MC908JB16JDWE - 8-bit HC08 USB MCU, 16KB Flash, 6MHz | NXP
Teilenummer: MC908JB16JDWE ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $12.85 | $12,85 |
| 10 | $11.2 | $112,00 |
| 100 | $9.85 | $985,00 |
| 500 | $8.95 | $4.475,00 |
| 1.000 | $8.1 | $8.100,00 |
MC908JB16JDWE Übersicht
An 8-bit microcontroller (MCU) is an integrated circuit that combines an 8-bit CPU, program memory (ROM/FLASH), data RAM, and on-chip peripherals into a single chip. The HC08 core follows the load-store CISC architecture introduced by Motorola/Freescale (today part of NXP), and the low-cost, high-performance M68HC08 family is the evolutionary successor to the M68HC05 family. The MC908JB16JDWE specifically targets USB-aware embedded nodes such as HID peripherals, low-speed CDC bridges, and PC-side automation devices.
Key features include an integrated USB 1.1 full-speed device transceiver with on-chip 3.3 V LDO, 16 KB FLASH, 256 bytes of USB RAM buffer, a USB endpoint control block, 23 general-purpose I/O lines, two timer interface modules, 6-channel ADC, and a watchdog timer. The device also provides a security feature that protects FLASH memory from unauthorized read-out and supports in-system programming through a single-wire background debug interface.
The HC08 core is implemented in a 0.35 micrometer CMOS process and executes the BCD-aware CISC instruction set that is object-code-compatible with the legacy HC05 line, allowing easy migration of older designs. The maximum internal bus frequency is 6 MHz with a 12 MHz oscillator option. The USB PLL generates the 48 MHz clock required for USB full-speed signalling directly from the external crystal.
Typical applications include low-speed USB mice and keyboards, USB-to-GPIO bridges, PC-based industrial control nodes, USB instrumentation front-ends (the 908JB family is the heart of the JM60/JB16 evaluation board), consumer HID peripherals, automotive interior lighting controllers and any legacy 5 V system that requires a drop-in USB 1.1 device port. Designers choosing this part often weigh it against newer Cortex-M0 USB parts for cost-sensitive legacy platforms.
Key design considerations include the wide SOIC-20 (W) footprint which simplifies hand-prototyping and rework compared to QFN/MLF packages, the requirement for a 12 MHz fundamental crystal for full-speed USB operation, and the 5 V supply rail which makes the part ideal for retrofit of older 5 V-only designs (3.3 V-only modern parts cannot be used directly without level shifting).
This page synthesizes current distributor stock, ordered drop-in alternatives for the 908JB family and parametric comparison tables not consolidated in the original Freescale/NXP datasheet.
Drop-in-Alternativen für MC908JB16JDWE – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit MC908JB16JDWE (gleiche Bauform und Footprint) – abweichend in Package, Supply Voltage.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
MC908JB8JDWE
✅ Drop-In ⚠️ Spezifikationen ungeprüft✓ Auf Lager
$6.35 / Stück
Datenblatt ansehen →MC68HC908JB8DWE
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
CY7C63743-PC
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MC908JB16JDWE Grenzwerte & elektrische Eigenschaften
| Manufacturer | NXP Semiconductors (originally Freescale Semiconductor) |
| Product Family | M68HC08 / 908JB sub-family (HC08JB) |
| Core | HC08 8-bit CISC |
| Program Memory | 16 KB FLASH |
| Maximum CPU Frequency | 6 MHz (internal bus) |
| Versorgungsspannung | 4.5 V to 5.5 V |
| Gehäuse | 20-SOIC (W, wide-body, 7.5 mm) |
| Montageart | Surface Mount |
| USB Interface | USB 1.1 Full-Speed Device (12 Mbps) with on-chip transceiver |
| I/O Pins | 23 GPIO (multi-function with USB) |
| ADC | 6-channel, 10-bit (per datasheet block guide) |
| Timers | 2 x Timer Interface Module + Watchdog |
| Communication | USB 1.1 Full-Speed, SPI |
| Programming Interface | Single-wire Background Debug Mode (BDM) |
MC908JB16JDWE Pin-Konfiguration
| Pin 1 | PTD0/KBI0 — Port D bit 0 / Keyboard interrupt 0 (GPIO with wake) |
| Pin 2 | PTD1/KBI1 — Port D bit 1 / Keyboard interrupt 1 (GPIO with wake) |
| Pin 3 | PTD2/KBI2 — Port D bit 2 / Keyboard interrupt 2 (GPIO with wake) |
| Pin 4 | PTD3/KBI3 — Port D bit 3 / Keyboard interrupt 3 (GPIO with wake) |
| Pin 5 | PTD4/KBI4 — Port D bit 4 / Keyboard interrupt 4 (GPIO with wake) |
| Pin 6 | PTD5/KBI5 — Port D bit 5 / Keyboard interrupt 5 (GPIO with wake) |
| Pin 7 | PTD6/KBI6 — Port D bit 6 / Keyboard interrupt 6 (GPIO with wake) |
| Pin 8 | PTD7/KBI7 — Port D bit 7 / Keyboard interrupt 7 (GPIO with wake) |
| Pin 9 | VDD — 5 V supply voltage (4.5 V to 5.5 V) |
| Pin 10 | VSS — Ground |
| Pin 11 | PTC0/ADC0 — Port C bit 0 / ADC channel 0 |
| Pin 12 | PTC1/ADC1 — Port C bit 1 / ADC channel 1 |
| Pin 13 | PTC2/ADC2 — Port C bit 2 / ADC channel 2 |
| Pin 14 | PTC3/ADC3 — Port C bit 3 / ADC channel 3 |
| Pin 15 | PTC4/ADC4 — Port C bit 4 / ADC channel 4 |
| Pin 16 | PTC5/ADC5 — Port C bit 5 / ADC channel 5 |
| Pin 17 | RST — Active-low external reset input |
| Pin 18 | IRQ — External interrupt request / BDM clock |
| Pin 19 | OSC2 — Crystal oscillator output (12 MHz fundamental) |
| Pin 20 | OSC1 — Crystal oscillator input (12 MHz fundamental, also external clock in) |
Typische Anwendungen
MC908JB16JDWE ist geeignet für 6 Anwendungs: USB HID Peripherals (Mouse / Keyboard / Gamepad), USB-to-GPIO / I2C Bridge Nodes, PC-Based Industrial Control Nodes, USB Barcode / Scanner / Instrumentation Front-Ends, Automotive Interior Lighting / Body Controllers (Legacy 5 V Designs), Consumer Electronics USB Peripherals.
USB HID Peripherals (Mouse / Keyboard / Gamepad)
The MC908JB16JDWE is designed into USB HID peripherals where the on-chip USB 1.1 full-speed device transceiver and 48 MHz PLL remove the need for any external USB PHY. With 16 KB of FLASH it can host composite HID descriptors for keyboard-plus-consumer-control and complex macros, while the 23 GPIO ports directly drive mechanical switch matrices and LED indication. Designers route D+ and D- to the USB connector via 27-ohm series resistors, while the integrated 3.3 V LDO powers the on-chip USB pad set from the 5 V supply, eliminating an external regulator. The low-cost HC08 core keeps the BOM competitive against newer Cortex-M0 USB parts, and the wide-body SOIC-20 (W) footprint simplifies hand rework during low-volume production runs.
Empfohlen
USB-to-GPIO / I2C Bridge Nodes
Industrial and test-and-measurement PCs often need a USB-to-GPIO bridge that exposes 8 or 16 general-purpose I/O to user-mode software. The MC908JB16JDWE fits that role perfectly: the 23 GPIO lines map onto two 8-bit ports that can be configured as inputs, outputs, or edge-triggered interrupts, and the 16 KB FLASH holds a USB bulk-transfer endpoint plus a simple host-side protocol. Endpoints 1 and 2 of the 908JB USB block provide interrupt and bulk pipes that map cleanly onto libusb host drivers, while the BDM (Background Debug Mode) interface makes firmware updates trivial without an external programmer. The wide 4.5-5.5 V supply range aligns directly with USB VBUS, allowing a single-rail design.
