PCA8553DTT/AJ Equivalent & Substitute Parts

Part Overview

The PCA8553DTT/AJ is an LCD driver IC manufactured by NXP USA Inc., designed to drive 160-segment LCD displays with support for 10, 20, or 160 display elements. The device operates across a wide supply voltage range of 1.8V to 5.5V and communicates via I2C and SPI interfaces. This part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

PCA8553DTT/AJ

NXP USA Inc.In Stock: 972PCA8553DTT/AJ Datasheet

Current PartRFQ

ML9475GAZA3A

Rohm SemiconductorIn Stock: 950ML9475GAZA3A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCA8553DTT/AJ is determined by the following critical parameters:

• Display Configuration: 160-segment LCD driver capability
• Interface Protocol: Serial communication support (I2C and/or SPI)
• Supply Voltage Range: Compatibility with system power requirements
• Operating Temperature Range: -40°C to 105°C minimum
• Package Type: Surface mount configuration
• Compliance Standards: RoHS3 compliance and automotive qualification where applicable

The ML9475GAZA3A from Rohm Semiconductor qualifies as a substitute based on matching 160-segment LCD driver functionality, serial interface capability, automotive-grade operating temperature range, and surface mount packaging. However, differences in package form factor (56-QFP versus 56-TFSOP), supply voltage specifications, and current consumption must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The ML9475GAZA3A is suitable as a substitute for the PCA8553DTT/AJ in applications where the following conditions are met:

• System design accommodates the 56-QFP package footprint in place of the 56-TFSOP package
• Supply voltage is within the ML9475GAZA3A range (2.7V ~ 3.6V or 4.5V ~ 5.5V); the 1.8V lower limit of the PCA8553DTT/AJ is not supported
• Increased quiescent current consumption (500 µA versus 1.8 µA) is acceptable for the application
• Serial interface protocol is compatible with system requirements
• Active product status and unlimited MSL rating of the ML9475GAZA3A provide superior long-term availability and handling flexibility

Both parts maintain AEC-Q100 automotive qualification and ROHS3 compliance, supporting use in automotive and industrial applications.

Frequently Asked Questions (FAQ)

Q: Can the ML9475GAZA3A directly replace the PCA8553DTT/AJ without PCB redesign?

A: No. The package form factors differ: PCA8553DTT/AJ uses 56-TFSOP while ML9475GAZA3A uses 56-QFP (9.5x10.5). PCB footprint redesign is required. Pin-to-pin compatibility must be verified against detailed datasheets.

Q: What is the impact of the supply voltage difference?

A: The PCA8553DTT/AJ supports 1.8V operation; the ML9475GAZA3A minimum is 2.7V. If your system operates at 1.8V, the ML9475GAZA3A cannot be used. For 2.7V and above, both parts are compatible within their respective ranges.

Q: Why is the current consumption significantly higher in the ML9475GAZA3A?

A: The ML9475GAZA3A draws 500 µA compared to 1.8 µA for the PCA8553DTT/AJ. This difference reflects different IC design architectures. For battery-powered or ultra-low-power applications, this may be a limiting factor.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the PCA8553DTT/AJ and ML9475GAZA3A meet AEC-Q100 automotive qualification standards and operate across -40°C to 105°C, supporting automotive-grade designs.

Q: What does the MSL rating difference mean for handling?

A: The PCA8553DTT/AJ has MSL 3 (168-hour floor life), requiring controlled moisture exposure. The ML9475GAZA3A has MSL 1 (unlimited floor life), allowing indefinite storage without moisture baking, providing greater handling flexibility.

Q: Are the interface protocols compatible?

A: The PCA8553DTT/AJ supports both I2C and SPI. The ML9475GAZA3A supports serial interface. Verify that your system's serial protocol requirements align with the ML9475GAZA3A specifications before substitution.