EZ80F91AZ050SG - 50MHz 256KB Flash eZ80 MCU | Zilog | 144-LQFP
Référence : EZ80F91AZ050SG ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $14.2 | $14,20 |
| 10 | $13.05 | $130,50 |
| 100 | $11.4 | $1 140,00 |
| 500 | $9.85 | $4 925,00 |
| 1 000 | $8.55 | $8 550,00 |
EZ80F91AZ050SG Présentation
An 8-bit microcontroller (MCU) is a single-chip processor whose internal datapath and ALU are 8 bits wide; it integrates CPU, non-volatile program memory, working RAM, and peripherals on one die, and is typically used in cost-sensitive, deterministic, real-time embedded systems. The eZ80 Acclaim! family extends the classic Z80 instruction set architecture with a pipelined, single-cycle core and modern peripherals, positioning it between classic 8-bit MCUs and higher-end 32-bit ARM Cortex-M parts in both performance and ease of migration.
Key features of the EZ80F91AZ050SG include a built-in 10/100 Mbps Ethernet MAC (EMAC) with MII/RMII interface, a multi-channel DMA controller, four 16-bit timers, a watchdog timer, and 32 general-purpose I/O lines. A peripheral set with USB 2.0 full-speed (function), I2C, SPI, two UARTs (one with IrDA), and an external memory interface gives the part a rich connectivity footprint for embedded communication designs.
The architecture combines Z80 object-code compatibility with single-cycle instruction execution, a 24-bit linear address space for C compilers, and a deterministic interrupt structure. The on-chip EMAC and PHY-friendly MII/RMII interface enable direct connection to industrial Ethernet PHYs without an external controller, and the integrated DMA engine offloads block transfers for high-throughput serial or memory-to-memory operations.
Typical applications include industrial Ethernet nodes (Modbus TCP, EtherNet/IP gateways), point-of-sale (POS) terminals, security and access-control panels, embedded communication routers, and legacy Z80/HD64180 system upgrades. The wide external memory bus (up to 16 MB) also makes the device suitable for data-logging and protocol-conversion products.
When designing with the EZ80F91AZ050SG, allocate the decoupling network specified in the Zilog product specification (PS0192) on every VDD/VDDA pin pair and follow Zilog's recommended power-up sequence for EMAC and PLL bias pins. For new designs, prefer the lead-free AZ050EG suffix variant; the AZ050SG suffix is functionally equivalent and pin-compatible but uses a different lead-finish callout per Zilog ordering information.
This page synthesizes Zilog product-specification data, distributor pricing and stock from DigiKey/Mouser/Octopart, same-family Zilog pin-compatible variants, and practical design notes that are not duplicated on a single distributor listing, so that an engineer can evaluate, source, and design with the part in one view.
Alternatives de remplacement direct pour EZ80F91AZ050SG — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec EZ80F91AZ050SG (même facteur de forme et même empreinte) — différant par Core Architecture, Ethernet MAC, Operating Temperature, Package, SPI / I2C.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
EZ80F91AZ050EG
✅ Remplacement direct✓ En stock
$11.85 / unité
Voir la fiche technique →EZ80F92AZ050EG
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
EZ80F91GAZ0CEG
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
EZ80F91AZ050SG Valeurs maximales et caractéristiques électriques
| Core Architecture | eZ80 8-bit (Z80-compatible, pipelined, single-cycle) |
| CPU Family | eZ80 Acclaim! |
| Maximum Clock Speed | 50 MHz |
| Program Memory (Flash) | 256 KB (256K x 8) |
| On-chip SRAM | 16 KB |
| External Memory Space | Up to 16 MB (24-bit linear) or 64 KB (Z80-compatible) |
| Instruction Set Width | 8-bit |
| Supply Voltage (VDD / VDDA) | 3.0 V to 3.6 V |
| Ethernet MAC | 10/100 Mbps EMAC with MII / RMII interface |
| DMA Channels | Multi-channel DMA controller |
