FST16211MTDX Equivalent & Substitute Parts

Part Overview

The FST16211MTDX is a 12 x 1:1 bus switch logic IC manufactured by onsemi, housed in a 56-TSSOP package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The FST16211MTDX operates with a single supply voltage between 4V and 5.5V, supporting operating temperatures from -40°C to 85°C. Substitute parts must maintain functional equivalence in circuit topology, electrical specifications, and mechanical compatibility while accounting for packaging variations and product status differences.

Key Parameters

Parameter	FST16211MTDX
Manufacturer	onsemi
Type	Bus Switch
Circuit Configuration	12 x 1:1
Independent Circuits	2
Voltage Supply	Single Supply
Voltage Range	4V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	56-TFSOP (0.240", 6.10mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
MSL Rating	2 (1 Year)

Substitute Part Grouping Explanation

Substitute parts for the FST16211MTDX are grouped based on the following allowed electrical and mechanical parameters:

Electrical Compatibility Criteria:

Bus switch topology: 12 x 1:1 configuration with 2 independent circuits
Single supply voltage operation
Voltage supply range: 4V ~ 5.5V (or 4.5V ~ 5.5V for Texas Instruments variants)
Operating temperature range: -40°C ~ 85°C
Surface mount technology

Mechanical Compatibility Criteria:

Package type: 56-TFSOP, 56-TVSOP, or 56-BSSOP (all 56-pin variants)
Package width variations: 0.240" (6.10mm), 0.173" (4.40mm), or 0.295" (7.50mm)
Packaging format: Cut Tape (CT), Tape & Reel (TR), or Tube

Compliance Criteria:

RoHS3 compliance
REACH unaffected status
EAR99 classification

Substitutes are classified as direct, similar, or parametric equivalents based on voltage range alignment and package compatibility with the original FST16211MTDX specification.

Parameter Comparison

Part Number	Manufacturer	Circuit	Voltage Range	Operating Temp	Package Type	Package Width	Product Status	MSL Rating	Inventory
FST16211MTDX	onsemi	12 x 1:1	4V ~ 5.5V	-40°C ~ 85°C	56-TFSOP	0.240" (6.10mm)	Obsolete	2 (1 Year)	2091 Pcs
SN74CBTH16211DGGR	Texas Instruments	12 x 1:1	4.5V ~ 5.5V	-40°C ~ 85°C	56-TFSOP	0.240" (6.10mm)	Last Time Buy	1 (Unlimited)	929 Pcs
SN74CBT16211ADGVR	Texas Instruments	12 x 1:1	4.5V ~ 5.5V	-40°C ~ 85°C	56-TVSOP	0.173" (4.40mm)	Last Time Buy	1 (Unlimited)	2000 Pcs
SN74CBT16211ADL	Texas Instruments	12 x 1:1	4.5V ~ 5.5V	-40°C ~ 85°C	56-BSSOP	0.295" (7.50mm)	Last Time Buy	1 (Unlimited)	2100 Pcs
SN74CBT16211ADLR	Texas Instruments	12 x 1:1	4.5V ~ 5.5V	-40°C ~ 85°C	56-BSSOP	0.295" (7.50mm)	Last Time Buy	1 (Unlimited)	4300 Pcs
SN74CBT16211CDGGR	Texas Instruments	12 x 1:1	4.5V ~ 5.5V	-40°C ~ 85°C	56-TFSOP	0.240" (6.10mm)	Active	1 (Unlimited)	2320 Pcs
SN74CBT16211CDGVR	Texas Instruments	12 x 1:1	4.5V ~ 5.5V	-40°C ~ 85°C	56-TVSOP	0.173" (4.40mm)	Active	1 (Unlimited)	90400 Pcs
SN74CBT16211CDL	Texas Instruments	12 x 1:1	4.5V ~ 5.5V	-40°C ~ 85°C	56-BSSOP	0.295" (7.50mm)	Active	1 (Unlimited)	1471 Pcs
SN74CBT16211CDLR	Texas Instruments	12 x 1:1	4.5V ~ 5.5V	-40°C ~ 85°C	56-BSSOP	0.295" (7.50mm)	Active	1 (Unlimited)	2204 Pcs
SN74CBTD16211DGGR	Texas Instruments	12 x 1:1	4.5V ~ 5.5V	-40°C ~ 85°C	56-TFSOP	0.240" (6.10mm)	Active	1 (Unlimited)	3900 Pcs
SN74CBT16811CDGGR	Texas Instruments	12 x 1:1	4V ~ 5.5V	-40°C ~ 85°C	56-TFSOP	0.240" (6.10mm)	Active	1 (Unlimited)	2743 Pcs

