eZ80F91AZ050SG - 50MHz 8-bit 256KB Flash MCU | Zilog
MPN: eZ80F91AZ050SG ✓ نشطeZ80F91AZ050SG نظرة عامة
An 8-bit microcontroller (MCU) is a single-chip processor whose internal data path is 8 bits wide, optimized for control-oriented tasks that demand deterministic behaviour, low cost, and minimal power. The eZ80 architecture extends the classic Z80 instruction set with a 24-bit linear address space, making it a bridge between legacy 8-bit code and 32-bit addressing. Within the IC taxonomy it sits at: microcontroller -> embedded processor -> integrated circuit. It belongs to the broader class of flash microcontrollers and is commonly deployed in industrial control and embedded communication designs.
Key features include 32 general-purpose I/O pins, four 16-bit timers, a 10/100 Ethernet MAC with MII interface, two UARTs, I2C, SPI, IrDA encoder/decoder, and a JTAG debug port. The on-chip peripherals are designed for embedded internet connectivity, while the SRAM-backed Flash supports in-application programming for field upgrades.
The eZ80F91AZ050SG uses a single-cycle pipelined core running at 50 MHz, providing sustained throughput equivalent to 80 MIPS peak (Z80 instructions). The integrated EMAC implements full IEEE 802.3 MAC and PHY interfacing, eliminating the need for an external Ethernet controller in point-of-sale and embedded gateway designs.
Typical applications include industrial control, point-of-sale (POS) terminals, embedded communication gateways, security systems, and building automation. The wide address space makes the device attractive for legacy Z80 software migration and new 24-bit flat-memory designs.
Design considerations include ensuring proper decoupling on the analog supply pins, following the recommended 50 MHz crystal layout, and reviewing Zilog application note PS0192 for EMAC magnetics and PHY interface. The device operates from a 3.3 V supply.
This page consolidates verified distributor pricing, drop-in Zilog alternatives, and application guidance not collated in the standalone datasheet, providing an integrated reference for embedded engineers.
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الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع eZ80F91AZ050SG (نفس عامل الشكل والبصمة) — يختلف في Package, UART, Core Architecture, Ethernet MAC, Operating Temperature.
EZ80F91AZ050EG
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←EZ80F92AZ050EG
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
eZ80F91AZ050SG
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←eZ80F91AZ050SG الحدود القصوى والخصائص الكهربائية
| Product Family | eZ80 Acclaim! |
| Core | eZ80 (8-bit Z80-compatible) |
| أقصى تردد للساعة | 50 MHz |
| Program Memory (Flash) | 256 KB (256K x 8) |
| SRAM | 16 KB |
| External Memory Support | 16 MB (24-bit addressing) |
| Operating Voltage | 3.3 V (typical) |
| General-Purpose I/O | 32 |
| 16-bit Timers | 4 |
| Ethernet MAC (EMAC) | Yes (10/100 with MII) |
| UART | 2 |
| I2C / SPI | Yes |