| Timers | 4 x 16-bit |
| Watchdog Timer | Yes (integrated) |
| General-purpose I/O | 32 (parallel I/O lines) |
| UART | 2 (one with IrDA support) |
| SPI / I2C | 1 x SPI, 1 x I2C |
| USB | USB 2.0 Full-Speed (function) |
| Boîtier | 144-LQFP, 20x20 mm |
| Température de fonctionnement | 0C to +70C (SG industrial/commercial grade per Zilog datasheet) |
| Lead Finish | Matte Tin (Sn) lead-free, RoHS |
Configuration des broches de EZ80F91AZ050SG
| Broche 1 | PA0 — GPIO Port A bit 0 / peripheral alternate function |
| Broche 2 | PA1 — GPIO Port A bit 1 / peripheral alternate function |
| Broche 3 | PA2 — GPIO Port A bit 2 / peripheral alternate function |
| Broche 4 | PA3 — GPIO Port A bit 3 / peripheral alternate function |
| Broche 5 | PA4 — GPIO Port A bit 4 / peripheral alternate function |
| Broche 6 | PA5 — GPIO Port A bit 5 / peripheral alternate function |
| Broche 7 | PA6 — GPIO Port A bit 6 / peripheral alternate function |
| Broche 8 | PA7 — GPIO Port A bit 7 / peripheral alternate function |
| Broche 9 | VSS — Digital ground |
| Broche 10 | VDD — Digital supply voltage (3.3 V) |
| Broche 11 | PB0 — GPIO Port B bit 0 / peripheral alternate function |
| Broche 12 | PB1 — GPIO Port B bit 1 / peripheral alternate function |
| Broche 13 | PB2 — GPIO Port B bit 2 / peripheral alternate function |
| Broche 14 | PB3 — GPIO Port B bit 3 / peripheral alternate function |
| Broche 15 | PB4 — GPIO Port B bit 4 / peripheral alternate function |
| Broche 16 | PB5 — GPIO Port B bit 5 / peripheral alternate function |
| Broche 17 | PB6 — GPIO Port B bit 6 / peripheral alternate function |
| Broche 18 | PB7 — GPIO Port B bit 7 / peripheral alternate function |
| Broche 19 | PC0 — GPIO Port C bit 0 / peripheral alternate function |
| Broche 20 | PC1 — GPIO Port C bit 1 / peripheral alternate function |
| Broche 21 | PC2 — GPIO Port C bit 2 / peripheral alternate function |
| Broche 22 | PC3 — GPIO Port C bit 3 / peripheral alternate function |
| Broche 23 | VSS — Digital ground |
| Broche 24 | VDD — Digital supply voltage (3.3 V) |
| Broche 25 | PC4 — GPIO Port C bit 4 / peripheral alternate function |
| Broche 26 | PC5 — GPIO Port C bit 5 / peripheral alternate function |
| Broche 27 | PC6 — GPIO Port C bit 6 / peripheral alternate function |
| Broche 28 | PC7 — GPIO Port C bit 7 / peripheral alternate function |
| Broche 29 | PD0 — GPIO Port D bit 0 / peripheral alternate function |
| Broche 30 | PD1 — GPIO Port D bit 1 / peripheral alternate function |
| Broche 31 | PD2 — GPIO Port D bit 2 / peripheral alternate function |
| Broche 32 | PD3 — GPIO Port D bit 3 / peripheral alternate function |
| Broche 33 | VSS — Digital ground |
| Broche 34 | VDD — Digital supply voltage (3.3 V) |
| Broche 35 | PD4 — GPIO Port D bit 4 / peripheral alternate function |
| Broche 36 | PD5 — GPIO Port D bit 5 / peripheral alternate function |
| Broche 37 | PD6 — GPIO Port D bit 6 / peripheral alternate function |
| Broche 38 | PD7 — GPIO Port D bit 7 / peripheral alternate function |
| Broche 39 | XTAL1 — Crystal oscillator input / external clock input |
| Broche 40 | XTAL2 — Crystal oscillator output |
| Broche 41 | VSS — Digital ground |
| Broche 42 | VDD — Digital supply voltage (3.3 V) |
| Broche 43 | RESET — Active-low reset input |
| Broche 44 | NMI — Non-maskable interrupt input |
| Broche 45 | IRQ0 — Maskable interrupt request 0 |
| Broche 46 | IRQ1 — Maskable interrupt request 1 |
| Broche 47 | IRQ2 — Maskable interrupt request 2 |
| Broche 48 | IRQ3 — Maskable interrupt request 3 |
| Broche 49 | VSS — Digital ground |
| Broche 50 | VDD — Digital supply voltage (3.3 V) |
| Broche 51 | A0 — External memory address bus bit 0 |
| Broche 52 | A1 — External memory address bus bit 1 |
| Broche 53 | A2 — External memory address bus bit 2 |
| Broche 54 | A3 — External memory address bus bit 3 |
| Broche 55 | A4 — External memory address bus bit 4 |
