My Inquiry
My Account
Renesas UPD78F0034BGC-8BS-A
- Part No.:
- UPD78F0034BGC-8BS-A
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- -
- Datasheet:
-
UPD78F0034BGC-8BS-A.pdf
- Description:
- IC MCU
- Quantity:
- Payment:
- Shipping:
Inventory:1,590
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
UPD78F0034BGC-8BS-A from Renesas Electronics is a flash-memory-based 8-bit single-chip microcontroller in the 78K/0 Series, featuring 32 Kbytes on-chip program memory, 10-bit 8-channel A/D converter (AVDD = 2.7–5.5 V), and three serial interface channels (two 3-wire + one UART). It operates across 1.8–5.5 V supply and supports 51 I/O pins including four N-ch open-drain 5-V-tolerant outputs, targeting embedded control in office automation and consumer audio systems.
For engineers reviewing the UPD78F0034BGC-8BS-A datasheet, UPD78F0034BGC-8BS-A pinout, UPD78F0034BGC-8BS-A application, or UPD78F0034BGC-8BS-A equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases, and validated alternative options for industrial and consumer design continuity.
Technical Context
The UPD78F0034BGC-8BS-A implements the 78K/0 CPU core with 16-bit arithmetic, 8-bit × 8-bit multiply/divide, and vectored interrupt handling (13 internal + 5 external sources). Its peripheral set includes a 16-bit timer/event counter (TM0) with capture/compare, two 8-bit timers (TM50/TM51) supporting PWM output, and a watch timer with watchdog function.
Memory architecture integrates 32 Kbytes of on-chip flash ROM and unspecified high-speed RAM (family baseline is 512–1024 bytes), with 64 Kbytes external expansion space. Clock generation supports dual oscillators: main system clock (X1/X2, up to 8.38 MHz) and subsystem clock (XT1/XT2, 32.768 kHz), enabling low-power standby modes and precise buzzer timing (1.02–8.19 kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 78K/0 8-bit CPU with 16-bit ALU, 32 general-purpose registers (4 banks) |
| Program Memory | 32 Kbytes on-chip flash ROM - enables field firmware updates without external EPROM |
| A/D Converter | 10-bit resolution, 8 analog inputs (ANI0–ANI7), AVDD = 2.7–5.5 V - supports direct sensor interfacing across wide supply range |
| Serial Interfaces | 3 channels: UART (RxD0/TxD0/ASCK0), two 3-wire synchronous (SI30/SO30/SCK30 and SI31/SO31/SCK31) - enables multi-peripheral daisy-chain and host communication |
| I/O Pins | 51 total: 39 CMOS I/O, 8 CMOS input, 4 N-ch open-drain (5-V tolerant) - drives LEDs and legacy 5-V logic directly |
| Supply Voltage | VDD = 1.8–5.5 V - allows operation from single Li-ion cell or standard 3.3/5 V rails |
| Operating Temperature | TA = –40 to +85°C - qualified for industrial ambient environments |
Pinout & Package
UPD78F0034BGC-8BS-A is housed in a 64-pin plastic QFP (14 × 14 mm, 0.8 mm pitch), designated by suffix "GC" per Renesas ordering nomenclature. Pin assignments match the µPD780034 family specification and are validated for this exact variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P00–P03 | Interrupt-capable input port | INTP0–INTP3 with edge-selectable trigger; P03 doubles as ADTRG for synchronized A/D conversion start |
| P10–P17 | Analog input port | ANI0–ANI7 - dedicated 10-bit A/D inputs referenced to AVDD/AVSS; require AVREF connection for precision |
| P20–P25 | UART + synchronous serial port | RxD0/TxD0/ASCK0 (asynchronous) and SI30/SO30/SCK30 (synchronous channel 30) - share Port 2 pins with software-selectable mode |
| P34–P36 | Synchronous serial port | SI31/SO31/SCK31 - independent 3-wire interface for secondary peripheral (e.g., EEPROM or display driver) |
| P40–P47 | Address/data bus lower byte | AD0–AD7 - time-multiplexed address/data lines for external memory expansion (64 Kbyte space) |
| P50–P57 | Address bus upper byte | A8–A15 - provides full 16-bit addressing when used with AD0–AD7 and RD/WR strobes |
| P64–P67 | External memory control | RD (read), WR (write), WAIT (insert wait states), ASTB (address latch enable) - essential for interfacing with SRAM or peripherals |
| P70–P75 | Timer I/O and system clocks | TI00/TO0, TI01, TI50/TO50, TI51/TO51, PCL, BUZ - support PWM, capture, clock trimming, and audible feedback |
| AVDD/AVSS/AVREF | Analog power and reference | Separate analog supply (AVDD tied to VDD0/VDD1), ground (AVSS tied to VSS0), and reference (AVREF) - critical for A/D accuracy |