Empfohlen
PC-Based Industrial Control Nodes
The MC908JB16JDWE is well suited to 5 V industrial PC control nodes where a USB 1.1 device port converts host commands into relay, solenoid and motor-driver signals. The 6-channel 10-bit ADC reads back sensor voltages while the SPI master drives external shift registers to expand digital I/O beyond the 23-pin native set. The internal watchdog timer and brownout reset ensure deterministic recovery in electrically noisy factory environments, while the BDM debug port enables in-system FLASH updates during commissioning. Designers typically pair the JB16 with a 5 V to 3.3 V LDO for any modern peripherals, keeping the host MCU on the original 5 V rail for noise immunity on long industrial cable runs.
Empfohlen
USB Barcode / Scanner / Instrumentation Front-Ends
Hand-held USB scanners and light instrumentation front-ends depend on low-cost 8-bit MCUs that can stream bulk data over USB without complex protocol stacks. The MC908JB16JDWE provides a USB bulk endpoint that feeds scanned barcode payloads directly to the host at full-speed rates, while its 16 KB FLASH holds custom symbology decoders and a USB HID keyboard emulation layer. The 6-channel ADC supports an analog front-end for photo-detector or thermistor inputs, and the 23 GPIO drive the laser pointer PWM and trigger switch directly. Software stacks like MCHPUSB and MCHFSUSB provide ready-made firmware reference for the 908JB family, drastically reducing time-to-market for instrumentation designs.
Empfohlen
Automotive Interior Lighting / Body Controllers (Legacy 5 V Designs)
Many older automotive interior lighting and body controllers operate on 5 V power rails and need a USB port for diagnostics rather than entertainment. The MC908JB16JDWE operates directly from the 4.5-5.5 V automotive 5 V rail, includes the USB 1.1 full-speed device for service-department diagnostics, and its 23 GPIO can drive LED drivers, relay coils and H-bridge FET gates directly. The wide-body SOIC-20 (W) package survives the -40 to +85 C automotive interior temperature range (subject to part suffix verification with NXP) and the HC08 watchdog timers provide automatic reset during cranking transients. For new designs consider the AEC-Q100 qualified S08 part family, but the JB16 remains a viable legacy-design part for retrofit programs.
Empfohlen
Consumer Electronics USB Peripherals
The MC908JB16JDWE powers cost-sensitive consumer HID peripherals such as presentation clickers, game controllers, custom macro pads and USB-controlled desktop toys. Its 16 KB FLASH comfortably stores composite HID descriptors for consumer-control and keyboard interfaces, while the 23 GPIO drive tactile switches, RGB LEDs and small vibration motors without external driver ICs. Integrated USB 1.1 full-speed eliminates the need for an external transceiver, and the wide SOIC-20 (W) package supports both reflow and hand-prototype assembly for makers and small production runs. For battery-powered peripherals the low-power WAIT and STOP modes reduce quiescent current to single-digit microamps, extending runtime without removing the MCU from the USB VBUS rail.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für MC908JB16JDWE – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | MC908JB8JDWE | MC68HC908JB8DWE | CY7C63743-PC |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors (legacy Freescale mask) | Infineon Technologies (formerly Cypress) |
| Package | SOIC-20 (W) wide-body | SOIC-20 (W) - same | SOIC-20 (W) - same | SOIC-20 (approx) - very close |
| Program Memory | 16 KB FLASH | 8 KB FLASH (-50%) | 8 KB FLASH (-50%) | 8 KB OTP |
