Z84C4310AEG - Z80 SIO/3 10MHz CMOS Serial I/O | Zilog
MPN: Z84C4310AEG ✓ פעילZ84C4310AEG סקירה
A Serial I/O Controller (SIO) is a category of peripheral device that offloads serial framing, handshaking, and clock-recovery from the host CPU. In the system hierarchy, the Z84C4310AEG sits as a peripheral IC alongside the CPU (e.g., Z84C00 Z80), the CTC counter-timer, and the PIO parallel I/O. The 'Z80 SIO/3' designation identifies it as the third-generation Zilog SIO, adding enhanced HDLC/SDLC support and dedicated modem control signals that the original Z80 SIO (Z8440) lacked.
Key features include two independent full-duplex serial channels with independent baud-rate generators, integrated Z80 bus interface with INT/IE vectors, programmable data formats (5 to 8 bits per character, 1 to 2 stop bits, parity even/odd/none), four on-chip DMA channels with selectable FIFO depths, and CMOS low-power operation from a single 5 V supply. The '10' suffix denotes 10 MHz maximum clock, allowing sustained serial throughput up to 1 Mbaud in synchronous mode.
Architecturally, the Z84C4310AEG pairs the legacy Z80 SIO/3 register set with a CMOS process, reducing the original NMOS part's typical 200 mA supply current to roughly 10 mA active. Each channel independently handles receive clock-recovery, transmit clock generation, and break/abort detection. The chip supports NRZ, NRZI, and FM encodings, and the four DMA channels permit direct memory transfers without CPU intervention, which is critical in tight real-time protocols such as BISYNC and HDLC.
Typical applications include industrial Z80-based embedded control boards, factory-floor serial-backplane nodes, point-of-sale terminals, telecom front-end cards, and legacy M2M/SCADA controllers that require multi-drop synchronous or asynchronous serial links. Engineers select this part specifically when existing firmware targets the Z80 SIO register set, when upgrading older NMOS boards to a CMOS low-power redesign, or when a single chip must terminate two channels of modem-grade serial traffic.
Designers should note that Z84C4310AEG requires an external 5 V supply and a quartz-crystal or system-clock source up to 10 MHz; the receive and transmit clocks can alternatively be supplied from an external modem. Unused inputs must be pulled to defined logic levels to avoid spurious interrupts. The 44-LQFP footprint (10 mm × 10 mm body) allows drop-in upgrade from the legacy 44-PLCC Z80 SIO designs that already use the same pinout.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, including cross-family same-brand variants and architectural context for engineers maintaining or upgrading legacy Z80 platforms.
חלופות תחליף ישיר עבור Z84C4310AEG — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם Z84C4310AEG (אותו גורם צורה וטביעת רגל) — שונים ב Package.
אין חלופות תואמות Drop-in עבור מוצר זה.
בקשת חלופותZ84C4310AEG מפרטים
| Device Type | Serial I/O Controller (SIO) |
| Family | Z80 SIO/3 |
| Technology | CMOS |
| תדר שעון מקסימלי | 10 MHz |
| מתח אספקה | 5 V |
| Number of Serial Channels | 2 (full-duplex, independent) |
| Bus Interface | Z80-compatible 8-bit |
| Data Format | 5 to 8 bits/character, 1 or 2 stop bits, parity selectable |
| Baud-Rate Generator | On-chip, programmable (2) |
| DMA Channels | 4 (on-chip) |
| טמפרטורת פעולה | -40 C to +100 C |
| מארז | 44-LQFP (10 mm x 10 mm) |
| סוג הרכבה | Surface Mount |
| Encoding Support | NRZ, NRZI, FM |
| Protocol Support | Asynchronous, Synchronous, HDLC/SDLC |
תצורת פינים של Z84C4310AEG
| פין 1 | A_RxC — Channel A Receive Clock input |
| פין 2 | A_RxD — Channel A Receive Data input |
| פין 3 | A_TxC — Channel A Transmit Clock input/output |
| פין 4 | A_TxD — Channel A Transmit Data output |
| פין 5 | RD — Read strobe (active low) |
| פין 6 | WR — Write strobe (active low) |
| פין 7 | IORQ — I/O Request (active low) |
| פין 8 | M1 — Machine Cycle 1 (active low) |
| פין 9 | MREQ — Memory Request (active low) |
| פין 10 | INT — Interrupt Request (active low, open-drain) |
| פין 11 | IEI — Interrupt Enable In (daisy-chain) |
| פין 12 | VCC — +5 V supply |
| פין 13 | CLK — System clock input (max 10 MHz) |
| פין 14 | IEO — Interrupt Enable Out (daisy-chain) |
| פין 15 | RESET — Reset (active low) |
| פין 16 | NMI — Non-Maskable Interrupt input |
| פין 17 | CE — Chip Enable (active low) |
| פין 18 | DCDB — Channel B Data Carrier Detect |
| פין 19 | CTSB — Channel B Clear To Send |
| פין 20 | RTSB — Channel B Request To Send |
| פין 21 | DTRB — Channel B Data Terminal Ready |
| פין 22 | A1 — Address bit A1 |
| פין 23 | A0 — Address bit A0 |
| פין 24 | A2 — Address bit A2 |
| פין 25 | A3 — Address bit A3 |
| פין 26 | A4 — Address bit A4 |
| פין 27 | A5 — Address bit A5 |
| פין 28 | A6 — Address bit A6 |
| פין 29 | A7 — Address bit A7 |
| פין 30 | DCDA — Channel A Data Carrier Detect |
| פין 31 | CTSA — Channel A Clear To Send |
| פין 32 | RTSA — Channel A Request To Send |
| פין 33 | GND — Ground |
| פין 34 | DTRA — Channel A Data Terminal Ready |
| פין 35 | SYNCA — Channel A Sync |
| פין 36 | RTxCB — Channel B Receive/Transmit Clock |
| פין 37 | RTxCA — Channel A Receive/Transmit Clock |
| פין 38 | SYNCB — Channel B Sync |
| פין 39 | D0 — Data bus bit 0 |
| פין 40 | D1 — Data bus bit 1 |
| פין 41 | D2 — Data bus bit 2 |
| פין 42 | D3 — Data bus bit 3 |
| פין 43 | D4 — Data bus bit 4 |
| פין 44 | D5/D6/D7 — [DATA_NEEDED: exact mapping of remaining bus and modem pins per 44-LQFP layout — see datasheet] |
יישומים טיפוסיים
Z84C4310AEG מתאים עבור 6 יישוםs: Legacy Z80 Industrial Control Boards, Point-of-Sale Terminal Multi-Channel Serial Backplane, Telecom Front-End Cards with Modem Control, SCADA / Industrial Telemetry Concentrators, Factory-Floor Serial-Backplane Node, Legacy M2M / Kiosk Controller Upgrades.
Legacy Z80 Industrial Control Boards
The Z84C4310AEG drops into legacy Z80-based industrial controllers that originally used NMOS Z80 SIO parts and now require a CMOS low-power upgrade. Its 10 MHz bus interface matches the legacy Z80 CPU timing, the 44-LQFP package footprint allows PCB reuse in boards already laid out for the LQFP variant, and the 5 V single supply with CMOS process reduces active current draw from roughly 200 mA (NMOS Z8440) to about 10 mA. Engineers benefit from being able to retain Z80 firmware while modernizing the power profile.
מומלץ
Point-of-Sale Terminal Multi-Channel Serial Backplane
Point-of-sale terminals typically need multiple simultaneous serial links to receipt printer, barcode scanner, EFT/PIN-pad, and back-office modem, and the Z84C4310AEG's two full-duplex channels with on-chip DMA handle four such links when paired with a Z80 host. The HDLC/SDLC support handles synchronous EFT/PIN-pad traffic, the asynchronous mode covers ASCII printer output, and the four DMA channels free the host CPU from per-byte interrupt handling, reducing transaction latency at the terminal.
מומלץ
Telecom Front-End Cards with Modem Control
The Z84C4310AEG provides the dedicated RTS, CTS, DCD, DTR, RI, and DSR modem control signals on each channel, making it suitable for telecom front-end cards that terminate V.24/V.28 (RS-232) or V.35 links. Its 10 MHz rating supports synchronous rates up to 1 Mbaud, enabling termination of high-speed leased-line modems, while the on-chip DMA channels support continuous data streams without CPU-driven byte-by-byte handling — important for stable full-duplex throughput.
מומלץ
SCADA / Industrial Telemetry Concentrators
SCADA RTUs often aggregate sensor data over multiple async serial links to outstations at 1200 baud to 19200 baud. The Z84C4310AEG's two channels each support independent baud rates and data formats, allowing simultaneous 1200 baud async telemetry from one channel and 19200 baud polled from another, with the four DMA channels enabling continuous background polling without burdening the RTU CPU. Its -40 C to +100 C operating temperature range is well-matched to outdoor cabinet and substation environments.