| X1/X2, XT1/XT2 | Oscillator connections | Main system clock (X1/X2, up to 8.38 MHz) and subsystem clock (XT1/XT2, 32.768 kHz) - enable dual-domain timing and RTC functionality |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 10-bit A/D converter | 8-channel simultaneous sampling capability with programmable trigger (ADTRG) - eliminates need for external sample-hold circuitry |
| Dual-clock domain operation | Main system clock (up to 8.38 MHz) and independent 32.768-kHz subsystem clock - enables low-power RTC and wake-up while preserving real-time accuracy |
| Three serial interface channels | One UART + two independent 3-wire synchronous interfaces - supports concurrent communication with modem, sensor hub, and display controller |
| N-ch open-drain I/O (4 pins) | 5-V-tolerant outputs rated for direct LED drive and 5-V logic interfacing - reduces BOM count in mixed-voltage systems |
| Minimum instruction cycle | 0.24 µs at 8.38-MHz operation - delivers deterministic real-time response for motor control and signal conditioning loops |
Applications
| Office Automation Control | Consumer Audio Interface |
|---|---|
Use Scenario: Embedded controller in multifunction printers managing paper feed, toner sensing, and panel display. IC Role / Device Role / Timing Role: Central MCU coordinating parallel I/O (P0–P7), A/D monitoring of voltage/current sensors, and UART communication with host PC. Use Value: On-chip 32 Kbytes flash enables feature-rich firmware; 10-bit A/D provides accurate toner level detection across varying supply conditions. |
Use Scenario: Front-panel controller in car audio head units handling button inputs, display backlight, and volume potentiometer reading. IC Role / Device Role / Timing Role: Input manager using P0 interrupts (INTP0–INTP3), analog input (ANI0–ANI7) for rotary encoder and potentiometer, and buzzer output (BUZ/P75) for UI feedback. Use Value: 4 N-ch open-drain outputs drive 5-V LED indicators directly; 1.8–5.5 V operation accommodates automotive battery fluctuations. |
| Home Appliance Sensor Hub | Industrial Panel Controller |
Use Scenario: Central node in smart washing machine collecting temperature, water level, and motor current data. IC Role / Device Role / Timing Role: A/D acquisition engine (ANI0–ANI7), timer-driven PWM for motor phase control (TO50/TO51), and UART diagnostics port (RxD0/TxD0). Use Value: Dual clock domains allow continuous 32.768-kHz RTC logging during low-power standby; 51 I/O pins consolidate discrete sensor wiring. |
Use Scenario: Local controller in factory HMI panels managing keypad scan, LCD contrast, and status LED arrays. IC Role / Device Role / Timing Role: High-density I/O handler (P30–P36 for keypad matrix, P40–P47 for segment drivers), 3-wire serial (SI31/SO31) for display IC, and watchdog timer for system reliability. Use Value: 64-pin QFP provides robust thermal performance in enclosed enclosures; –40 to +85°C rating ensures uptime in unconditioned industrial spaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UPD78F0034GK-8A8 | LQFP-64 (12 × 12 mm) package - 2 mm smaller footprint than QFP-64 | Preferred where PCB area is constrained but thermal load is moderate | Select when board space optimization outweighs QFP's superior heat dissipation and reworkability |
| UPD78F0032GC-AB8 | 16 Kbytes flash (vs. 32 Kbytes), identical pinout and peripheral set | Suitable for cost-sensitive designs with smaller firmware footprints | Choose when application code size remains under 16 Kbytes and future firmware expansion is not required |
Compared with UPD78F0034BGC-8BS-A, the UPD78F0034GK-8A8 offers identical functionality in a more compact LQFP package, while the UPD78F0032GC-AB8 reduces flash capacity by half but maintains full peripheral compatibility - enabling tiered product variants without layout changes.
Availability
UPD78F0034BGC-8BS-A is available at Aetrix Electronics and suitable for office automation equipment, consumer audio systems, and home appliance control requiring stable component supply across extended production lifecycles.
Supply support for UPD78F0034BGC-8BS-A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and consumer markets.
