TL16C554APNG4 Equivalent & Substitute Parts

Part Overview

The TL16C554APNG4 is a quad UART (Universal Asynchronous Receiver/Transmitter) interface IC manufactured by Texas Instruments, designed for asynchronous communication applications. This device integrates four independent UART channels with 16-byte FIFOs in an 80-pin LQFP package. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications requiring quad UART functionality with identical electrical and mechanical specifications.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Interface
Number of Channels	4 (QUART)
FIFO Depth	16 Byte
Data Rate (Max)	1 Mbps
Voltage Supply Range	3V to 5.25V
Auto Flow Control	Yes
False Start Bit Detection	Yes
Modem Control	Yes
Package Type	80-LQFP (12x12)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the TL16C554APNG4 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

Four independent UART channels with 16-byte FIFO buffers
Maximum data rate of 1 Mbps
Supply voltage range of 3V to 5.25V
Integrated auto flow control, false start bit detection, and modem control features

Mechanical Equivalence Requirements:

Surface mount technology
80-pin LQFP package with 12x12mm dimensions
Identical pin configuration and signal assignments

Compliance Requirements:

ROHS3 compliance
MSL rating of 3 (168 Hours)
REACH unaffected status
EAR99 ECCN classification

Substitutes are grouped into two categories: MFR Recommended (manufacturer-endorsed direct replacements) and Parametric Equivalents (functionally identical but with package variations or status differences).

Parameter Comparison

Parameter	TL16C554APNG4	TL16C554APN	TL16C554AIPN	TL16CP554APM
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Number of Channels	4 (QUART)	4 (QUART)	4 (QUART)	4 (QUART)
FIFO Depth	16 Byte	16 Byte	16 Byte	16 Byte
Data Rate (Max)	1 Mbps	1 Mbps	1 Mbps	1 Mbps
Voltage Supply	3V to 5.25V	3V to 5.25V	3V to 5.25V	3V to 5.25V
Auto Flow Control	Yes	Yes	Yes	Yes
False Start Bit Detection	Yes	Yes	Yes	Yes
Modem Control	Yes	Yes	Yes	Yes
Package Type	80-LQFP (12x12)	80-LQFP (12x12)	80-LQFP (12x12)	64-LQFP (10x10)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)
Product Status	Discontinued	Active	Active	Obsolete

Engineering Selection Recommendations

TL16C554APN (MFR Recommended Substitute)

This part is the primary recommended substitute for the TL16C554APNG4. It maintains identical electrical specifications, pin configuration, and package dimensions (80-LQFP 12x12mm). The part is currently in active production status with higher inventory availability (2153 pcs), ensuring supply chain continuity. ROHS3 compliance and MSL rating match the original specification. The only difference is packaging format (Tray vs. unspecified), which does not affect functional or mechanical compatibility.

TL16C554AIPN (Parametric Equivalent)

This part provides full parametric equivalence with identical electrical performance and package specifications (80-LQFP 12x12mm). It is in active production with the highest inventory availability (4561 pcs). ROHS3 compliance and MSL rating are identical. This part is suitable for direct substitution in applications where the original part is unavailable.

TL16CP554APM (Parametric Equivalent with Package Variation)

This part differs in package configuration (64-LQFP 10x10mm vs. 80-LQFP 12x12mm) and is classified as obsolete. The reduced pin count and smaller package footprint require PCB redesign and are not suitable for direct substitution in existing designs. This part should only be considered for new designs where the smaller package is advantageous and pin reassignment is feasible.

Frequently Asked Questions (FAQ)

Q: Can TL16C554APN be used as a direct replacement for TL16C554APNG4?

A: Yes. TL16C554APN is electrically and mechanically identical to TL16C554APNG4. Both devices feature four UART channels, 16-byte FIFOs, 1 Mbps data rate, 3V to 5.25V supply range, and identical 80-LQFP (12x12mm) package configuration. Pin-for-pin compatibility is maintained.

Q: What is the difference between TL16C554APN and TL16C554AIPN?

A: Both parts are electrically and mechanically equivalent with identical specifications and package dimensions. The primary difference is inventory availability and product status. Both are in active production and suitable for direct substitution.

Q: Why is TL16CP554APM not recommended as a direct substitute?

A: TL16CP554APM uses a 64-LQFP (10x10mm) package instead of the 80-LQFP (12x12mm) package of the original part. The reduced pin count and different package footprint require PCB redesign and are not compatible with existing board layouts. Additionally, this part is classified as obsolete.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (TL16C554APN, TL16C554AIPN, and TL16CP554APM) are ROHS3 compliant with MSL rating 3 (168 Hours), matching the original TL16C554APNG4 specification.

Q: Which substitute part has the best supply availability?

A: TL16C554AIPN has the highest inventory availability with 4561 pcs in stock, followed by TL16C554APN with 2153 pcs. Both are in active production status.

Q: Can I use TL16C554APN in a new design?

A: Yes. TL16C554APN is in active production status and is suitable for new designs requiring quad UART functionality with the specified electrical and mechanical parameters.

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