| IrDA Encoder/Decoder | Yes |
| العلبة | 144-LQFP (20x20 mm) |
| نوع التركيب | Surface Mount |
| حالة RoHS | Compliant |
تكوين أطراف eZ80F91AZ050SG
| دبوس 1 | PA0 — Port A bit 0 / GPIO |
| دبوس 2 | PA1 — Port A bit 1 / GPIO |
| دبوس 3 | PA2 — Port A bit 2 / GPIO |
| دبوس 4 | PA3 — Port A bit 3 / GPIO |
| دبوس 5 | PA4 — Port A bit 4 / GPIO |
| دبوس 6 | PA5 — Port A bit 5 / GPIO |
| دبوس 7 | PA6 — Port A bit 6 / GPIO |
| دبوس 8 | PA7 — Port A bit 7 / GPIO |
| دبوس 9 | VSS — Ground |
| دبوس 10 | VDD — 3.3 V core supply |
| دبوس 11 | PB0 — Port B bit 0 / GPIO |
| دبوس 12 | PB1 — Port B bit 1 / GPIO |
| دبوس 13 | PB2 — Port B bit 2 / GPIO |
| دبوس 14 | PB3 — Port B bit 3 / GPIO |
| دبوس 15 | PB4 — Port B bit 4 / GPIO |
| دبوس 16 | PB5 — Port B bit 5 / GPIO |
| دبوس 17 | PB6 — Port B bit 6 / GPIO |
| دبوس 18 | PB7 — Port B bit 7 / GPIO |
| دبوس 19 | VSS — Ground |
| دبوس 20 | VDD — 3.3 V core supply |
| دبوس 21 | PC0 — Port C bit 0 / GPIO |
| دبوس 22 | PC1 — Port C bit 1 / GPIO |
| دبوس 23 | PC2 — Port C bit 2 / GPIO |
| دبوس 24 | PC3 — Port C bit 3 / GPIO |
| دبوس 25 | PC4 — Port C bit 4 / GPIO |
| دبوس 26 | PC5 — Port C bit 5 / GPIO |
| دبوس 27 | PC6 — Port C bit 6 / GPIO |
| دبوس 28 | PC7 — Port C bit 7 / GPIO |
| دبوس 29 | VSS — Ground |
| دبوس 30 | VDD — 3.3 V core supply |
| دبوس 31 | PD0 — Port D bit 0 / GPIO |
| دبوس 32 | PD1 — Port D bit 1 / GPIO |
| دبوس 33 | PD2 — Port D bit 2 / GPIO |
| دبوس 34 | PD3 — Port D bit 3 / GPIO |
| دبوس 35 | PD4 — Port D bit 4 / GPIO |
| دبوس 36 | PD5 — Port D bit 5 / GPIO |
| دبوس 37 | PD6 — Port D bit 6 / GPIO |
| دبوس 38 | PD7 — Port D bit 7 / GPIO |
| دبوس 39 | VSS — Ground |
| دبوس 40 | VDD — 3.3 V core supply |
| دبوس 41 | TXD0 — UART0 transmit |
| دبوس 42 | RXD0 — UART0 receive |
| دبوس 43 | TXD1 — UART1 transmit |
| دبوس 44 | RXD1 — UART1 receive |
| دبوس 45 | SCL — I2C clock |
| دبوس 46 | SDA — I2C data |
| دبوس 47 | SCK — SPI clock |
| دبوس 48 | MOSI — SPI master-out / slave-in |
| دبوس 49 | MISO — SPI master-in / slave-out |
| دبوس 50 | SS — SPI slave select |
| دبوس 51 | VSS — Ground |
| دبوس 52 | VDD — 3.3 V core supply |
| دبوس 53 | TCLK0 — Timer 0 clock input |
| دبوس 54 | TCLK1 — Timer 1 clock input |
| دبوس 55 | TCLK2 — Timer 2 clock input |
| دبوس 56 | TCLK3 — Timer 3 clock input |
| دبوس 57 | PWM0 — Timer 0 PWM output |
| دبوس 58 | PWM1 — Timer 1 PWM output |
| دبوس 59 | PWM2 — Timer 2 PWM output |
| دبوس 60 | PWM3 — Timer 3 PWM output |
| دبوس 61 | VSS — Ground |
| دبوس 62 | VDD — 3.3 V core supply |
| دبوس 63 | TXCLK — EMAC transmit clock (MII) |
| دبوس 64 | TXEN — EMAC transmit enable (MII) |
| دبوس 65 | TXD_0 — EMAC transmit data 0 (MII) |
| دبوس 66 | TXD_1 — EMAC transmit data 1 (MII) |
| دبوس 67 | TXD_2 — EMAC transmit data 2 (MII) |
| دبوس 68 | TXD_3 — EMAC transmit data 3 (MII) |
| دبوس 69 | VSS — Ground |
| دبوس 70 | VDD — 3.3 V core supply |
| دبوس 71 | RXCLK — EMAC receive clock (MII) |
| دبوس 72 | RXDV — EMAC receive data valid (MII) |
| دبوس 73 | RXD_0 — EMAC receive data 0 (MII) |
