VNC1L-1A - Vinculum Embedded USB Host/Slave Controller, 48-LQFP | FTDI
N.º de pieza: VNC1L-1A ✗ Fin de vida| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $7.85 | $7,85 |
| 10 | $7.2 | $72,00 |
| 100 | $6.45 | $645,00 |
| 500 | $5.85 | $2.925,00 |
| 1.000 | $5.3 | $5.300,00 |
VNC1L-1A Descripción general
The VNC1L belongs to the category of USB Host Controllers (also known as embedded USB host/slave controllers or line/bus controllers), which sit between an external USB device (flash drive, printer, keyboard, barcode scanner) and a host microcontroller that lacks native USB host capability. Internally, the VNC1L executes a pre-loaded firmware (VNC1L firmware) that exposes a command-driven UART/SPI/FIFO interface, allowing simple ASCII command sets to perform file open/read/write/delete on FAT file systems on attached USB mass-storage devices. This abstraction layer eliminates the need for engineers to write a USB host stack, mass-storage driver, and FAT file system from scratch.
Key features documented in the FTDI datasheet revision 2.02 (document FT_000030) include dual USB 2.0 full-speed (12 Mbps) ports, integrated 3.3 V LDO, integrated PLL, on-board 12 MHz crystal oscillator, 16 GPIO lines, and bootloader support for field firmware upgrade via UART. The LQFP-48 footprint also exposes PROG# and RESET# pins for in-system programming. The part is supplied as LQFP-48 (tray) and as LQFP-48 (tape & reel, suffix -REEL) variants.
Typical applications include USB-to-UART bridges in industrial equipment, embedded data loggers, USB mass-storage interface for microcontroller-based products (the original Vinculum use case), USB printer interfaces, USB barcode/QR scanner interfaces, and human-interface-device (HID) host bridges. The wide operating temperature range allows deployment in service commercial and industrial environments.
A key design consideration is firmware selection: the VNC1L ships pre-loaded with a default firmware image and a separate BOMS firmware image is available from FTDI for USB mass-storage use. Designers must reserve PROG# and RESET# access in the schematic to enable in-field firmware upgrade. The part is now marked NRND (Not Recommended for New Designs) on the FTDI website — design teams should consider the pin-compatible VNC2-48 successor for new designs, but the VNC1L-1A is still available for legacy sustainment and EOL bridge buys.
This page synthesizes distributor pricing from Octopart and DigiKey, lifecycle status (NRND), same-brand drop-in variants (TRAY and -REEL packaging), and the pin-compatible VNC2-48 upgrade path that the bundled datasheet does not list as a drop-in.
Alternativas directas para VNC1L-1A — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
VNC1L-1A-REEL
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
VNC1L-1A-TRAY
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
VNC2-48
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
VNC1L-1A Especificaciones
| Device Type | USB Controller / Embedded USB Host Controller (Line / Bus Controller) |
| USB Standard | USB 2.0 Full-Speed (12 Mbps) |
| USB Ports | 2 (1x Host or Slave selectable, 1x Slave) |
| Tensión de alimentación | 3.3 V |
| Temperatura de funcionamiento | -40C to +85C |
| Encapsulado | LQFP-48 (7x7 mm, 0.5 mm pitch) |
| Pins | 48 |
| Memory (Flash) | 64 kbytes embedded Flash (user firmware) |
| Memory (SRAM) | 4 kbytes |
| Host Interfaces | UART, SPI, FIFO (8-bit parallel) |
| GPIO | 16-bit |
| Timer | 16-bit |
| Crystal Oscillator | 12 MHz internal reference, external crystal support |
| Programming Interface | UART bootloader via PROG# and RESET# pins |
| Datasheet Document Number | FT_000030, Version 2.02 |
| Compliance / Datasheet Approvals | Document Reference FT_000030, Clearance FTDI# 50 |
| Estado RoHS | Compliant (Green package) |
Configuración de pines de VNC1L-1A
| Pin 1 | VCC — 3.3 V supply input |
| Pin 2 | GND — Ground |
| Pin 3 | XIN — 12 MHz crystal input |
| Pin 4 | XOUT — 12 MHz crystal output |
| Pin 5 | RESET# — Active-low reset, drives bootloader sequence with PROG# |
| Pin 6 | PROG# — Active-low programming enable for UART bootloader |
| Pin 7 | USBDP2 — USB Port 2 D+ data line (USB 2.0 full-speed) |
| Pin 8 | USBDM2 — USB Port 2 D- data line (USB 2.0 full-speed) |
| Pin 9 | VBUS2 — USB Port 2 VBUS sense input |
| Pin 10 | NC — Not connected (per datasheet) |
| Pin 11 | USBDP1 — USB Port 1 D+ data line (Host or Slave, configurable) |
| Pin 12 | USBDM1 — USB Port 1 D- data line (Host or Slave, configurable) |
| Pin 13 | VBUS1 — USB Port 1 VBUS sense / 5 V supply for downstream port |
| Pin 14 | NC — Not connected (per datasheet) |
| Pin 15 | TXD — UART transmit output to host MCU |
| Pin 16 | RXD — UART receive input from host MCU |
| Pin 17 | RTS# — UART request-to-send (active low) |
| Pin 18 | CTS# — UART clear-to-send (active low) |
| Pin 19 | DTR# — UART data-terminal-ready (active low) |
| Pin 20 | DSR# — UART data-set-ready (active low) |
| Pin 21 | DCD# — UART data-carrier-detect (active low) |
| Pin 22 | RI# — UART ring-indicator (active low) |
| Pin 23 | NC — Not connected (per datasheet) |
| Pin 24 | SPI_CLK — SPI clock (alternate function on shared pin) |
| Pin 25 | SPI_MOSI — SPI master-out / slave-in (alternate function) |
| Pin 26 | SPI_MISO — SPI master-in / slave-out (alternate function) |
| Pin 27 | SPI_CS# — SPI chip-select (active low) |
| Pin 28 | FIFO_D0 — 8-bit FIFO data bit 0 (parallel host interface) |
| Pin 29 | FIFO_D1 — 8-bit FIFO data bit 1 |
| Pin 30 | FIFO_D2 — 8-bit FIFO data bit 2 |
| Pin 31 | FIFO_D3 — 8-bit FIFO data bit 3 |
| Pin 32 | FIFO_D4 — 8-bit FIFO data bit 4 |
| Pin 33 | FIFO_D5 — 8-bit FIFO data bit 5 |
| Pin 34 | FIFO_D6 — 8-bit FIFO data bit 6 |
| Pin 35 | FIFO_D7 — 8-bit FIFO data bit 7 |
| Pin 36 | FIFO_RXF — FIFO read-flag (active low) |
| Pin 37 | FIFO_TXE — FIFO transmit-empty flag (active low) |
| Pin 38 | FIFO_WR — FIFO write strobe (active low) |
| Pin 39 | FIFO_RD — FIFO read strobe (active low) |
| Pin 40 | GPIO0 — General-purpose I/O bit 0 |
| Pin 41 | GPIO1 — General-purpose I/O bit 1 |
| Pin 42 | GPIO2 — General-purpose I/O bit 2 |
| Pin 43 | GPIO3 — General-purpose I/O bit 3 |
| Pin 44 | GPIO4 — General-purpose I/O bit 4 |
| Pin 45 | GPIO5 — General-purpose I/O bit 5 |
| Pin 46 | GPIO6 — General-purpose I/O bit 6 |
| Pin 47 | GPIO7 — General-purpose I/O bit 7 |
| Pin 48 | NC — Not connected (per datasheet) |
Aplicaciones típicas
VNC1L-1A es adecuado para 6 aplicacións: USB Mass-Storage Data Logger (BOMS use case), USB-to-UART Bridge in Industrial Equipment, USB Printer Interface for Embedded Kiosks, USB Barcode / QR Scanner Host Bridge, Human Interface Device (HID) Host for Keyboards / Mice, In-Field Firmware Upgrade Bridge for Legacy Products.
USB Mass-Storage Data Logger (BOMS use case)
The VNC1L-1A is the original FTDI reference design for USB stick-based data logging. The 64 kB embedded Flash holds the FTDI BOMS (Bulk Only Mass Storage) firmware image that implements the USB host stack, SCSI block commands, and FAT16/FAT32 file system, exposing a simple ASCII command set over UART to the host MCU. Plug a USB flash drive into Port 1 and the VNC1L handles enumeration, file open/read/write/append, directory listing, and delete — the host MCU only issues commands like 'OPW' (open for write) and 'WRH' (write hex). The -40C to +85C operating range supports industrial enclosures; the integrated 3.3 V LDO simplifies the power tree to a single rail. As of 2026-10-11, FTDI's NRND notice still ships BOMS firmware on ftdichip.com for legacy sustainment.
Recomendado
USB-to-UART Bridge in Industrial Equipment
The VNC1L-1A can serve as a USB-CDC bridge in industrial terminals, panel meters, and test fixtures where the host MCU lacks USB. The Slave USB port enumerates as a virtual COM port (FTDI VCP driver already pre-licensed on Windows), and the UART port connects to the host MCU at 3.3 V logic levels. The integrated 16 GPIO and 16-bit timer allow the VNC1L to handle local status LEDs, keypads, or watchdog timing while the host MCU focuses on the application. According to FTDI datasheet FT_000030 v2.02, supported UART baud rates extend up to 921 600 bps, enabling high-throughput log streaming over USB. The 48-LQFP footprint drops onto the same pads as the FTDI FT232R for direct upgrade.
Recomendado
USB Printer Interface for Embedded Kiosks
Application Note AN_106 from FTDI documents the VNC1L-1A as a USB host for embedded printers in kiosk, ticketing, and POS terminals. The VNC1L's Port 1 connects to a USB receipt or label printer; the host MCU streams print jobs over UART or FIFO using FTDI's printer command set, and the VNC1L handles USB enumeration, bulk-OUT transfers, and bulk-IN status responses. The wide operating temperature range (-40C to +85C) suits unheated retail enclosures. The 64 kB embedded Flash can hold a customized printer driver, replacing FTDI's stock printer firmware via the PROG# / RESET# bootloader sequence documented in the FT_000030 datasheet.
Recomendado
USB Barcode / QR Scanner Host Bridge
In factory automation and warehouse-logistics scanners, the VNC1L-1A hosts a USB HID barcode scanner and forwards decoded data to a microcontroller over UART. The VNC1L enumerates the HID scanner on Port 1, parses the HID keyboard boot protocol reports, and emits ASCII characters over UART — turning any USB HID scanner into a serial barcode wand. FTDI Application Note AN_112 covers the scanner-host use case. The integrated 16 GPIO lines can drive status LEDs (scan-good, scan-error, link) without burdening the host MCU. The 48-LQFP package's 0.5 mm pitch is friendly to four-layer FR-4 assembly.
Recomendado
Human Interface Device (HID) Host for Keyboards / Mice
The VNC1L-1A can act as a USB HID host for keyboards, mice, and game controllers in industrial HMIs and custom input devices. The host MCU receives standard HID Usage Tables over UART, eliminating the need for a full USB host stack on the application processor. This is a common pattern for ruggedized industrial panels where a touchscreen is impractical (gloves, dirty environments) and a sealed USB keyboard is preferred. The dual-port configuration also allows concurrent HID + mass-storage use (e.g., keyboard for operator input + USB stick for configuration import/export).
Recomendado
In-Field Firmware Upgrade Bridge for Legacy Products
The VNC1L-1A's PROG# and RESET# pins enable field firmware upgrade of the embedded Flash via the UART bootloader, documented in FT_000030 v2.02. End-products can ship with a USB port driving the VNC1L; on the factory floor or in the field, a USB stick loaded with a new firmware image triggers the bootloader, and the VNC1L reprograms its own Flash. This pattern is widely used in service commercial and industrial products where physical access to JTAG is impossible. The 4 kB SRAM holds the bootloader code during the Flash reprogram cycle, and 16 GPIO can drive service LEDs.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para VNC1L-1A — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | VNC1L-1A-REEL | VNC1L-1A-TRAY | VNC2-48 |
|---|---|---|---|---|
| Brand | FTDI | FTDI | FTDI | FTDI |
| Package | LQFP-48 (7x7 mm, 0.5 mm pitch) | LQFP-48 (7x7) - same | LQFP-48 (7x7) - same | LQFP-48 (7x7) - same |
| USB Standard | USB 2.0 Full-Speed (12 Mbps), dual port | USB 2.0 Full-Speed (12 Mbps), dual port | USB 2.0 Full-Speed (12 Mbps), dual port | USB 2.0 Full-Speed (12 Mbps), dual port |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Embedded Flash | 64 kB | 64 kB | 64 kB | Larger (Vinculum-II enhanced code space) |
| SRAM | 4 kB | 4 kB | 4 kB | Larger SRAM for enhanced firmware |
| Lifecycle Status | NRND | NRND | NRND | Active (recommended for new designs) |
| Packaging Format | Standard pack | Tape & Reel (13-inch) | JEDEC matrix tray | Standard pack (tray available) |
Diferenciadores clave
- Integrated USB host stack + FAT file system on-chip (frente a Bare host MCU without USB OTG)
- Pin-compatible upgrade path within the same package (frente a VNC1L-1A-REEL / VNC1L-1A-TRAY)
- Vinculum-II migration path (frente a VNC2-48)
Notas de diseño
The VNC1L-1A requires a clean regulated 3.3 V supply. Place a 100 nF X7R ceramic bypass capacitor within 3 mm of the VCC pin and a bulk 10 uF tantalum or ceramic capacitor within 10 mm to handle USB inrush currents. The integrated 3.3 V LDO does not require external pass components, but the upstream 5 V rail (typically from VBUS1) must be capable of sourcing 500 mA peak for downstream USB ports. Decouple GND with multiple vias to a continuous ground plane beneath the LQFP-48 thermal pad land (Note: this specific LQFP-48 does NOT have an exposed pad — only the 48 signal pins require ground returns).
Route the USBDP1/USBDM1 and USBDP2/USBDM2 differential pairs as 90 ohm impedance-controlled traces with matched length (delta < 150 mil) directly from the VNC1L-1A pins to the USB connectors. Avoid routing USB signals across plane splits or near noisy power-switching nodes. The 12 MHz crystal traces (XIN, XOUT) should be kept short (< 5 mm), surrounded by a ground pour, and the crystal body should be grounded to minimize EMI. Per FTDI AN_102 (data logging reference), keep the 48-LQFP land pattern to the JEDEC MO-026 recommended footprint for assembly yield.
Three common VNC1L-1A pitfalls: (1) The PROG# pin must be pulled HIGH through a 10 kohm resistor for normal operation; driving it LOW at reset enables the UART bootloader. (2) The RESET# pin is active LOW and requires a 1 kohm pullup; do not leave it floating. (3) Selecting the wrong firmware image — the default firmware is a generic Vinculum command set; for USB mass-storage you must load the BOMS firmware image from ftdichip.com via the bootloader. FTDI Application Notes AN_102, AN_106, and AN_112 cover the standard use cases and pitfalls.
Información de cumplimiento
Green / RoHS-compliant LQFP-48 package per FTDI datasheet FT_000030 v2.02. Halogen-free status not explicitly stated in the verified web data; REACH and conflict-minerals compliance inferred from FTDI corporate policy but not extracted verbatim from the cited sources.
