SC16C654IB64,151 Equivalent & Substitute Parts

Part Overview

The SC16C654IB64,151 is a quad UART interface IC with 64-byte FIFO, manufactured by NXP Semiconductors in a 64-LQFP surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. The part operates across multiple supply voltages (2.5V, 3.3V, 5V) and supports advanced serial communication features including auto flow control, IrDA encoding/decoding, false start bit detection, and modem control.

Key Parameters

Parameter	SC16C654IB64,151
Manufacturer	NXP Semiconductors
Number of Channels	4 (QUART)
FIFO Size	64 Byte
Data Rate (Max)	5 Mbps
Supply Voltage	2.5V, 3.3V, 5V
Package / Case	64-LQFP (10x10)
Auto Flow Control	Yes
IrDA Encoder/Decoder	Yes
False Start Bit Detection	Yes
Modem Control	Yes
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the SC16C654IB64,151 is determined by the following critical parameters:

Primary Compatibility Criteria:

4-channel UART configuration (QUART)
64-LQFP surface mount package (10x10mm)
64-byte FIFO capacity
Support for auto flow control, modem control, and false start bit detection
IrDA encoder/decoder functionality

Substitute Categories:

Category 1: Direct Parametric Equivalent SC16C654BIB64,151 (NXP USA Inc.) maintains identical electrical and functional specifications to the main part, including 64-byte FIFO, 5 Mbps data rate, and full feature set. Product status is Last Time Buy, indicating continued availability with limited production window.

Category 2: Functional Equivalents with Reduced FIFO ST16C554 series parts (ST16C554CQ64-F, ST16C554DCQ64-F, ST16C554DIQ64-F, ST16C554DIQ64TR-F) provide 4-channel UART functionality in the same 64-LQFP package but with 16-byte FIFO instead of 64-byte. These parts are manufactured by MaxLinear, Inc., are active products, and support the same modem control and flow control features. Data rate is reduced to 1.5 Mbps. IrDA encoder/decoder is not supported.

Category 3: Full Feature Equivalents with Active Status ST16C654 series parts (ST16C654CQ64-F, ST16C654DCQ64-F, ST16C654DIQ64-F, ST16C654IQ64-F) match the main part's 64-byte FIFO and full feature set including IrDA support. All are manufactured by MaxLinear, Inc., with active product status. Data rate is 1.5 Mbps. Supply voltage range is 2.97V to 5.5V. Moisture sensitivity level is 3 (168 hours).

Category 4: Legacy Equivalent TL16CP554APM (Texas Instruments) is an obsolete 16-byte FIFO quad UART with 1 Mbps maximum data rate. This part lacks IrDA encoder/decoder support and has narrower supply voltage range (3V to 5.25V).

Parameter Comparison

Part Number	Manufacturer	Channels	FIFO (Byte)	Data Rate (Mbps)	Supply Voltage	IrDA Support	Product Status	MSL	Packaging
SC16C654IB64,151	NXP Semiconductors	4	64	5	2.5V, 3.3V, 5V	Yes	Obsolete	1	64-LQFP
SC16C654BIB64,151	NXP USA Inc.	4	64	5	2.5V, 3.3V, 5V	Yes	Last Time Buy	1	64-LQFP
ST16C554CQ64-F	MaxLinear, Inc.	4	16	1.5	2.97V ~ 5.5V	No	Active	3	64-LQFP
ST16C554DCQ64-F	MaxLinear, Inc.	4	16	1.5	2.97V ~ 5.5V	No	Active	3	64-LQFP
ST16C554DIQ64-F	MaxLinear, Inc.	4	16	1.5	2.97V ~ 5.5V	No	Active	3	64-LQFP
ST16C554DIQ64TR-F	MaxLinear, Inc.	4	16	1.5	2.97V ~ 5.5V	No	Active	3	64-LQFP (Tape & Reel)
ST16C654CQ64-F	MaxLinear, Inc.	4	64	1.5	2.97V ~ 5.5V	Yes	Active	3	64-LQFP
ST16C654DCQ64-F	MaxLinear, Inc.	4	64	1.5	2.97V ~ 5.5V	Yes	Active	3	64-LQFP
ST16C654DIQ64-F	MaxLinear, Inc.	4	64	1.5	2.97V ~ 5.5V	Yes	Active	3	64-LQFP
ST16C654IQ64-F	MaxLinear, Inc.	4	64	1.5	2.97V ~ 5.5V	Yes	Active	3	64-LQFP
TL16CP554APM	Texas Instruments	4	16	1	3V ~ 5.25V	No	Obsolete	3	64-LQFP

Engineering Selection Recommendations

For Direct Replacement (Highest Compatibility): SC16C654BIB64,151 is the primary equivalent, maintaining all electrical and functional parameters of the SC16C654IB64,151. This part is available in tray packaging with 1900 units in stock and carries Last Time Buy status. Both parts are ROHS3 compliant and REACH unaffected. The MSL rating of 1 (unlimited) on the original part is preserved.