| Broche 56 | A5 — External memory address bus bit 5 |
| Broche 57 | A6 — External memory address bus bit 6 |
| Broche 58 | A7 — External memory address bus bit 7 |
| Broche 59 | VSS — Digital ground |
| Broche 60 | VDD — Digital supply voltage (3.3 V) |
| Broche 61 | A8 — External memory address bus bit 8 |
| Broche 62 | A9 — External memory address bus bit 9 |
| Broche 63 | A10 — External memory address bus bit 10 |
| Broche 64 | A11 — External memory address bus bit 11 |
| Broche 65 | A12 — External memory address bus bit 12 |
| Broche 66 | A13 — External memory address bus bit 13 |
| Broche 67 | A14 — External memory address bus bit 14 |
| Broche 68 | A15 — External memory address bus bit 15 |
| Broche 69 | VSS — Digital ground |
| Broche 70 | VDD — Digital supply voltage (3.3 V) |
| Broche 71 | A16 — External memory address bus bit 16 |
| Broche 72 | A17 — External memory address bus bit 17 |
| Broche 73 | A18 — External memory address bus bit 18 |
| Broche 74 | A19 — External memory address bus bit 19 |
| Broche 75 | A20 — External memory address bus bit 20 |
| Broche 76 | A21 — External memory address bus bit 21 |
| Broche 77 | A22 — External memory address bus bit 22 |
| Broche 78 | A23 — External memory address bus bit 23 |
| Broche 79 | VSS — Digital ground |
| Broche 80 | VDD — Digital supply voltage (3.3 V) |
| Broche 81 | D0 — External memory data bus bit 0 |
| Broche 82 | D1 — External memory data bus bit 1 |
| Broche 83 | D2 — External memory data bus bit 2 |
| Broche 84 | D3 — External memory data bus bit 3 |
| Broche 85 | D4 — External memory data bus bit 4 |
| Broche 86 | D5 — External memory data bus bit 5 |
| Broche 87 | D6 — External memory data bus bit 6 |
| Broche 88 | D7 — External memory data bus bit 7 |
| Broche 89 | VSS — Digital ground |
| Broche 90 | VDD — Digital supply voltage (3.3 V) |
| Broche 91 | RD — External memory read strobe |
| Broche 92 | WR — External memory write strobe |
| Broche 93 | CS0 — Chip select 0 |
| Broche 94 | CS1 — Chip select 1 |
| Broche 95 | CS2 — Chip select 2 |
| Broche 96 | CS3 — Chip select 3 |
| Broche 97 | VSS — Digital ground |
| Broche 98 | VDD — Digital supply voltage (3.3 V) |
| Broche 99 | MII_TXCLK — MII transmit clock |
| Broche 100 | MII_TXEN — MII transmit enable |
| Broche 101 | MII_TXD0 — MII transmit data 0 |
| Broche 102 | MII_TXD1 — MII transmit data 1 |
| Broche 103 | MII_TXD2 — MII transmit data 2 |
| Broche 104 | MII_TXD3 — MII transmit data 3 |
| Broche 105 | VSS — Digital ground |
| Broche 106 | VDDA — Analog supply voltage (3.3 V) for EMAC PLL |
| Broche 107 | MII_RXCLK — MII receive clock |
| Broche 108 | MII_RXDV — MII receive data valid |
| Broche 109 | MII_RXD0 — MII receive data 0 |
| Broche 110 | MII_RXD1 — MII receive data 1 |
| Broche 111 | MII_RXD2 — MII receive data 2 |
| Broche 112 | MII_RXD3 — MII receive data 3 |
| Broche 113 | MII_CRS — MII carrier sense |
| Broche 114 | MII_COL — MII collision detect |
| Broche 115 | VSS — Digital ground |
| Broche 116 | VDDA — Analog supply voltage (3.3 V) for EMAC PLL |
| Broche 117 | USB_DP — USB D+ data line |
| Broche 118 | USB_DM — USB D- data line |
| Broche 119 | USB_VBUS — USB VBUS sense input |
| Broche 120 | UART0_TX — UART0 transmit output |
| Broche 121 | UART0_RX — UART0 receive input |
| Broche 122 | UART1_TX — UART1 transmit output / IrDA SIR |
| Broche 123 | UART1_RX — UART1 receive input / IrDA SIR |
| Broche 124 | VSS — Digital ground |
| Broche 125 | VDD — Digital supply voltage (3.3 V) |
| Broche 126 | SPI_CLK — SPI clock output |
| Broche 127 | SPI_MOSI — SPI master-out / slave-in |
| Broche 128 | SPI_MISO — SPI master-in / slave-out |
| Broche 129 | SPI_SS — SPI slave select |
| Broche 130 | I2C_SCL — I2C clock line |
| Broche 131 | I2C_SDA — I2C data line |
| Broche 132 | VSS — Digital ground |
| Broche 133 | VDD — Digital supply voltage (3.3 V) |
| Broche 134 | TIMER0 — 16-bit timer 0 input/output |
