EZ80L92AZ020SG - eZ80 8-Bit MCU 20MHz ROMless LQFP-100 | Zilog
料号： EZ80L92AZ020SG ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $25.3125 | $25.31 |
| 10 | $18.2813 | $182.81 |
| 100 | $16.1719 | $1,617.19 |
| 500 | $15.4688 | $7,734.40 |
| 1,000 | $14.7656 | $14,765.60 |
EZ80L92AZ020SG 概述
An 8-bit ROMless microcontroller is a class of embedded processor that executes program code stored entirely in external memory devices rather than on-chip flash or ROM. The ROMless approach gives system designers freedom to select external flash size, update firmware in the field, and build modular memory subsystems. The eZ80 core is a Z80-compatible architecture that executes instructions roughly 3x faster than a classic Z80 at the same clock frequency, while remaining binary-compatible with the vast Z80 software ecosystem.
Key features of the EZ80L92AZ020SG include the 20 MHz eZ80 core, 24-bit linear address space supporting up to 16 MB of external memory, two UARTs with IrDA support, I2C and SPI serial interfaces, and six 16-bit timers. The device is lead-free and qualified for standard commercial temperature operation.
Technically, the eZ80L92 integrates a Z80-compatible CPU core with a rich on-chip peripheral set and an external bus controller, enabling designs that mix legacy Z80 code with modern peripherals. The wide external memory interface allows glueless connection of SRAM, flash, and Ethernet companion devices from the eZ80 Acclaim! family ecosystem.
Typical applications include industrial control systems, legacy Z80 equipment upgrades, Ethernet-connected embedded modules (such as the eZ80L92 module reference design), data loggers, and communication interface bridges.
When designing with this ROMless device, budget external flash access wait states and lay out the address/data bus with controlled trace lengths for reliable 20 MHz operation.
This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
直接替换替代料： EZ80L92AZ020SG ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
EZ80L92AZ020EC
📋 参考替代料（不在目录中）
EZ80L92AZ020EG
📋 参考替代料（不在目录中）
EZ80L92AZ020SG 最大额定值与电气特性
| Core Architecture | eZ80 (Z80-compatible) 8-bit |
| CPU Clock Frequency | 20 MHz |
| Program Memory Type | ROMless (external memory) |
| Address Space | 24-bit linear, up to 16 MB external |
| UART Interfaces | 2 UARTs with IrDA |
| I2C Interface | Yes |
| SPI Interface | Yes |
| Timers | 6 x 16-bit timers |
| 封装 | 100-pin LQFP |
| 安装类型 | Surface Mount |
| Temperature Grade | Standard (commercial) |
| Lead Free | Yes |
| Product Family | eZ80 Acclaim! |
| RoHS 状态 | Lead-free per Future Electronics listing |
EZ80L92AZ020SG 100-pin lqfp 引脚配置指南
EZ80L92AZ020SG（100-pin lqfp 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： EZ80L92AZ020SG.
请参阅 数据手册 以查看完整引脚配置。
典型应用
EZ80L92AZ020SG 适用于 6 应用s: Industrial Control Systems, Ethernet-Connected Embedded Modules, Legacy Z80 Equipment Upgrades, Data Loggers, Communication Interface Bridges, Embedded Systems Education and Prototyping.
Industrial Control Systems
The EZ80L92AZ020SG fits industrial control applications where deterministic 8-bit control, rich serial connectivity, and long product lifecycles matter. Its 20 MHz eZ80 core executes Z80-compatible code roughly three times faster than a legacy Z80 at the same clock, letting manufacturers modernize proven Z80 control firmware without rewriting it. The two UARTs with IrDA, I2C, and SPI interfaces connect PLC peripherals, operator panels, and field sensors, while six 16-bit timers handle PWM outputs and event measurement. Because program memory is external, firmware can be stored on replaceable or field-updatable flash, simplifying maintenance on machines with decade-long service lives.
推荐
Ethernet-Connected Embedded Modules
Zilog's own eZ80L92 module reference design demonstrates the part's role in compact Ethernet-connected modules, where the ROMless architecture allows program code to reside in external flash alongside the network stack. The 24-bit linear address space up to 16 MB accommodates TCP/IP stacks, web servers, and data buffers that exceed the reach of classic Z80 banking schemes. Two UARTs provide debugging and auxiliary communication channels while SPI and I2C connect PHY-adjacent devices and EEPROM. Designers should budget external bus wait states for flash access to sustain responsive networking at 20 MHz, trading a small performance margin for full firmware field-update capability.
推荐
Legacy Z80 Equipment Upgrades
The eZ80 core is binary-compatible with Z80 software, making the EZ80L92AZ020SG a direct upgrade path for legacy Z80-based equipment such as test instruments, industrial controllers, and retrocomputing platforms. Existing Z80 assembly and C code executes without modification, but roughly three times faster at the same clock frequency, and the 24-bit linear address mode removes the 64 KB banking burden of the original architecture. The ROMless operation allows designers to preserve original external EPROM/flash footprints, minimizing PCB changes. Peripherals such as two UARTs with IrDA add modern connectivity to refreshed hardware while maintaining the original system's software investment.
