AP2181DWG-7 Equivalent & Substitute Parts

Part Overview

The AP2181DWG-7 is an active P-Channel power switch/driver manufactured by Diodes Incorporated, designed for USB switching applications. This component operates as a 1:1 high-side switch with integrated load discharge and status flag capabilities. The part is currently in active production status with 7400 units available in inventory. Alternative models may be required due to inventory constraints, design optimization, or specific application requirements for input signal polarity.

Substiute Parts

AP2181DWG-7

Diodes IncorporatedIn Stock: 7443AP2181DWG-7 Datasheet

Current PartRFQ

AP2191DWG-7

Diodes IncorporatedIn Stock: 30195AP2191DWG-7 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The AP2191DWG-7 qualifies as a parametric equivalent to the AP2181DWG-7 based on the following critical substitution criteria:

Matching Parameters:

• Identical manufacturer (Diodes Incorporated)
• Identical switch type (USB Switch)
• Identical output configuration (P-Channel, High Side, 1:1 ratio)
• Identical load voltage range (2.7V ~ 5.5V)
• Identical maximum output current (1.5A)
• Identical on-resistance (95mOhm typical)
• Identical operating temperature range (-40°C ~ 85°C)
• Identical package (SC-74A, SOT-753)
• Identical mounting type (Surface Mount)
• Identical fault protection features (Current Limiting, Over Temperature, Reverse Current, UVLO)
• Identical load discharge and status flag features
• Both parts are Active status with ROHS3 compliance

Distinguishing Parameter:

• Input Type: AP2181DWG-7 uses Inverting logic; AP2191DWG-7 uses Non-Inverting logic

This difference in input signal polarity is the sole functional distinction between these parts. Selection depends on the control signal requirements of the application circuit.

Parameter Comparison

Engineering Selection Recommendations

Both AP2181DWG-7 and AP2191DWG-7 are Active status components with ROHS3 compliance and identical electrical and thermal specifications. Selection between these parts is determined by the control signal logic required by the application:

• AP2181DWG-7: Select when the application requires Inverting input logic (active-low control signal).
• AP2191DWG-7: Select when the application requires Non-Inverting input logic (active-high control signal).

Both parts are suitable for production use. The AP2191DWG-7 offers higher inventory availability (30100 units versus 7400 units).

Frequently Asked Questions (FAQ)

Q: Can AP2191DWG-7 be used as a direct replacement for AP2181DWG-7?

A: Direct replacement is possible only if the application circuit can accommodate Non-Inverting input logic instead of Inverting logic. The control signal polarity must match the part's input type specification. If the circuit is designed for Inverting logic, the AP2191DWG-7 will not function as intended without circuit modification.

Q: Are the electrical performance characteristics identical between these parts?

A: Yes. Both parts share identical load voltage range (2.7V ~ 5.5V), maximum output current (1.5A), on-resistance (95mOhm typical), operating temperature range (-40°C ~ 85°C), and fault protection features. The only functional difference is input signal polarity.

Q: Do both parts use the same package?

A: Yes. Both AP2181DWG-7 and AP2191DWG-7 use SC-74A/SOT-753 packaging with Surface Mount mounting type. PCB layout and footprint are identical.

Q: Are there compliance or regulatory differences between these parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Moisture sensitivity level is 1 (Unlimited) for both parts.

Q: Which part should be selected for new designs?

A: Selection depends on whether the control circuit provides Inverting or Non-Inverting logic. Verify the control signal polarity requirement in the application schematic before part selection. Both parts are Active status and suitable for production designs.