supplied in Tape & Reel (TR) format. This difference affects procurement and handling but does not impact electrical or mechanical compatibility.

Q: Do both parts operate across the same temperature range?

A: Yes. Both the AS1909C16-T and MAX6334UR16D3+T operate across -40°C to 125°C (TA), supporting identical thermal specifications for industrial and extended temperature applications.

Q: Is the MAX6334UR16D3+T RoHS compliant?

A: The MAX6334UR16D3+T carries ROHS3 compliance certification. RoHS status for the AS1909C16-T was not specified in the provided data.

Q: What is the moisture sensitivity level for both parts?

A: Both parts carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions during storage or handling.

Q: Are regulatory classifications identical?

A: Yes. Both parts share identical REACH unaffected status, EAR99 ECCN classification, and HTSUS code 8542.39.0001.

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