NDQ46PFI-7NET Equivalent & Substitute Parts

Part Overview

The NDQ46PFI-7NET is a DDR4 4Gbit SDRAM memory IC manufactured by Insignis Technology Corporation. This volatile memory device operates at 1.333 GHz with an 18 ns access time and is housed in a 96-FBGA (7.5x13mm) surface mount package. The part is currently in active production status with 765 units available in inventory.

Substitute parts are identified when alternative manufacturers produce memory ICs with identical electrical specifications, mechanical packaging, and compliance certifications. This ensures functional interchangeability in system designs without requiring circuit modifications or re-qualification.

Key Parameters

Parameter	Specification
Memory Type	Volatile DRAM
Technology	SDRAM - DDR4
Memory Size	4Gbit
Memory Organization	256M x 16
Memory Interface	POD
Clock Frequency	1.333 GHz
Access Time	18 ns
Write Cycle Time	15 ns
Voltage Supply	1.14V ~ 1.26V
Operating Temperature	0°C ~ 95°C (TC)
Package Type	96-TFBGA (7.5x13mm)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	MSL 3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for DDR4 SDRAM memory ICs is determined by strict equivalence across the following critical parameters:

Memory Specifications: Memory size (4Gbit), organization (256M x 16), technology (SDRAM - DDR4), and interface type (POD) must be identical.

Electrical Characteristics: Clock frequency (1.333 GHz), access time (18 ns), write cycle time (15 ns), and supply voltage range (1.14V ~ 1.26V) must match exactly.

Thermal Performance: Operating temperature range (0°C ~ 95°C) must be equivalent or exceed the main part requirements.

Mechanical Compatibility: Package type (96-TFBGA), physical dimensions (7.5x13mm), and surface mount mounting type must be identical.

Compliance & Certification: RoHS3 compliance and MSL rating (3, 168 Hours) must be maintained.

The substitute part AS4C256M16D4A-75BCN from Alliance Memory, Inc. meets all these criteria and is therefore electrically and mechanically interchangeable with the NDQ46PFI-7NET.

Parameter Comparison

Parameter	NDQ46PFI-7NET (Insignis)	AS4C256M16D4A-75BCN (Alliance Memory)	Match Status
Memory Type	Volatile DRAM	Volatile DRAM	Identical
Technology	SDRAM - DDR4	SDRAM - DDR4	Identical
Memory Size	4Gbit	4Gbit	Identical
Memory Organization	256M x 16	256M x 16	Identical
Memory Interface	POD	POD	Identical
Clock Frequency	1.333 GHz	1.333 GHz	Identical
Access Time	18 ns	18 ns	Identical
Write Cycle Time	15 ns	15 ns	Identical
Voltage Supply	1.14V ~ 1.26V	1.14V ~ 1.26V	Identical
Operating Temperature	0°C ~ 95°C (TC)	0°C ~ 95°C (TC)	Identical
Package Type	96-TFBGA (7.5x13mm)	96-TFBGA (7.5x13mm)	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
Moisture Sensitivity Level	MSL 3 (168 Hours)	MSL 3 (168 Hours)	Identical

Engineering Selection Recommendations

Primary Part (NDQ46PFI-7NET): Active production status with 765 units in stock. ROHS3 compliant. Suitable for immediate deployment in applications requiring DDR4 4Gbit SDRAM memory.

Substitute Part (AS4C256M16D4A-75BCN): Active production status with 1998 units in stock. ROHS3 compliant with additional REACH Unaffected and EAR99 ECCN certifications. Higher inventory availability supports extended production runs and supply chain continuity.

Both parts are functionally equivalent and maintain identical electrical, thermal, and mechanical specifications. Selection between them should be based on inventory availability, lead time requirements, and supply chain logistics rather than technical performance differences.

Frequently Asked Questions (FAQ)

Q: Can AS4C256M16D4A-75BCN be used as a direct replacement for NDQ46PFI-7NET without circuit modifications?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters including memory organization, clock frequency, access time, voltage supply, operating temperature range, and package dimensions. No circuit modifications are required.

Q: Are the package dimensions identical between these two parts?

A: Yes. Both parts use the 96-TFBGA package with dimensions of 7.5x13mm. Pin configuration and footprint are identical, enabling direct PCB-level substitution.

Q: Do both parts meet the same compliance standards?

A: Yes. Both NDQ46PFI-7NET and AS4C256M16D4A-75BCN are ROHS3 compliant with MSL 3 (168 Hours) moisture sensitivity rating. The Alliance Memory part includes additional REACH Unaffected status and EAR99 ECCN classification.

Q: What is the significance of the POD memory interface specification?

A: POD (Pseudo Open Drain) is the interface standard for these DDR4 memory ICs. Both parts implement identical POD interface specifications, ensuring signal compatibility with host controllers and memory subsystems.

Q: Are there any thermal performance differences between these parts?

A: No. Both parts operate across the identical temperature range of 0°C to 95°C (TC). Thermal characteristics and operating envelope are equivalent.

Q: Which part should be selected for new designs?

A: Selection should be based on supply chain availability and inventory levels. AS4C256M16D4A-75BCN currently has higher stock (1998 units vs. 765 units), which may provide supply chain advantages for volume production. Both parts are technically equivalent for new design implementation.

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