AP2181DM8G-13 Equivalent & Substitute Parts

Part Overview

The AP2181DM8G-13 is a Power Switch/Driver IC manufactured by Diodes Incorporated, designed for USB switching applications with P-Channel output configuration. This component operates as a 1:1 power switch with high-side output capability, delivering up to 1.5A at load voltages between 2.7V and 5.5V. The device is currently classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity.

Substiute Parts

AP2181DM8G-13

Diodes IncorporatedIn Stock: 3654AP2181DM8G-13 Datasheet

Current PartRFQ

AP2191DM8G-13

Diodes IncorporatedIn Stock: 19213AP2191DM8G-13 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP2181DM8G-13 is determined by strict equivalence across the following critical parameters:

• Switch Type: USB Switch
• Output Type: P-Channel
• Number of Outputs: 1
• Ratio - Input:Output: 1:1
• Output Configuration: High Side
• Voltage - Load: 2.7V ~ 5.5V
• Current - Output (Max): 1.5A
• Rds On (Typ): 95mOhm
• Operating Temperature: -40°C ~ 85°C (TA)
• Package / Case: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
• Mounting Type: Surface Mount

The AP2191DM8G-13 meets all these electrical and mechanical specifications. The primary difference between the AP2181DM8G-13 and AP2191DM8G-13 is the input type: the AP2181DM8G-13 features inverting logic, while the AP2191DM8G-13 features non-inverting logic. This distinction affects signal interpretation but does not alter the core switching capability or electrical performance envelope.

Parameter Comparison

Engineering Selection Recommendations

The AP2191DM8G-13 is the direct active substitute for the obsolete AP2181DM8G-13. Both components maintain identical electrical performance specifications, fault protection mechanisms, and thermal operating ranges. The AP2191DM8G-13 carries active product status with significantly higher inventory availability (19,126 units versus 3,595 units for the AP2181DM8G-13).

Both parts maintain full ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current manufacturing standards. The primary design consideration is the input logic inversion: designs utilizing the AP2181DM8G-13 with inverting input logic must account for the non-inverting input behavior of the AP2191DM8G-13 through appropriate signal conditioning or firmware adjustment.

Frequently Asked Questions (FAQ)

Q: Can the AP2191DM8G-13 directly replace the AP2181DM8G-13 without circuit modification?

A: Electrical and mechanical compatibility is complete. However, the input logic differs: AP2181DM8G-13 uses inverting logic while AP2191DM8G-13 uses non-inverting logic. Circuit designs must account for this input type difference through signal inversion at the control input or equivalent logic adjustment.

Q: Are the package dimensions identical between these parts?

A: Yes. Both components use the 8-TSSOP, 8-MSOP package with 0.118" width and 3.00mm height, enabling direct PCB footprint compatibility.

Q: What is the significance of the product status difference?

A: The AP2181DM8G-13 is classified as obsolete, indicating discontinued manufacturing and limited long-term availability. The AP2191DM8G-13 maintains active status with ongoing production and supply chain support.

Q: Are thermal and current handling specifications identical?

A: Yes. Both parts deliver maximum output current of 1.5A, maintain 95mOhm typical on-resistance, and operate across the identical temperature range of -40°C to 85°C.

Q: Do both parts support the same fault protection mechanisms?

A: Yes. Both the AP2181DM8G-13 and AP2191DM8G-13 include current limiting (fixed), over-temperature protection, reverse current protection, and UVLO (under-voltage lockout).