S-8338ACEC-T8T1G Equivalent & Substitute Parts

Part Overview

The S-8338ACEC-T8T1G is a Boost Regulator Positive Output Step-Up DC-DC Controller IC manufactured by ABLIC Inc. in 8-TSSOP packaging. This part operates as a transistor driver for step-up (boost) topology applications with a single output phase. The device is marked as Not For New Designs, making identification of active equivalent and substitute parts essential for ongoing production support and design continuity.

Key Parameters

Parameter	Value
Manufacturer	ABLIC Inc.
Category	Power Management (PMIC)
Function	Step-Up (Boost)
Output Type	Transistor Driver
Output Configuration	Positive
Number of Outputs	1
Voltage Supply Range (Vcc/Vdd)	1.8V ~ 6V
Frequency - Switching	257.4kHz ~ 1.134MHz
Duty Cycle (Max)	88.5%
Control Features	Current Limit, Enable, Frequency Control
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the S-8338ACEC-T8T1G is determined by the following critical parameters:

Primary Substitution Criteria:

Boost topology with positive output configuration
Single output phase
8-TSSOP package (0.173", 4.40mm Width)
Supply voltage range: 1.8V ~ 6V
Operating temperature: -40°C ~ 85°C
Transistor driver output type
Surface mount mounting type
ROHS3 compliance and MSL 1 rating

Secondary Compatibility Factors:

Switching frequency range (257.4kHz ~ 1.134MHz for S-8338 series; 280kHz ~ 1.08MHz for S-8333 series)
Duty cycle maximum (88.5% for S-8338 series; 89% for S-8333 series)
Control features (Current Limit, Enable, Frequency Control for S-8338; Current Limit, Frequency Control for S-8333)

The S-8333 series variants represent parametric equivalents with slightly different switching frequency and duty cycle specifications but maintain core functional compatibility. The S-8337ABIA-T8T1U shares identical switching frequency and duty cycle specifications with the main part.

Parameter Comparison

Part Number	Manufacturer	Packaging	Product Status	Vcc/Vdd (V)	Freq - Switching (kHz)	Duty Cycle Max (%)	Control Features	Inventory (Pcs)
S-8338ACEC-T8T1G	ABLIC Inc.	Tape & Reel (TR)	Not For New Designs	1.8 ~ 6	257.4 ~ 1134	88.5	Current Limit, Enable, Frequency Control	671
S-8333CBDA-T8T1U	ABLIC Inc.	Tape & Reel (TR)	Active	1.8 ~ 6	280 ~ 1080	89	Current Limit, Frequency Control	974
S-8333CCBC-T8T1U	ABLIC Inc.	Cut Tape (CT)	Active	1.8 ~ 6	280 ~ 1080	89	Current Limit, Frequency Control	728
S-8333TCDA-T8T1U	ABLIC Inc.	Tape & Reel (TR)	Active	1.8 ~ 6	280 ~ 1080	89	Current Limit, Frequency Control	1053
S-8333TCDB-T8T1U	ABLIC Inc.	Tape & Reel (TR)	Active	1.8 ~ 6	280 ~ 1080	89	Current Limit, Frequency Control	1002
S-8333TCDC-T8T1U	ABLIC Inc.	Tape & Reel (TR)	Active	1.8 ~ 6	280 ~ 1080	89	Current Limit, Frequency Control	935
S-8333TCIA-T8T1U	ABLIC Inc.	Tape & Reel (TR)	Active	1.8 ~ 6	280 ~ 1080	89	Current Limit, Frequency Control	1069
S-8333TCIB-T8T1U	ABLIC Inc.	Tape & Reel (TR)	Active	1.8 ~ 6	280 ~ 1080	89	Current Limit, Frequency Control	733
S-8333TCIC-T8T1U	ABLIC Inc.	Tape & Reel (TR)	Active	1.8 ~ 6	280 ~ 1080	89	Current Limit, Frequency Control	1059
S-8337ABIA-T8T1U	ABLIC Inc.	Cut Tape (CT)	Active	1.8 ~ 6	257.4 ~ 1134	89	Current Limit, Enable, Frequency Control	760
S-8338ACIA-T8T1U	ABLIC Inc.	Cut Tape (CT)	Active	1.8 ~ 6	257.4 ~ 1134	88.5	Current Limit, Enable, Frequency Control	801

Engineering Selection Recommendations

For Direct Replacement (Highest Compatibility): S-8338ACIA-T8T1U is the primary substitute. It maintains identical switching frequency range (257.4kHz ~ 1.134MHz), duty cycle specification (88.5%), and control feature set (Current Limit, Enable, Frequency Control) as the S-8338ACEC-T8T1G. The only difference is packaging format (Cut Tape vs. Tape & Reel) and active product status. This part is suitable for applications requiring the exact electrical characteristics of the original design.

For Active Production with Minor Parameter Variance: S-8337ABIA-T8T1U provides functional equivalence with identical switching frequency range and control features. The duty cycle maximum is 89% versus 88.5%, representing a 0.5% increase. This part is active and available in higher inventory quantities.

For Cost-Optimized Substitution: The S-8333 series (S-8333CBDA-T8T1U, S-8333TCDA-T8T1U, S-8333TCDB-T8T1U, S-8333TCDC-T8T1U, S-8333TCIA-T8T1U, S-8333TCIB-T8T1U, S-8333TCIC-T8T1U) represents parametric equivalents with switching frequency range of 280kHz ~ 1.08MHz and duty cycle maximum of 89%. These parts lack the Enable control feature present in the original design. Selection from this series requires circuit-level evaluation to confirm that the absence of the Enable pin does not impact application requirements.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, 8-TSSOP package geometry, and -40°C ~ 85°C operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can S-8333 series parts directly replace the S-8338ACEC-T8T1G?

A: S-8333 series parts are parametric equivalents with compatible boost topology and package specifications. However, they omit the Enable control feature. Direct replacement is possible only if the Enable function is not utilized in the circuit design. Switching frequency range differs slightly (280kHz ~ 1.08MHz vs. 257.4kHz ~ 1.134MHz).

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Both packaging formats contain identical die and electrical specifications. Tape & Reel (TR) is supplied on continuous carrier tape for automated assembly. Cut Tape (CT) is supplied as individual segments. Selection depends on assembly equipment compatibility and procurement volume requirements.

Q: Is S-8337ABIA-T8T1U a suitable substitute?

A: Yes. S-8337ABIA-T8T1U maintains identical switching frequency range (257.4kHz ~ 1.134MHz), control features (Current Limit, Enable, Frequency Control), and duty cycle specification (89%, versus 88.5% for the original). The 0.5% duty cycle variance is within typical application tolerance. This part is active and recommended for new production.

Q: Why is the original S-8338ACEC-T8T1G marked "Not For New Designs"?

A: This designation indicates the part is in end-of-life status. Active equivalents such as S-8338ACIA-T8T1U and S-8337ABIA-T8T1U are recommended for new designs to ensure long-term supply continuity and manufacturing support.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard PCB assembly processes and environmental regulations.

Q: What inventory levels are available for each substitute?

A: Current inventory ranges from 728 to 1069 pieces across the substitute options. S-8333TCIA-T8T1U and S-8333TCIC-T8T1U offer the highest availability at 1069 and 1059 pieces respectively. S-8338ACIA-T8T1U provides 801 pieces with identical electrical specifications to the original part.

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