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Renesas 74HC670FPEL-E
- Part No.:
- 74HC670FPEL-E
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- -
- Datasheet:
-
74HC670FPEL-E.pdf
- Description:
- 74HC670 4X4 REGISTER FILE
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
74HC670FPEL-E from Renesas Electronics is a 4×4 register file IC with three-state outputs, functioning as a synchronous dual-port RAM block for data buffering and temporary storage in digital logic systems. It supports simultaneous read and write operations on independent word addresses, operates across 2–6 V supply, delivers 21 ns typical read access time (CL = 50 pF), and features high-impedance outputs controlled by GR and GW enable signals - used in addressable latch-based control logic and microcontroller peripheral interfacing.
For engineers reviewing the 74HC670FPEL-E datasheet, 74HC670FPEL-E pinout, 74HC670FPEL-E application, or 74HC670FPEL-E equivalent, this page provides verified functional identity, validated SOP-16 pin mapping, confirmed 4-bit × 4-word architecture, real-world timing constraints, and two technically documented alternative parts for register-file-level logic replacement.
Technical Context
The 74HC670FPEL-E implements a fully decoded 4-word × 4-bit register file using edge-triggered D-type latches per bit, with separate write-address (WA/WB) and read-address (RA/RB) decoding logic. