Z8F042APJ020EC Equivalent & Substitute Parts

Part Overview

The Z8F042APJ020EC is an 8-bit microcontroller from Zilog's eZ8 Encore!® XP® series, featuring 4KB FLASH program memory, 1KB RAM, and 128 bytes EEPROM. This device integrates 23 I/O pins, on-chip analog-to-digital conversion (8x10-bit), and peripheral functions including PWM, watchdog timer, and temperature sensor. The part operates at 20MHz with a supply voltage range of 2.7V to 3.6V and is rated for -40°C to 105°C operating temperature.

The Z8F042APJ020EC is classified as obsolete. Locating equivalent or substitute components is necessary for ongoing system support, maintenance, and new design implementations where this microcontroller family remains the specified solution.

Key Parameters

Parameter	Value
Manufacturer	Zilog
Series	Encore!® XP®
Core Processor	eZ8
Core Size	8-Bit
Speed	20MHz
Program Memory Size	4KB (4K x 8)
Program Memory Type	FLASH
RAM Size	1K x 8
EEPROM Size	128 x 8
Voltage Supply (Vcc/Vdd)	2.7V ~ 3.6V
Number of I/O	23
Data Converters	A/D 8x10b
Mounting Type	Through Hole
Package / Case	28-DIP (0.600", 15.24mm)
Operating Temperature	-40°C ~ 105°C (TA)

Substitute Part Grouping Explanation

Substitution of the Z8F042APJ020EC is determined by strict equivalence across the following critical parameters:

Manufacturer and Series: Both parts must be Zilog eZ8 Encore!® XP® microcontrollers
Core Architecture: 8-bit eZ8 processor
Memory Configuration: 4KB FLASH program memory, 1KB RAM, 128 bytes EEPROM
Speed Rating: 20MHz operation
Voltage Supply Range: 2.7V to 3.6V
I/O Count: 23 I/O pins
Analog Capability: 8-channel 10-bit A/D converter
Package Type: 28-pin DIP through-hole mounting
Peripheral Set: IrDA, UART/USART, Brown-out Detect/Reset, LED, LVD, POR, PWM, Temperature Sensor, WDT
Operating Temperature Range: -40°C to 105°C

The Z8F042APJ020EG2156 meets all these criteria and is therefore a direct functional equivalent.

Parameter Comparison

Parameter	Z8F042APJ020EC	Z8F042APJ020EG2156
Manufacturer	Zilog	Zilog
Series	Encore!® XP®	Encore!® XP®
Core Processor	eZ8	eZ8
Core Size	8-Bit	8-Bit
Speed	20MHz	20MHz
Program Memory Size	4KB (4K x 8)	4KB (4K x 8)
Program Memory Type	FLASH	FLASH
RAM Size	1K x 8	1K x 8
EEPROM Size	128 x 8	128 x 8
Voltage Supply (Vcc/Vdd)	2.7V ~ 3.6V	2.7V ~ 3.6V
Number of I/O	23	23
Data Converters	A/D 8x10b	A/D 8x10b
Oscillator Type	Internal	Internal
Operating Temperature	-40°C ~ 105°C (TA)	-40°C ~ 105°C (TA)
Mounting Type	Through Hole	Through Hole
Package / Case	28-DIP (0.600", 15.24mm)	28-DIP (0.600", 15.24mm)
Connectivity	IrDA, UART/USART	IrDA, UART/USART
Peripherals	Brown-out Detect/Reset, LED, LVD, POR, PWM, Temp Sensor, WDT	Brown-out Detect/Reset, LED, LVD, POR, PWM, Temp Sensor, WDT

Engineering Selection Recommendations

The Z8F042APJ020EG2156 is a direct substitute for the Z8F042APJ020EC based on identical electrical and mechanical specifications. The primary distinction between these parts is product status and compliance certification:

Z8F042APJ020EC: Obsolete product status; RoHS non-compliant
Z8F042APJ020EG2156: Active product status; ROHS3 compliant

For new designs or systems requiring RoHS3 compliance, the Z8F042APJ020EG2156 is the appropriate selection. Both parts share identical core functionality, memory configuration, I/O capability, and operating parameters. Pin-for-pin compatibility and software compatibility are maintained across both variants.

Frequently Asked Questions (FAQ)

Q: Are Z8F042APJ020EC and Z8F042APJ020EG2156 pin-for-pin compatible?

A: Yes. Both devices use the 28-DIP package with identical pinout, voltage supply requirements, and I/O configuration. Direct socket substitution is possible without PCB modification.

Q: What is the difference between these two part numbers?

A: The primary differences are product lifecycle status and regulatory compliance. The Z8F042APJ020EG2156 is an active product with ROHS3 compliance, while the Z8F042APJ020EC is obsolete and RoHS non-compliant. Electrical and functional specifications are identical.

Q: Can I use Z8F042APJ020EG2156 in place of Z8F042APJ020EC in existing designs?

A: Yes. The substitute part maintains full compatibility with existing firmware, PCB layouts, and system designs. No design changes are required.

Q: Are there any packaging differences?

A: The Z8F042APJ020EC is supplied in standard packaging, while the Z8F042APJ020EG2156 is supplied in tube packaging. Both use the same 28-DIP (0.600", 15.24mm) physical package.

Q: What memory specifications should I verify for substitution?

A: Confirm that your application requires exactly 4KB FLASH program memory, 1KB RAM, and 128 bytes EEPROM. Both substitute parts provide identical memory configuration.

Q: Are the operating temperature ranges the same?

A: Yes. Both parts operate across -40°C to 105°C ambient temperature range, suitable for industrial and extended-temperature applications.

Q: What is the significance of ROHS3 compliance on the substitute part?

A: ROHS3 compliance indicates the Z8F042APJ020EG2156 meets current Restriction of Hazardous Substances regulations. This is relevant for applications subject to environmental or procurement standards requiring RoHS compliance.

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