推荐
Data Loggers
For data acquisition and logging products, the EZ80L92AZ020SG offers six 16-bit timers for precise sample scheduling, SPI for high-speed connection to external flash or SD-card interfaces, and I2C for sensor attachment. The 16 MB external address space supports large code plus data-buffering schemes without memory-management complexity. Its UART with IrDA enables wireless data offload to handheld collection terminals in industrial settings. The ROMless design lets manufacturers split bootloader, application, and logging firmware across separate external memory devices, enabling safe field updates of logging algorithms without touching the recovery boot region stored in protected flash.
推荐
Communication Interface Bridges
With two UARTs, I2C, and SPI available simultaneously, the EZ80L92AZ020SG serves well as a protocol converter bridging serial formats - for example, RS-232 equipment talking to I2C sensor buses, or SPI peripherals interfacing to UART-based modems. The IrDA-capable UARTs add short-range infrared links to legacy serial flows. Running at 20 MHz, the eZ80 core comfortably services interrupt-driven multi-protocol traffic while Z80-compatible development toolchains keep firmware maintenance accessible to teams with decades of Z80 expertise. External program memory allows protocol stacks to be updated independently of the base hardware as interface standards evolve.
推荐
Embedded Systems Education and Prototyping
The eZ80L92 is well suited to teaching embedded architecture concepts because it combines the historically documented Z80 instruction set - rich in educational resources - with modern peripherals like I2C, SPI, and IrDA UARTs. Students can write Z80 assembly in familiar toolchains, then progress to C development exploiting the 24-bit linear addressing mode. The ROMless design makes external memory transparent, giving learners direct visibility of address/data bus behavior, wait states, and memory maps that single-chip flash MCUs hide. Six 16-bit timers and multiple serial ports support progressively complex laboratory projects, from blinking LEDs to multi-node serial networks.
推荐
推荐产品汇总
工程参考数据： EZ80L92AZ020SG ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | EZ80L92AZ020EC | EZ80L92AZ020EG | |
|---|---|---|---|---|
| Package | 100-pin LQFP | 100-pin LQFP - same | 100-pin LQFP - same | |
| Brand | Zilog | Zilog | Zilog | |
| CPU Clock | 20 MHz | 20 MHz | 20 MHz | |
| Core | eZ80 (Z80-compatible), 8-bit | eZ80, 8-bit - same | eZ80, 8-bit - same | |
| Program Memory | ROMless (external) | ROMless (external) | ROMless (external) | |
| UARTs | 2 (with IrDA) | 2 (with IrDA) | 2 (with IrDA) | |
| Timers | 6 x 16-bit | 6 x 16-bit | 6 x 16-bit | |
| Key Difference | S suffix lead finish (Pb-free) | C suffix lead finish | complete replacement, no modification required | E suffix lead finish/plating option |
关键差异点
- Z80 binary code compatibility at 3x speed （对比 Legacy Z80 CPUs (e.g., Z84C00))
- ROMless flexibility over flash-internal eZ80 variants （对比 EZ80F91 (flash-based eZ80 family))
- Identical-footprint replacement availability （对比 EZ80L92AZ020EC)
设计说明
Because the EZ80L92AZ020SG is ROMless, the external address/data bus carries every program fetch at 20 MHz. Keep address, data, and control (RD/WR/MREQ) traces under 10 cm where possible, route as short matched groups, and place 22-33 ohm series resistors on address lines if traces have stubs or connect to socketed flash. Use a solid ground plane under the bus to control impedance and reduce crosstalk between the 8-bit data bus and higher address lines.
Verify that the external program flash access time meets the eZ80 bus timing at 20 MHz with your configured wait states; if a slower memory device is used, add the appropriate number of memory wait states in the eZ80 external bus controller registers rather than dropping the CPU clock. Estimate decoupling at one 0.1 uF ceramic capacitor per supply pin pair plus one bulk 10 uF per power rail, placed within 5 mm of the LQFP power pins.
Do not confuse the Zilog suffixes: the AZ020SG (S suffix), AZ020EG, and AZ020EC differ in lead finish/plating and sometimes temperature designation, not function - but confirm the exact suffix meaning in the official Zilog ordering-information table before second-sourcing, since assembly solderability profiles may differ between lead finishes. Also note Mouser's snippet describing a '50MHz 64Kb Flash' variant appears to reference a different eZ80 listing; the DigiKey and Future Electronics data (20 MHz, ROMless, 100-pin LQFP) is the authoritative specification for the AZ020SG.
合规信息
Future Electronics explicitly states the EZ80L92AZ020SG is lead free and a standard-temperature device. Formal RoHS/REACH declarations not found in the provided data - request current CoC from Zilog.