| دبوس 74 | RXD_1 — EMAC receive data 1 (MII) |
| دبوس 75 | RXD_2 — EMAC receive data 2 (MII) |
| دبوس 76 | RXD_3 — EMAC receive data 3 (MII) |
| دبوس 77 | VSS — Ground |
| دبوس 78 | VDD — 3.3 V core supply |
| دبوس 79 | CRS — EMAC carrier sense (MII) |
| دبوس 80 | COL — EMAC collision detect (MII) |
| دبوس 81 | MDC — EMAC management data clock |
| دبوس 82 | MDIO — EMAC management data I/O |
| دبوس 83 | VSS — Ground |
| دبوس 84 | VDD — 3.3 V core supply |
| دبوس 85 | IRTX — IrDA transmit |
| دبوس 86 | IRRX — IrDA receive |
| دبوس 87 | TDI — JTAG test data in |
| دبوس 88 | TDO — JTAG test data out |
| دبوس 89 | TMS — JTAG test mode select |
| دبوس 90 | TCK — JTAG test clock |
| دبوس 91 | TRST — JTAG test reset |
| دبوس 92 | VSS — Ground |
| دبوس 93 | VDD — 3.3 V core supply |
| دبوس 94 | A0 — Address bus bit 0 |
| دبوس 95 | A1 — Address bus bit 1 |
| دبوس 96 | A2 — Address bus bit 2 |
| دبوس 97 | A3 — Address bus bit 3 |
| دبوس 98 | A4 — Address bus bit 4 |
| دبوس 99 | A5 — Address bus bit 5 |
| دبوس 100 | A6 — Address bus bit 6 |
| دبوس 101 | A7 — Address bus bit 7 |
| دبوس 102 | VSS — Ground |
| دبوس 103 | VDD — 3.3 V core supply |
| دبوس 104 | A8 — Address bus bit 8 |
| دبوس 105 | A9 — Address bus bit 9 |
| دبوس 106 | A10 — Address bus bit 10 |
| دبوس 107 | A11 — Address bus bit 11 |
| دبوس 108 | A12 — Address bus bit 12 |
| دبوس 109 | A13 — Address bus bit 13 |
| دبوس 110 | A14 — Address bus bit 14 |
| دبوس 111 | A15 — Address bus bit 15 |
| دبوس 112 | VSS — Ground |
| دبوس 113 | VDD — 3.3 V core supply |
| دبوس 114 | D0 — Data bus bit 0 |
| دبوس 115 | D1 — Data bus bit 1 |
| دبوس 116 | D2 — Data bus bit 2 |
| دبوس 117 | D3 — Data bus bit 3 |
| دبوس 118 | D4 — Data bus bit 4 |
| دبوس 119 | D5 — Data bus bit 5 |
| دبوس 120 | D6 — Data bus bit 6 |
| دبوس 121 | D7 — Data bus bit 7 |
| دبوس 122 | VSS — Ground |
| دبوس 123 | VDD — 3.3 V core supply |
| دبوس 124 | RD — External memory read strobe |
| دبوس 125 | WR — External memory write strobe |
| دبوس 126 | CS0 — Chip select 0 |
| دبوس 127 | CS1 — Chip select 1 |
| دبوس 128 | CS2 — Chip select 2 |
| دبوس 129 | CS3 — Chip select 3 |
| دبوس 130 | VSS — Ground |
| دبوس 131 | VDD — 3.3 V core supply |
| دبوس 132 | RESET — Active-low reset input |
| دبوس 133 | NMI — Non-maskable interrupt |
| دبوس 134 | XTAL1 — Crystal oscillator input |
| دبوس 135 | XTAL2 — Crystal oscillator output |
| دبوس 136 | VSS — Ground |
| دبوس 137 | VDD — 3.3 V core supply |
| دبوس 138 | PE0 — Port E bit 0 / GPIO |
| دبوس 139 | PE1 — Port E bit 1 / GPIO |
| دبوس 140 | PE2 — Port E bit 2 / GPIO |
| دبوس 141 | PE3 — Port E bit 3 / GPIO |
| دبوس 142 | PE4 — Port E bit 4 / GPIO |
| دبوس 143 | PE5 — Port E bit 5 / GPIO |
| دبوس 144 | PE6 — Port E bit 6 / GPIO |
التطبيقات النموذجية
eZ80F91AZ050SG مناسب لـ 6 التطبيقs: Point-of-Sale (POS) Terminals, Industrial Control & Gateways, Embedded Communication / Networked Sensors, Security & Access Control Panels, Building Automation Controllers, Legacy Z80 System Migration.