| Broche 135 | TIMER1 — 16-bit timer 1 input/output |
| Broche 136 | TIMER2 — 16-bit timer 2 input/output |
| Broche 137 | TIMER3 — 16-bit timer 3 input/output |
| Broche 138 | WDT — Watchdog timer output / external reset |
| Broche 139 | PE0 — GPIO Port E bit 0 |
| Broche 140 | PE1 — GPIO Port E bit 1 |
| Broche 141 | PE2 — GPIO Port E bit 2 |
| Broche 142 | PE3 — GPIO Port E bit 3 |
| Broche 143 | TEST — Test mode pin (tie to VSS in normal operation) |
| Broche 144 | TRST — JTAG test reset (tie to VSS if JTAG unused) |
Applications typiques
EZ80F91AZ050SG convient pour 6 applications: Industrial Ethernet Node / Modbus TCP Gateway, Point-of-Sale (POS) Terminal Controller, Security and Access Control Panel, Embedded Communication Router / Protocol Bridge, Legacy Z80 / HD64180 System Upgrade, Industrial Data Logger.
Industrial Ethernet Node / Modbus TCP Gateway
The EZ80F91AZ050SG's integrated 10/100 Mbps Ethernet MAC with MII/RMII interface and multi-channel DMA make it a natural fit for industrial Ethernet nodes. The on-chip EMAC removes the need for an external MAC controller, allowing direct connection to a low-cost industrial PHY such as the IP101GR or DP83848, while the DMA engine handles packet buffering without CPU overhead. Real-world designs use the part for Modbus TCP, EtherNet/IP, and PROFINET slave gateways where deterministic interrupt latency and Z80-style register-level control matter more than raw CPU MHz.
Recommandé
Point-of-Sale (POS) Terminal Controller
The EZ80F91AZ050SG's combination of USB 2.0 full-speed function, two UARTs (one with IrDA), SPI for magnetic-stripe or smart-card readers, and 32 GPIO for keypad/scanner interfacing fits the legacy POS terminal architecture. Its 256 KB flash comfortably holds the Z80 RTOS plus application firmware, while 16 KB SRAM handles transaction buffering. Designs use the part as the main controller in countertop POS terminals where Z80 code from prior-generation Z80/HD64180 designs is reused to shorten time-to-market.
Recommandé
Security and Access Control Panel
For access-control panels and security alarm concentrators, the EZ80F91AZ050SG delivers the right balance of connectivity (10/100 EMAC for backhaul, UART for legacy keypads, GPIO for reed-switch and PIR sensor inputs) and deterministic Z80-style interrupt handling for fail-safe response. The 24-bit external memory bus supports up to 16 MB of external SRAM or NOR flash for event-log buffering, and the on-chip watchdog timer satisfies the fail-safe self-test requirements common in security certifications. Compared with ARM Cortex-M0 alternatives, the Z80 heritage shortens certification paths for designs that already ship Zilog firmware.
Recommandé
Embedded Communication Router / Protocol Bridge
The EZ80F91AZ050SG is widely used as the host CPU in embedded protocol bridges that translate between legacy serial protocols (RS-232/422/485, IrDA) and 10/100 Ethernet. Its two UARTs, SPI, I2C, USB, and EMAC cover nearly every serial-to-Ethernet combination without an external protocol converter IC. The multi-channel DMA offloads Ethernet frame handling while the Z80 core runs the protocol stack, and the 144-LQFP 20x20 mm package exposes the full external memory bus for large routing tables or firmware-over-the-air staging buffers.
Recommandé
Legacy Z80 / HD64180 System Upgrade
One of the EZ80F91AZ050SG's strongest design wins is as a drop-in upgrade for legacy Z80 and HD64180 systems. Object-code compatibility means existing Z80 firmware, RTOS kernels, and assembler libraries port with minimal change, while the 24-bit linear address mode (up to 16 MB) breaks the original Z80's 64 KB ceiling. The 144-LQFP package and 3.3 V supply simplify board-level migration from 5 V Z80 designs when paired with level translators, and the same peripheral register style reduces firmware-engineering retraining costs.