For Active Product Requirement: ST16C654 series parts (ST16C654CQ64-F, ST16C654DCQ64-F, ST16C654DIQ64-F, ST16C654IQ64-F) are manufactured by MaxLinear, Inc., and maintain active product status. These parts preserve the 64-byte FIFO and IrDA encoder/decoder functionality. All are ROHS3 compliant and REACH unaffected. The trade-off is reduced data rate (1.5 Mbps versus 5 Mbps) and higher moisture sensitivity level (MSL 3 versus MSL 1). Supply voltage range is 2.97V to 5.5V, which encompasses the original part's voltage specifications.

For Cost-Optimized Substitution with Functional Compromise: ST16C554 series parts (ST16C554CQ64-F, ST16C554DCQ64-F, ST16C554DIQ64-F, ST16C554DIQ64TR-F) provide 4-channel UART functionality in the same package with significantly higher inventory availability (6176 to 20200 units). These parts are suitable only when 16-byte FIFO capacity is acceptable and IrDA functionality is not required. Data rate is limited to 1.5 Mbps. All variants are ROHS3 compliant and REACH unaffected.

For Legacy System Maintenance: TL16CP554APM (Texas Instruments) is obsolete with 1871 units in stock. This part is suitable only for legacy system repairs where 16-byte FIFO and 1 Mbps data rate are acceptable. IrDA support is not available. This part has narrower supply voltage range (3V to 5.25V) and higher MSL rating (3).

Frequently Asked Questions (FAQ)

Q: Can ST16C554 series parts directly replace SC16C654IB64,151? A: ST16C554 parts are not direct replacements. While they maintain the 4-channel UART configuration and 64-LQFP package, they provide only 16-byte FIFO instead of 64-byte, lack IrDA encoder/decoder support, and operate at reduced data rate (1.5 Mbps versus 5 Mbps). These parts are suitable only when system design can accommodate reduced FIFO depth and lower data rate.

Q: What is the difference between SC16C654BIB64,151 and ST16C654 series parts? A: SC16C654BIB64,151 is a direct parametric equivalent manufactured by NXP USA Inc. with identical specifications to the original part. ST16C654 series parts are manufactured by MaxLinear, Inc., with active product status but reduced data rate (1.5 Mbps). Both maintain 64-byte FIFO and IrDA support. SC16C654BIB64,151 has MSL rating of 1 (unlimited), while ST16C654 series has MSL rating of 3 (168 hours).

Q: Are all substitute parts ROHS3 compliant? A: All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the compliance status of the original SC16C654IB64,151.

Q: What packaging options are available for ST16C554DIQ64 variants? A: ST16C554DIQ64-F is available in tray packaging. ST16C554DIQ64TR-F is the same part in tape and reel (TR) packaging, suitable for automated assembly processes.

Q: Does supply voltage range affect substitution compatibility? A: The original SC16C654IB64,151 operates at 2.5V, 3.3V, and 5V. ST16C654 series parts operate at 2.97V to 5.5V, which encompasses these voltages. ST16C554 series parts operate at 2.97V to 5.5V. TL16CP554APM operates at 3V to 5.25V. Verify system supply voltage requirements before selection.

Q: What is the significance of MSL (Moisture Sensitivity Level) rating? A: MSL rating indicates moisture sensitivity during storage and handling. SC16C654IB64,151 has MSL 1 (unlimited shelf life). SC16C654BIB64,151 also has MSL 1. All MaxLinear and Texas Instruments substitutes have MSL 3 (168 hours), requiring controlled storage conditions and baking procedures before reflow soldering.

Q: Can TL16CP554APM be used as a substitute? A: TL16CP554APM is obsolete with limited inventory. It provides only 16-byte FIFO, 1 Mbps data rate, and lacks IrDA support. This part is suitable only for legacy system maintenance where these limitations are acceptable.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message