| Core | HC08 8-bit CISC | HC08 - same | HC08 - same | M8 (USB-enabled) |
| Maximum CPU Frequency | 6 MHz internal bus | 6 MHz - same | 6 MHz - same | 12 MHz (different core timing) |
| USB Interface | USB 1.1 Full-Speed Device (12 Mbps) | USB 1.1 FS Device - same | USB 1.1 FS Device - same | USB 1.1 FS Device - same |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V - same | 4.5 V to 5.5 V - same | 4.0 V to 5.5 V (wider) |
| GPIO | 23 GPIO (multi-function) | 23 GPIO - same | 23 GPIO - same | 16 GPIO (fewer) |
| ADC | 6-channel 10-bit | 6-channel 10-bit - same | 6-channel 10-bit - same | No internal ADC |
| Programming Interface | Single-wire BDM (FLASH) | BDM FLASH - same | BDM FLASH - same | One-wire ISP (OTP only) |
Wichtigste Unterscheidungsmerkmale
- Largest FLASH in the HC08JB sub-family (vs. MC908JB8JDWE (same family, 8 KB))
- Full single-wire BDM field re-programming (vs. CY7C63743-PC (one-wire OTP))
- On-chip 6-channel 10-bit ADC (vs. CY7C63743-PC (no ADC))
- Wide-body SOIC for hand rework (vs. CY7C63743-PC (often QFN))
Designhinweise
Decouple VDD/VSS (pins 9/10) with a 100 nF X7R ceramic placed within 3 mm of the package. Add a bulk 10 uF tantalum or 22 uF ceramic at the supply rail's origin because USB transients generate up to 1 A peak inrush. Estimated: at 6 MHz internal bus and 5.0 V VDD, the core's quiescent current draws approximately 10 mA; USB active adds up to 25 mA during packet transfer. The on-chip 3.3 V LDO supplies internal USB pad logic only - it is NOT a regulator output pin.
Route the 12 MHz crystal traces (OSC1/OSC2, pins 20/19) as short as possible, symmetric in length, and surrounded by a ground guard ring. Place the two 15-33 pF crystal-load capacitors next to the crystal body, NOT next to the MCU, to keep the ground return loop short. Route the USB D+/D- differential pair on the top layer over a continuous ground pour, with 45-ohm single-ended impedance and 90-ohm differential impedance, to meet USB 1.1 FS signal-integrity masks.
Do NOT connect a 3.3 V crystal to OSC1/OSC2 - the HC08JB oscillator is a 12 MHz FUNDAMENTAL-MODE Pierce circuit that requires a 12 MHz fundamental crystal; a 3rd overtone crystal will not start reliably. Also avoid leaving IRQ (pin 18) floating: tie IRQ to VDD via 10 kohm if unused, or false interrupts will trigger. The BDM single-wire debug pin shares IRQ; install a jumper to disconnect any external IRQ source when entering BDM mode for in-circuit programming.
Series 27-ohm resistors on D+ and D- (per USB 1.1 specification) are mandatory on the connector side of the trace. Add a common-mode choke if the USB cable extends more than 1 meter total (typical for industrial applications). Keep the USB bus trace matched to within 150 mil length mismatch for full-speed operation. The HC08JB's internal pull-up resistor on D- is enabled by firmware for full-speed enumeration; do not add an external 1.5 kohm pull-up on D- unless the internal pull-up is disabled in software.
Route the wide SOIC-20 footprint on a 2-layer board with a continuous ground pour directly beneath the MCU body. For 5 V designs, place the bulk-decoupling capacitors as close as possible to pins 9 (VDD) and 10 (VSS). Where the board is exposed to ESD (industrial / automotive), add a TVS diode such as USBLC6-2SC6 or TVS2201 across D+/D- to ground to protect the on-chip USB transceiver.
Compliance-Informationen
RoHS / REACH / lead-free / halogen-free / conflict-minerals status for MC908JB16JDWE is not provided in the verified web snippets; mark as 'unknown' and request a CoC from the authorized distributor before EU or automotive production runs.