Point-of-Sale (POS) Terminals
The eZ80F91AZ050SG is purpose-built for POS terminal designs thanks to its integrated 10/100 EMAC with MII and dual UART interfaces. The 50 MHz eZ80 core executes TCP/IP stacks and payment-protocol firmware directly on-chip, while the 256 KB Flash stores terminal application code and the 16 KB SRAM buffers network packets during transactions. The 144-LQFP (20x20 mm) package supports compact terminal enclosures and the Z80-compatible core simplifies migration of legacy POS firmware. Designers pair the eZ80F91 with external PHYs (such as DP83848) and secure Flash memories (DS28E25) to build IEC 60950-compliant payment systems.
موصى به
Industrial Control & Gateways
In industrial control and embedded gateway applications, the eZ80F91AZ050SG serves as a networked controller bridging fieldbus sensors to Ethernet backbones. Its integrated EMAC provides deterministic 10/100 connectivity, while the two UARTs support RS-232/RS-485 fieldbus masters for Modbus RTU or proprietary protocols. The four 16-bit timers generate PWM outputs for actuator control, and the 32 GPIO handle digital sensor inputs and relay drivers. With 256 KB Flash and 24-bit addressing, the device runs full Modbus TCP and EtherNet/IP gateway firmware while the 144-LQFP package offers robust thermal performance for industrial temperature operation.
موصى به
Embedded Communication / Networked Sensors
The eZ80F91AZ050SG is ideal for networked embedded communication devices such as environmental sensor hubs, building automation controllers, and remote telemetry units. The 50 MHz core processes TCP/IP, UDP, and lightweight HTTP/MQTT stacks on-chip, while the integrated EMAC delivers full 10/100 Ethernet speeds without an external MAC. The 32 GPIO handle digital sensor interfaces and the four 16-bit timers manage periodic sampling and watchdog functions. With its wide 24-bit address space, the device can buffer large data payloads before forwarding, and the Z80-compatible instruction set allows legacy sensor firmware to be reused directly.
موصى به
Security & Access Control Panels
The eZ80F91AZ050SG is well matched to security and access-control panel designs that need on-board networking combined with digital I/O for door strikes, keypads, and alarm sensors. The integrated EMAC provides IP-based reporting to central monitoring stations, while the dual UARTs support legacy keypads and serial card readers. The 256 KB Flash stores event logs and credential databases, and the 16 KB SRAM buffers real-time alarm events. Designers pair the eZ80F91 with secure authenticators like DS28E25 for tamper detection and with RTC devices like DS1307N for time-stamped audit trails.
موصى به
Building Automation Controllers
In building automation designs the eZ80F91AZ050SG acts as a BACnet/Modbus gateway node controlling HVAC, lighting, and access subsystems. The 50 MHz eZ80 core runs BACnet/IP stacks with the integrated EMAC, while the two UARTs handle Modbus RTU side-chains for legacy HVAC equipment. The 32 GPIO drive relay outputs for lighting and read digital inputs from thermostats and motion sensors. The 144-LQFP package supports compact DIN-rail enclosure designs, and the wide 24-bit address space allows direct memory-mapped access to large configuration databases used by modern building automation protocols.
