S-8338ABAC-T8T1G Equivalent & Substitute Parts

Part Overview

The S-8338ABAC-T8T1G is a Boost Regulator Positive Output Step-Up DC-DC Controller IC manufactured by ABLIC Inc. in 8-TSSOP surface mount packaging. This part functions as a transistor driver for step-up (boost) topology power management applications with a single positive output phase. The device operates across a 1.8V to 6V supply voltage range with switching frequency between 257.4kHz and 1.134MHz, supporting current limit, enable, and frequency control features.

The S-8338ABAC-T8T1G carries a "Not For New Designs" product status. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support long-term production requirements with actively maintained alternatives.

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 (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

Substitute parts for the S-8338ABAC-T8T1G are grouped based on strict electrical and mechanical compatibility criteria:

Primary Substitution Criteria:

Identical function (Step-Up DC-DC Controller)
Identical output type (Transistor Driver)
Identical output configuration (Positive)
Identical package (8-TSSOP)
Identical supply voltage range (1.8V ~ 6V)
Identical operating temperature range (-40°C ~ 85°C)
Identical control features (Current Limit, Enable, Frequency Control)
Identical RoHS and MSL compliance

Substitute Categories:

Category A - Direct Electrical Equivalents (S-8333 Series): S-8333CBDA-T8T1U, S-8333CCBC-T8T1U, S-8333TCDA-T8T1U, S-8333TCDB-T8T1U, S-8333TCDC-T8T1U, S-8333TCIA-T8T1U, S-8333TCIB-T8T1U, S-8333TCIC-T8T1U

These parts maintain identical electrical specifications with minor variations in switching frequency range (280kHz ~ 1.08MHz) and maximum duty cycle (89% vs 88.5%). All feature identical supply voltage, temperature range, control features, and packaging. Product status is Active. Packaging varies between Tape & Reel (TR) and Cut Tape (CT).

Category B - Enhanced Control Feature Equivalent (S-8337 Series): S-8337ABIA-T8T1U

This part shares identical electrical specifications with the main part, including switching frequency range (257.4kHz ~ 1.134MHz) and duty cycle (89%). It maintains identical supply voltage, temperature range, control features, and packaging. Product status is Active. Packaging is Cut Tape (CT).

Category C - Direct Replacement (S-8338 Series): S-8338ACIA-T8T1U

This part is from the same S-8338 base product family with identical electrical specifications, switching frequency range (257.4kHz ~ 1.134MHz), and duty cycle (88.5%). It maintains all control features and compliance requirements. Product status is Active. Packaging is Cut Tape (CT).

Parameter Comparison

Part Number	Manufacturer	Product Status	Packaging	Voltage - Supply (Vcc/Vdd)	Frequency - Switching	Duty Cycle (Max)	Control Features	Operating Temperature	Package / Case	Inventory (Pcs)
S-8338ABAC-T8T1G	ABLIC Inc.	Not For New Designs	Tape & Reel (TR)	1.8V ~ 6V	257.4kHz ~ 1.134MHz	88.5%	Current Limit, Enable, Frequency Control	-40°C ~ 85°C	8-TSSOP (0.173", 4.40mm Width)	758
S-8333CBDA-T8T1U	ABLIC Inc.	Active	Tape & Reel (TR)	1.8V ~ 6V	280kHz ~ 1.08MHz	89%	Current Limit, Frequency Control	-40°C ~ 85°C	8-TSSOP (0.173", 4.40mm Width)	974
S-8333CCBC-T8T1U	ABLIC Inc.	Active	Cut Tape (CT)	1.8V ~ 6V	280kHz ~ 1.08MHz	89%	Current Limit, Frequency Control	-40°C ~ 85°C	8-TSSOP (0.173", 4.40mm Width)	728
S-8333TCDA-T8T1U	ABLIC Inc.	Active	Tape & Reel (TR)	1.8V ~ 6V	280kHz ~ 1.08MHz	89%	Current Limit, Frequency Control	-40°C ~ 85°C	8-TSSOP (0.173", 4.40mm Width)	1053
S-8333TCDB-T8T1U	ABLIC Inc.	Active	Tape & Reel (TR)	1.8V ~ 6V	280kHz ~ 1.08MHz	89%	Current Limit, Frequency Control	-40°C ~ 85°C	8-TSSOP (0.173", 4.40mm Width)	1002
S-8333TCDC-T8T1U	ABLIC Inc.	Active	Tape & Reel (TR)	1.8V ~ 6V	280kHz ~ 1.08MHz	89%	Current Limit, Frequency Control	-40°C ~ 85°C	8-TSSOP (0.173", 4.40mm Width)	935
S-8333TCIA-T8T1U	ABLIC Inc.	Active	Tape & Reel (TR)	1.8V ~ 6V	280kHz ~ 1.08MHz	89%	Current Limit, Frequency Control	-40°C ~ 85°C	8-TSSOP (0.173", 4.40mm Width)	1069
S-8333TCIB-T8T1U	ABLIC Inc.	Active	Tape & Reel (TR)	1.8V ~ 6V	280kHz ~ 1.08MHz	89%	Current Limit, Frequency Control	-40°C ~ 85°C	8-TSSOP (0.173", 4.40mm Width)	733
S-8333TCIC-T8T1U	ABLIC Inc.	Active	Tape & Reel (TR)	1.8V ~ 6V	280kHz ~ 1.08MHz	89%	Current Limit, Frequency Control	-40°C ~ 85°C	8-TSSOP (0.173", 4.40mm Width)	1059
S-8337ABIA-T8T1U	ABLIC Inc.	Active	Cut Tape (CT)	1.8V ~ 6V	257.4kHz ~ 1.134MHz	89%	Current Limit, Enable, Frequency Control	-40°C ~ 85°C	8-TSSOP (0.173", 4.40mm Width)	760
S-8338ACIA-T8T1U	ABLIC Inc.	Active	Cut Tape (CT)	1.8V ~ 6V	257.4kHz ~ 1.134MHz	88.5%	Current Limit, Enable, Frequency Control	-40°C ~ 85°C	8-TSSOP (0.173", 4.40mm Width)	801