Engineering Selection Recommendations

Direct Package Match (56-TFSOP, 0.240" width):

SN74CBT16211CDGGR and SN74CBTD16211DGGR are the primary substitutes for FST16211MTDX when identical package geometry is required. Both are Active status parts from Texas Instruments with ROHS3 compliance and unlimited MSL ratings. SN74CBT16211CDGGR offers the highest inventory availability (2320 Pcs) and is suitable for new designs. SN74CBTD16211DGGR provides an alternative with comparable specifications and higher inventory (3900 Pcs).

SN74CBTH16211DGGR is a direct package match classified as Last Time Buy. This part maintains the same 56-TFSOP package and electrical specifications but has lower inventory (929 Pcs) and should be considered only when other Active alternatives are unavailable.

SN74CBT16811CDGGR is a parametric equivalent with identical package geometry and voltage range (4V ~ 5.5V matching the original FST16211MTDX). This part is Active status with 2743 Pcs inventory and represents a viable long-term alternative.

Alternative Package Options:

For applications where package footprint flexibility exists, Texas Instruments offers Active status alternatives in different package geometries:

56-TVSOP packages (0.173" width): SN74CBT16211CDGVR (90400 Pcs inventory) and SN74CBT16211ADGVR (2000 Pcs inventory) provide the narrowest package option with Active status and unlimited MSL ratings.

56-BSSOP packages (0.295" width): SN74CBT16211CDLR (2204 Pcs, Active), SN74CBT16211CDL (1471 Pcs, Active), SN74CBT16211ADLR (4300 Pcs, Last Time Buy), and SN74CBT16211ADL (2100 Pcs, Last Time Buy) offer the widest package option with substantial inventory availability.

All substitute parts maintain ROHS3 compliance, REACH unaffected status, and EAR99 classification consistent with the original FST16211MTDX.

Frequently Asked Questions (FAQ)

Q: Can SN74CBT16211CDGGR directly replace FST16211MTDX without PCB redesign?

A: Yes. SN74CBT16211CDGGR matches the FST16211MTDX in package type (56-TFSOP), package width (0.240", 6.10mm), circuit configuration (12 x 1:1), and electrical specifications (4.5V ~ 5.5V supply, -40°C ~ 85°C operating range). The part is Active status with unlimited MSL rating, making it suitable for direct substitution on existing PCB layouts.

Q: What is the difference between 56-TFSOP, 56-TVSOP, and 56-BSSOP packages?

A: These are all 56-pin surface mount packages with different body widths. 56-TFSOP measures 0.240" (6.10mm) width, 56-TVSOP measures 0.173" (4.40mm) width, and 56-BSSOP measures 0.295" (7.50mm) width. Package selection depends on PCB layout constraints. Narrower packages (TVSOP) require tighter routing, while wider packages (BSSOP) provide more spacing. All three package types are electrically equivalent for the FST16211MTDX substitution.

Q: Why does SN74CBT16811CDGGR have a different voltage range (4V ~ 5.5V) compared to other Texas Instruments substitutes (4.5V ~ 5.5V)?

A: SN74CBT16811CDGGR is classified as a parametric equivalent rather than a direct substitute. Its voltage range (4V ~ 5.5V) matches the original FST16211MTDX specification exactly, providing broader supply voltage tolerance. This part is suitable for applications requiring the extended lower voltage limit of 4V.

Q: What is the significance of Product Status (Active, Last Time Buy, Obsolete)?

A: Product Status indicates manufacturer support and availability. Active parts are in full production with long-term availability. Last Time Buy parts are no longer manufactured but remain available from existing inventory. Obsolete parts (like FST16211MTDX) are no longer produced or supported. For new designs, select Active status parts. For legacy system support, Last Time Buy parts provide interim solutions with defined inventory limits.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, REACH unaffected status, and EAR99 classification, matching the environmental and regulatory compliance of the original FST16211MTDX.

Q: Which substitute offers the best inventory availability?

A: SN74CBT16211CDGVR (56-TVSOP package) provides the highest inventory at 90400 Pcs. For the identical 56-TFSOP package match, SN74CBTD16211DGGR offers 3900 Pcs and SN74CBT16211CDGGR offers 2320 Pcs, both with Active status.

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