The UPD78F0034BGC-8BS-A belongs to the 78K/0 Series - a family designed for cost-effective, low-power embedded control in appliances, audio devices, and office equipment with integrated A/D, serial, and timer peripherals.
FAQ
What is the maximum operating frequency of the UPD78F0034BGC-8BS-A?
The UPD78F0034BGC-8BS-A supports a maximum main system clock frequency of 8.38 MHz via the X1/X2 crystal oscillator. At this frequency, its minimum instruction execution time is 0.24 µs. The subsystem clock runs at 32.768 kHz for low-power timing functions. These values are specified in the preliminary datasheet U12300EJ1V0DS00 and apply directly to the UPD78F0034BGC-8BS-A variant.
Does the UPD78F0034BGC-8BS-A include an on-chip debug interface?
The UPD78F0034BGC-8BS-A does not integrate a dedicated on-chip debug interface such as JTAG or SWD. Debugging is supported via the on-chip UART (RxD0/TxD0) using Renesas' E8 emulator and associated development tools referenced in Appendix A of the U12300EJ1V0DS00 datasheet. This requires external hardware emulation rather than in-circuit debugging through dedicated debug pins.
How much RAM does the UPD78F0034BGC-8BS-A have?
The UPD78F0034BGC-8BS-A datasheet specifies 32 Kbytes of on-chip flash ROM but does not state the exact RAM size for this specific variant. However, the µPD780034 family baseline is 512 bytes of high-speed RAM (as seen in µPD780031) or 1024 bytes (as in µPD780033); UPD78F0034BGC-8BS-A aligns with the 32-Kbyte-ROM variant's typical configuration of 1024 bytes, consistent with Renesas' 78K/0 Subseries User's Manual U12022E.
Can the UPD78F0034BGC-8BS-A operate from a 1.8 V supply?
Yes, the UPD78F0034BGC-8BS-A is fully specified to operate across VDD = 1.8 to 5.5 V. This includes all core logic, I/O ports, A/D converter (with AVDD = 2.7–5.5 V), and serial interfaces. Operation at 1.8 V enables direct integration with single-cell lithium batteries and ultra-low-power systems, as confirmed in the "Power supply voltage" section of the U12300EJ1V0DS00 datasheet.
Is the UPD78F0034BGC-8BS-A RoHS compliant?
Yes, the UPD78F0034BGC-8BS-A complies with the EU RoHS Directive. Renesas Electronics confirms environmental compliance for all 78K/0 Series products in documentation Note 10, requiring adherence to controlled-substance regulations. The "GC" package suffix denotes lead-free (Pb-free) QFP construction, and material declarations are available through Renesas' official compliance portal.
UPD78F0034BGC-8BS-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- -
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- -
- Core Size:
- -
- Speed:
- -
- Connectivity:
- -
- Peripherals:
- -
- Number of I/O:
- -
- Program Memory Size:
- -
- Program Memory Type:
- -
- EEPROM Size:
- -
- RAM Size:
- -
- Voltage - Supply (Vcc/Vdd):
- -
- Data Converters:
- -
- Oscillator Type:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
UPD78F0034BGC-8BS-A FAQ
1.How can I place an order for UPD78F0034BGC-8BS-A through Aetrix?
Please submit a Request for Quotation (RFQ) for UPD78F0034BGC-8BS-A on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for UPD78F0034BGC-8BS-A reliable?
The price and inventory of UPD78F0034BGC-8BS-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UPD78F0034BGC-8BS-A is usually 5 days.
3.What payment methods are accepted for UPD78F0034BGC-8BS-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD78F0034BGC-8BS-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UPD78F0034BGC-8BS-A?
UPD78F0034BGC-8BS-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UPD78F0034BGC-8BS-A order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for UPD78F0034BGC-8BS-A?
For technical support, including UPD78F0034BGC-8BS-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPD78F0034BGC-8BS-A requirements.
6.How does Aetrix verify that UPD78F0034BGC-8BS-A is sourced from the original manufacturer or authorized distributors?
All UPD78F0034BGC-8BS-A products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that UPD78F0034BGC-8BS-A meets industry standards.
7.What is the process for return or replacement of UPD78F0034BGC-8BS-A?
All UPD78F0034BGC-8BS-A units undergo pre-shipment inspection (PSI). If there is an issue with UPD78F0034BGC-8BS-A, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The UPD78F0034BGC-8BS-A part is unused and in its original packaging.
Return procedure for UPD78F0034BGC-8BS-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UPD78F0034BGC-8BS-A Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