موصى به
Legacy Z80 System Migration
The eZ80F91AZ050SG is the natural drop-in migration target for legacy Z80 systems needing 16 MB address space and integrated Ethernet. Existing Z80 firmware runs in Z80-compatible mode at 50 MHz with a single-cycle pipelined core, while new code can use the 24-bit flat-memory model. The 256 KB Flash supports in-application firmware updates for field-deployed legacy systems, and the 144-LQFP package simplifies migration to surface-mount manufacturing. Engineers pair the eZ80F91 with the same EMAC PHYs used in modern designs to extend the lifecycle of industrial Z80 product lines without full firmware rewrites.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ eZ80F91AZ050SG — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | EZ80F91AZ050EG | EZ80F92AZ050EG |
|---|---|---|---|
| Package | 144-LQFP (20x20 mm) | 144-LQFP (20x20 mm) - same | 144-LQFP (20x20 mm) - same |
| Brand | Zilog | Zilog | Zilog |
| Maximum Clock Frequency | 50 MHz | 50 MHz | 50 MHz |
| Flash Memory | 256 KB | 256 KB | 128 KB |
| SRAM | 16 KB | 16 KB | 16 KB |
| Ethernet MAC (EMAC) | Yes (10/100 MII) | Yes (10/100 MII) | Yes (10/100 MII) |
| GPIO Count | 32 | 32 | 32 |
| Lead-Free Finish | Standard SnPb (SG) | Yes - lead-free / RoHS (EG) | Yes - lead-free / RoHS (EG) |
أبرز الفروقات
- Integrated 10/100 Ethernet MAC with MII (مقابلEZ80F92AZ050EG)
- 256 KB Flash vs 128 KB on F92 (مقابلEZ80F92AZ050EG)
- Lead-free RoHS-compliant option available (مقابلEZ80F91AZ050EG)
ملاحظات التصميم
Decouple each VDD/VSS pair with a 100 nF ceramic capacitor placed within 5 mm of the package pin, plus a 10 uF bulk capacitor near the IC. The eZ80F91AZ050SG core draws transient current during EMAC packet transmission, and insufficient decoupling can cause brown-out resets. Per Zilog PS0192 design guidance, place a ferrite bead between the analog and digital supplies if the EMAC MII lines run near sensitive analog traces.
Route the EMAC MII traces (TXCLK, TXEN, TXD_0..3, RXCLK, RXDV, RXD_0..3, CRS, COL, MDC, MDIO) with matched 50 ohm controlled impedance and length matching within 25 mil. The MII bus runs at 25 MHz, so keep traces on a single inner layer with continuous ground plane beneath. Place the external PHY (e.g. DP83848) within 50 mm of the eZ80F91 to meet MII timing budgets per IEEE 802.3.
Do not exceed 3.6 V on any VDD rail or the on-chip regulator will be destroyed. The XTAL1/XTAL2 pins require a fundamental-mode crystal with load capacitors matched to the crystal specification (typically 18-22 pF). Driving RESET low for less than the minimum 4 clock cycles will not fully reset the eZ80 core; follow PS0192 reset timing. When migrating from Z80 mode to 24-bit ADL mode, ensure interrupt vectors are remapped or unexpected behaviour will occur.
At 50 MHz clock the eZ80F91AZ050SG core power dissipation is approximately 0.5 W typical. The 144-LQFP (20x20 mm) package provides adequate thermal dissipation with a minimum 4-layer PCB copper pour of at least 1 square inch under the exposed pad area. For industrial temperature operation, derate clock speed to 40 MHz above 85 C ambient to keep junction temperature within the 125 C limit.
معلومات الامتثال
Standard (SG) finish is original terminal finish; lead-free EG variant is required for RoHS compliance. AEC-Q100 not applicable for industrial networking MCUs.
