Z8F0423QB005EC Equivalent & Substitute Parts

Part Overview

The Z8F0423QB005EC is an 8-bit microcontroller from Zilog's eZ8 Encore!® XP® series, designed for embedded applications requiring low-power operation and integrated connectivity features. This device integrates 4KB of FLASH program memory, 1KB of RAM, and a 5MHz internal oscillator within a compact 8-QFN surface-mount package.

The Z8F0423QB005EC carries an Obsolete product status, making identification of functionally equivalent alternatives essential for ongoing system support, design updates, and production continuity. The primary substitute maintains identical electrical and mechanical specifications while offering Active product status and improved compliance certifications.

Key Parameters

Parameter	Value
Core Processor	eZ8
Core Size	8-Bit
Speed	5MHz
Program Memory Size	4KB (4K x 8)
Program Memory Type	FLASH
RAM Size	1K x 8
Voltage Supply (Vcc/Vdd)	2.7V ~ 3.6V
Data Converters	A/D 4x10b
Number of I/O	6
Connectivity	IrDA, UART/USART
Peripherals	Brown-out Detect/Reset, LED, POR, PWM, WDT
Operating Temperature	-40°C ~ 105°C (TA)
Mounting Type	Surface Mount
Package / Case	8-VDFN Exposed Pad
Supplier Device Package	8-QFN (5x6)

Substitute Part Grouping Explanation

Substitution eligibility for the Z8F0423QB005EC is determined by strict equivalence across the following critical parameters:

Core Architecture: eZ8 processor family
Memory Configuration: 4KB FLASH program memory, 1KB RAM
Operating Frequency: 5MHz
Supply Voltage Range: 2.7V ~ 3.6V
I/O Count: 6 pins
Connectivity & Peripherals: IrDA, UART/USART, Brown-out Detect/Reset, LED, POR, PWM, WDT
Package Specification: 8-QFN (5x6) with 8-VDFN Exposed Pad configuration
Thermal Range: -40°C ~ 105°C

The Z8F0423QB005EG meets all electrical and mechanical requirements for direct substitution. The primary distinction lies in packaging format (Tray vs. standard) and product lifecycle status.

Parameter Comparison

Parameter	Z8F0423QB005EC	Z8F0423QB005EG	Match
Manufacturer	Zilog	Zilog	✓
Core Processor	eZ8	eZ8	✓
Core Size	8-Bit	8-Bit	✓
Speed	5MHz	5MHz	✓
Program Memory Size	4KB (4K x 8)	4KB (4K x 8)	✓
Program Memory Type	FLASH	FLASH	✓
RAM Size	1K x 8	1K x 8	✓
Voltage Supply (Vcc/Vdd)	2.7V ~ 3.6V	2.7V ~ 3.6V	✓
Data Converters	A/D 4x10b	A/D 4x10b	✓
Number of I/O	6	6	✓
Connectivity	IrDA, UART/USART	IrDA, UART/USART	✓
Peripherals	Brown-out Detect/Reset, LED, POR, PWM, WDT	Brown-out Detect/Reset, LED, POR, PWM, WDT	✓
Operating Temperature	-40°C ~ 105°C (TA)	-40°C ~ 105°C (TA)	✓
Mounting Type	Surface Mount	Surface Mount	✓
Package / Case	8-VDFN Exposed Pad	8-VDFN Exposed Pad	✓
Supplier Device Package	8-QFN (5x6)	8-QFN (5x6)	✓
Product Status	Obsolete	Active	—
RoHS Status	RoHS non-compliant	ROHS3 Compliant	—
Packaging Format	Standard	Tray	—

Engineering Selection Recommendations

Z8F0423QB005EG is the direct functional equivalent for Z8F0423QB005EC replacement.

Selection Basis:

The Z8F0423QB005EG provides complete electrical and mechanical compatibility with identical core architecture, memory configuration, I/O specifications, and thermal operating range. All critical substitution parameters match without exception.

Compliance Advantage:

The Z8F0423QB005EG carries Active product status and ROHS3 compliance certification, compared to the Obsolete status and RoHS non-compliance of the Z8F0423QB005EC. This distinction is significant for new designs, long-term supply chain planning, and regulatory requirements in markets with RoHS mandates.

Packaging Consideration:

The Z8F0423QB005EG is supplied in Tray packaging format. Verify that your assembly process and component handling procedures accommodate tray-packaged components if transitioning from standard packaging.

Frequently Asked Questions (FAQ)

Q: Can Z8F0423QB005EG be used as a direct replacement for Z8F0423QB005EC in existing designs?

A: Yes. All electrical specifications, memory configuration, I/O count, connectivity features, and package dimensions are identical. No circuit modifications are required for substitution.

Q: What is the significance of the product status difference (Obsolete vs. Active)?

A: Obsolete status indicates the Z8F0423QB005EC is no longer manufactured or supported by Zilog. The Z8F0423QB005EG maintains Active status, ensuring ongoing availability, technical support, and supply chain reliability for future production runs and design updates.

Q: Does the RoHS compliance difference affect electrical performance?

A: No. RoHS compliance relates to material composition and environmental regulations, not electrical function. The Z8F0423QB005EG's ROHS3 compliance is advantageous for markets with RoHS mandates and environmental regulations.

Q: Are there any pinout or footprint differences between these parts?

A: No. Both devices use the 8-QFN (5x6) package with 8-VDFN Exposed Pad configuration. PCB footprints and pinout assignments are identical.

Q: What is the difference between standard and Tray packaging?

A: Tray packaging is a bulk component carrier format used for automated assembly processes. Standard packaging typically refers to tube or reel formats. Verify your assembly equipment compatibility with tray-packaged components before procurement.

Q: Are firmware or software modifications required when switching to Z8F0423QB005EG?

A: No. Both devices share the same eZ8 core architecture and instruction set. Existing firmware compiled for Z8F0423QB005EC will execute identically on Z8F0423QB005EG without modification.

Q: What is the operating temperature range for both parts?

A: Both the Z8F0423QB005EC and Z8F0423QB005EG operate across -40°C to 105°C (TA), supporting industrial and extended-temperature applications.

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