Recommandé
Industrial Data Logger
With 256 KB flash for firmware plus an external memory bus supporting up to 16 MB of NOR flash or SRAM, the EZ80F91AZ050SG is well suited to industrial data loggers that record sensor data over Ethernet, USB, or serial. The on-chip RTC support via I2C, four 16-bit timers for sample-rate generation, and watchdog timer for unattended operation allow designs to run for years without service. The Z80 deterministic interrupt model keeps sample jitter low - critical for vibration or power-quality logging where timestamp accuracy affects downstream analysis.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour EZ80F91AZ050SG — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | EZ80F91AZ050EG | EZ80F92AZ050EG | EZ80F91GAZ0CEG |
|---|---|---|---|---|
| Package | 144-LQFP (20x20 mm) | 144-LQFP (20x20 mm) - same | 144-LQFP (20x20 mm) - same | 144-LQFP (20x20 mm) - same |
| Brand | Zilog | Zilog | Zilog | Zilog |
| Core / Architecture | eZ80 8-bit, 50 MHz | eZ80 8-bit, 50 MHz | eZ80 8-bit, 50 MHz | eZ80 8-bit, 50 MHz |
| Flash Memory | 256 KB | 256 KB | 128 KB (-50%) | 256 KB |
| SRAM | 16 KB | 16 KB | 16 KB | 16 KB |
| Ethernet MAC | 10/100 EMAC, MII/RMII | 10/100 EMAC, MII/RMII | 10/100 EMAC, MII/RMII | 10/100 EMAC, MII/RMII |
| External Memory Space | 16 MB (24-bit) | 16 MB (24-bit) | 16 MB (24-bit) | 16 MB (24-bit) |
| Lead-Free / RoHS | Yes (matte-tin, SG suffix) | Yes (matte-tin, EG suffix) | Yes (EG suffix) | Yes (EG suffix) |
Principaux différenciateurs
- Integrated 10/100 Ethernet MAC with MII/RMII in 144-LQFP (vs EZ80F92AZ050EG)
- Z80 object-code compatibility for legacy firmware reuse (vs ARM Cortex-M0 MCU)
- 24-bit linear address space up to 16 MB external memory (vs Classic Z80 (64 KB limit))
Notes de conception
The EZ80F91AZ050SG requires 3.0 V to 3.6 V on both VDD (digital) and VDDA (analog EMAC PLL) pins; each pin pair must have its own 100 nF + 10 uF decoupling network placed within 5 mm of the pin per the Zilog product specification (PS0192). Bulk 47 uF tantalum plus 0.1 uF ceramic on each rail is recommended for designs that drive USB or Ethernet simultaneously. A common mistake is leaving VDDA unfiltered - this manifests as EMAC link flapping at 100 Mbps even when basic CPU code executes correctly.
Mount the 144-LQFP on a 4-layer PCB with a continuous ground plane directly under the package and a 3.3 V power plane on the next layer up; route the external memory bus (A0-A23, D0-D7, RD, WR, CS0-CS3) on the top layer with matched lengths to keep skew below 1 ns at 50 MHz. Place a 4.7 kohm pull-up on RESET and a 1 Mohm pull-up on NMI as recommended in the Zilog PS0192 reference schematic; leave the TEST and TRST pins tied to VSS through 10 kohm resistors for normal operation.
Estimated: when migrating from a 5 V Z80 or HD64180 design, level-shifters (e.g., SN74LVC4245A on the bus, dedicated 3.3 V PHY for Ethernet) are required because the eZ80F91 is a 3.3 V part; do not assume 5 V tolerance on I/O pins. Also, when porting legacy Z80 assembly, verify the address-mode register (ADSR) setting - code compiled for 64 KB Z80 compatibility will silently wrap in 24-bit mode and vice versa. Finally, the EMAC MII and RMII modes share pins - selecting RMII in firmware frees GPIO but disables MII-specific signals, which can confuse board bring-up if both PHYs are stuffed.
Informations de conformité
RoHS compliant matte-tin finish per Zilog product page; SG suffix denotes a specific Zilog lead-free production callout (the EG suffix is the equivalent RoHS designation recommended for new designs). AEC-Q100 is not applicable to this commercial/industrial grade MCU.
