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SC16C554IB64,157 Equivalent & Substitute Parts
Part Overview
The SC16C554IB64,157 is a quad UART interface IC with 16-byte FIFO, manufactured by NXP USA Inc., designed for serial communication applications requiring four independent channels. This component operates across multiple voltage supplies (2.5V, 3.3V, 5V) and supports advanced features including auto flow control, IrDA encoder/decoder, false start bit detection, and modem control. The part is classified as obsolete, necessitating identification of active substitute components that maintain functional and electrical compatibility for ongoing system support and new designs.
Substiute Parts
Key Parameters
| Parameter | SC16C554IB64,157 |
|---|---|
| Manufacturer | NXP USA Inc. |
| Number of Channels | 4 (QUART) |
| FIFO Size | 16 Byte |
| Data Rate (Max) | 5 Mbps |
| Voltage Supply | 2.5V, 3.3V, 5V |
| Auto Flow Control | Yes |
| IrDA Encoder/Decoder | Yes |
| False Start Bit Detection | Yes |
| Modem Control | Yes |
| Package | 64-LQFP (10x10) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution of the SC16C554IB64,157 is determined by the following critical parameters:
Primary Compatibility Criteria:
- Four independent UART channels (QUART configuration)
- 64-LQFP (10x10) package footprint for direct PCB compatibility
- Surface mount mounting type
- Auto flow control capability
- False start bit detection
- Modem control support
- ROHS3 compliance
Secondary Compatibility Criteria:
- FIFO depth (16 Byte minimum for functional equivalence)
- Voltage supply range compatibility (minimum 3.3V and 5V support)
- Data rate capability (minimum 1 Mbps)
Substitute parts are grouped into two categories based on FIFO depth: 16-byte FIFO equivalents (ST16C554 series) and enhanced 64-byte FIFO alternatives (ST16C654 series). The 128-byte FIFO variant (XR16C854CV-F) represents an upgraded option with extended buffering capability.
Parameter Comparison
| Parameter | SC16C554IB64,157 | ST16C554CQ64-F | ST16C554DCQ64-F | ST16C554DIQ64-F | ST16C554DIQ64TR-F | ST16C654CQ64-F | ST16C654DCQ64-F | ST16C654DIQ64-F | ST16C654IQ64-F | TL16CP554APM | XR16C854CV-F |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | NXP USA Inc. | MaxLinear, Inc. | MaxLinear, Inc. | MaxLinear, Inc. | MaxLinear, Inc. | MaxLinear, Inc. | MaxLinear, Inc. | MaxLinear, Inc. | MaxLinear, Inc. | Texas Instruments | MaxLinear, Inc. |
| Number of Channels | 4 (QUART) | 4 (QUART) | 4 (QUART) | 4 (QUART) | 4 (QUART) | 4 (QUART) | 4 (QUART) | 4 (QUART) | 4 (QUART) | 4 (QUART) | 4 (QUART) |
| FIFO Size | 16 Byte | 16 Byte | 16 Byte | 16 Byte | 16 Byte | 64 Byte | 64 Byte | 64 Byte | 64 Byte | 16 Byte | 128 Byte |
| Data Rate (Max) | 5 Mbps | 1.5 Mbps | 1.5 Mbps | 1.5 Mbps | 1.5 Mbps | 1.5 Mbps | 1.5 Mbps | 1.5 Mbps | 1.5 Mbps | 1 Mbps | 2 Mbps |
| Voltage Supply | 2.5V, 3.3V, 5V | 2.97V ~ 5.5V | 2.97V ~ 5.5V | 2.97V ~ 5.5V | 2.97V ~ 5.5V | 2.97V ~ 5.5V | 2.97V ~ 5.5V | 2.97V ~ 5.5V | 2.97V ~ 5.5V | 3V ~ 5.25V | 2.97V ~ 5.5V |
| Auto Flow Control | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| IrDA Encoder/Decoder | Yes | — | — | — | — | Yes | Yes | Yes | Yes | — | Yes |
| False Start Bit Detection | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Modem Control | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Package | 64-LQFP (10x10) | 64-LQFP (10x10) | 64-LQFP (10x10) | 64-LQFP (10x10) | 64-LQFP (10x10) | 64-LQFP (10x10) | 64-LQFP (10x10) | 64-LQFP (10x10) | 64-LQFP (10x10) | 64-LQFP (10x10) | 64-LQFP (10x10) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active | Active | Obsolete | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | RoHS Compliant | RoHS Compliant | ROHS3 Compliant | ROHS3 Compliant | RoHS Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
Direct Equivalents (16-Byte FIFO):
The ST16C554 series (ST16C554CQ64-F, ST16C554DCQ64-F, ST16C554DIQ64-F, ST16C554DIQ64TR-F) provides functional equivalence to the SC16C554IB64,157 with identical FIFO depth and channel configuration. All variants are manufactured by MaxLinear, Inc. and maintain active product status with ROHS3 compliance. These parts are suitable for direct replacement in applications where the original 16-byte FIFO depth is specified. The ST16C554DIQ64-F variant offers the highest inventory availability (20,200 units) among this group.