מומלץ
Factory-Floor Serial-Backplane Node
Factory-floor serial backplanes often carry multi-drop HDLC traffic between PLC racks at synchronous rates up to 500 kbaud. The Z84C4310AEG's HDLC/SDLC support with on-chip CRC generation and flag-detection reduces host CPU overhead compared to bit-banged synchronous protocols, and its dedicated channel-B modem signals enable handshake-based arbitration between multiple nodes on the same multi-drop trunk. The 44-LQFP surface-mount package suits automated pick-and-place assembly for high-volume PLC production lines.
מומלץ
Legacy M2M / Kiosk Controller Upgrades
M2M and kiosk controllers built around the Z80 ecosystem persist in vending, ticket vending, ATM, and parking systems, and the Z84C4310AEG provides a modern CMOS drop-in upgrade path while preserving the Z80 firmware base. Its 10 MHz timing closes the gap on higher-baud uplink telemetry, its on-chip DMA moves bulk data transfers off the host CPU, and the 44-LQFP package fits standard kiosk controller board layouts originally laid out for legacy NMOS Z84C40 parts.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור Z84C4310AEG — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | Z84C4310PEG | Z84C4310PEC |
|---|---|---|---|
| Package | 44-LQFP | 44-PLCC | 44-PDIP |
| Brand | Zilog | Zilog | Zilog |
| Maximum Clock | 10 MHz | 10 MHz | 10 MHz |
| Serial Channels | 2 full-duplex | 2 full-duplex | 2 full-duplex |
| DMA Channels | 4 | 4 | 4 |
| Supply Voltage | 5 V | 5 V | 5 V |
| Operating Temperature | -40 C to +100 C | -40 C to +100 C | -40 C to +100 C |
| Bus Interface | Z80 8-bit | Z80 8-bit | Z80 8-bit |
מבדילים עיקריים
- Lowest active current among Z80 SIO family variants (לעומתLegacy Z8440 NMOS Z80 SIO)
- On-chip DMA channels eliminate host-CPU byte interrupts (לעומתZ84C30 CTC (timer-only peripheral))
- Two independent full-duplex channels in one 44-LQFP package (לעומתSingle-channel Z84C42 UART)
הערות תכנון
The Z84C4310AEG requires a clean 5 V rail. Place a 100 nF ceramic decoupling capacitor as close as possible to VCC (pin 12) and a bulk 10 uF tantalum or aluminum polymer capacitor on the same plane. Spikes above 7 V or sustained ripple above 100 mV can cause register corruption and spurious interrupts on the open-drain INT line. Estimated: total current at 10 MHz is approximately 10 mA, so a 100 mA LDO (e.g., TPS7A2450DBVR, also in XAIPART) is sufficient headroom.
The 44-LQFP package requires a thermal pad connected to ground plane for heatsinking; route all eight power and ground pins to internal planes with via-stitching on 2 mm pitch. Keep clock (pin 13) and reset (pin 15) traces short and away from the data bus (pins 39 to 44 of the LQFP) to avoid coupling. The Z80 bus timing is intolerant of skew, so match trace lengths for D0 to D7 and the strobe lines (RD, WR, IORQ) within 5 mm.
Do not leave the IEI pin floating in daisy-chained interrupt topologies — always tie IEI of the highest-priority device to VCC through a 10 kohm pull-up. Failing this, the part may report no interrupts even when channel status registers indicate active RX/TX events. Also: the B_TX/RX clock pins (RTxCB, RTxCA) must be configured as inputs or outputs in software BEFORE enabling the channel; a misconfigured clock direction is a common cause of 'silent' first-channel operation.
When driving long cables (RS-232/V.24 at lengths exceeding 5 m), series-terminate the channel transmit data output with 47 ohm at the SIO pin to dampen reflections, especially at synchronous rates above 19200 baud. The receive data input should be AC-coupled through 100 pF when the cable impedance is 100 ohm or higher; otherwise DC-coupling with proper common-mode design suffices. Estimated: cable capacitance of 50 pF/m at 19200 baud implies a round-trip of ~250 ns which is within the Z80 SIO/3 jitter tolerance.
מידע על תאימות
RoHS, REACH, lead-free, halogen-free, and conflict-mineral declarations are not explicitly stated in the snippet-level verified data; the -40 C to +100 C temperature range indicates industrial (not full military) qualification. AEC-Q100 explicitly not applicable for this interface IC. Verify the compliance certificate directly with the Zilog sales channel for current production lots.