Engineering Selection Recommendations

For Direct Replacement with Identical Specifications: S-8338ACIA-T8T1U is the primary recommendation. This part maintains identical electrical specifications to the S-8338ABAC-T8T1G, including switching frequency range (257.4kHz ~ 1.134MHz), maximum duty cycle (88.5%), and all control features (Current Limit, Enable, Frequency Control). Both parts carry Active product status and full ROHS3 compliance. The only difference is packaging format (Cut Tape vs. Tape & Reel), which does not affect electrical performance. Inventory availability is comparable (801 pcs vs. 758 pcs).

For Active Product Status with Minimal Electrical Variation: S-8337ABIA-T8T1U provides an alternative with Active product status. This part shares identical switching frequency range (257.4kHz ~ 1.134MHz) and control features with the main part. The maximum duty cycle is 89% versus 88.5%, representing a 0.5% increase. All other electrical parameters, temperature range, supply voltage, and compliance certifications remain identical. Packaging is Cut Tape (CT).

For High-Volume Availability with Acceptable Electrical Variation: 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) offers multiple Active alternatives with higher inventory levels (728–1069 pcs). These parts operate within the same supply voltage and temperature ranges. The switching frequency range is 280kHz ~ 1.08MHz (versus 257.4kHz ~ 1.134MHz), and maximum duty cycle is 89% (versus 88.5%). The primary difference is the absence of the Enable control feature in the S-8333 series; these parts retain Current Limit and Frequency Control. S-8333CCBC-T8T1U is available in Cut Tape packaging; all others are Tape & Reel.

Compliance and Certification: All substitute parts maintain ROHS3 compliance, Moisture Sensitivity Level 1 (Unlimited), and identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications. All parts are suitable for applications requiring regulatory compliance in the specified categories.

Frequently Asked Questions (FAQ)

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

A: S-8333 series parts are electrically compatible for boost regulator controller applications within the specified supply voltage and temperature ranges. However, they lack the Enable control feature present in the S-8338ABAC-T8T1G. If the Enable function is required for your application, use S-8338ACIA-T8T1U or S-8337ABIA-T8T1U instead. The switching frequency range and maximum duty cycle variations are within acceptable tolerances for most boost converter designs.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) packaging?

A: Tape & Reel and Cut Tape are packaging formats that affect handling and assembly processes, not electrical performance. Tape & Reel is suitable for automated pick-and-place assembly lines. Cut Tape is appropriate for manual assembly or lower-volume production. The electrical specifications and performance of the IC remain identical regardless of packaging format.

Q: Why does the S-8338ABAC-T8T1G have "Not For New Designs" status?

A: This designation indicates the part is in end-of-life phase. ABLIC Inc. recommends using Active alternatives for new designs. All listed substitute parts carry Active status, ensuring long-term availability and continued manufacturer support.

Q: Are there differences in switching frequency between the main part and substitutes?

A: The S-8338ABAC-T8T1G and S-8337ABIA-T8T1U operate at 257.4kHz ~ 1.134MHz. The S-8333 series operates at 280kHz ~ 1.08MHz. Both ranges are suitable for typical boost converter applications. The frequency difference may affect output ripple characteristics and component selection (inductor, capacitor values), so verify compatibility with your specific circuit design.

Q: Is the 0.5% duty cycle difference (88.5% vs. 89%) significant?

A: The duty cycle difference between the main part (88.5%) and most substitutes (89%) is minimal and typically not significant for boost converter applications. This represents the maximum achievable duty cycle under specified conditions. Actual operating duty cycle depends on input voltage, output voltage, and load conditions. Both values support the same voltage conversion ratios for practical applications.

Q: Which substitute part offers the best inventory availability?

A: S-8333TCIA-T8T1U offers the highest inventory level at 1,069 pcs. S-8333TCDA-T8T1U (1,053 pcs) and S-8333TCIC-T8T1U (1,059 pcs) also provide excellent availability. If packaging format is not a constraint, these S-8333 variants ensure supply continuity.

Q: Can I use S-8333 series parts if my design requires the Enable feature?

A: No. The S-8333 series does not include the Enable control feature. If your circuit design requires enable/disable functionality, select S-8338ACIA-T8T1U or S-8337ABIA-T8T1U, both of which retain the Enable feature along with Current Limit and Frequency Control.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, Moisture Sensitivity Level 1 (Unlimited), and identical regulatory classifications (ECCN: EAR99, HTSUS: 8542.39.0001) as the main part.

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