Enhanced Alternatives (64-Byte FIFO):
The ST16C654 series (ST16C654CQ64-F, ST16C654DCQ64-F, ST16C654DIQ64-F, ST16C654IQ64-F) provides increased FIFO depth (64 bytes) while maintaining four-channel UART functionality and identical package footprint. These parts retain IrDA encoder/decoder capability present in the original SC16C554IB64,157. All ST16C654 variants are active products with ROHS3 compliance and are suitable for applications requiring enhanced buffering capacity without PCB redesign.
Extended Buffering Option:
The XR16C854CV-F offers 128-byte FIFO depth with extended data rate capability (2 Mbps) and dual protocol support (RS232, RS485). This variant is appropriate for applications requiring maximum buffering and higher communication speeds while maintaining the 64-LQFP package footprint.
Obsolete Alternative:
The TL16CP554APM (Texas Instruments) is classified as obsolete and should not be selected for new designs despite functional compatibility. This part is retained in the substitution list for legacy system maintenance only.
Frequently Asked Questions (FAQ)
Q: Can ST16C554 series parts directly replace the SC16C554IB64,157?
A: Yes. The ST16C554 series maintains identical channel count (4 QUART), FIFO depth (16 byte), package (64-LQFP 10x10), and core feature set including auto flow control, false start bit detection, and modem control. Voltage supply ranges are compatible with standard 3.3V and 5V applications.
Q: What is the primary difference between ST16C554 and ST16C654 substitutes?
A: FIFO depth. ST16C554 variants provide 16-byte FIFO matching the original part, while ST16C654 variants provide 64-byte FIFO for enhanced buffering. Both maintain identical channel count, package, and mounting type. ST16C654 variants also retain IrDA encoder/decoder functionality.
Q: Are there packaging differences among ST16C554 variants?
A: ST16C554DIQ64TR-F is supplied in Tape & Reel (TR) format for automated assembly, while ST16C554CQ64-F, ST16C554DCQ64-F, and ST16C554DIQ64-F are supplied in Tray format. All maintain identical electrical specifications and 64-LQFP package footprint.
Q: Does the XR16C854CV-F require PCB modifications?
A: No. The XR16C854CV-F maintains the 64-LQFP (10x10) package footprint, enabling direct PCB compatibility. However, the increased FIFO depth (128 bytes) and dual protocol support (RS232, RS485) represent functional enhancements beyond the original specification.
Q: Which substitute part offers the best inventory availability?
A: ST16C554DIQ64-F provides the highest inventory (20,200 units), followed by ST16C554DIQ64TR-F (17,100 units). Both are active products with identical electrical specifications.
Q: Is IrDA encoder/decoder support critical for substitution?
A: IrDA support is present in the original SC16C554IB64,157 and retained in ST16C654 series and XR16C854CV-F variants. ST16C554 series variants do not include IrDA encoder/decoder. Selection depends on application requirements.
Q: What compliance certifications apply to all substitute parts?
A: All active substitute parts maintain ROHS3 compliance and REACH Unaffected status, matching the original part's environmental compliance profile.
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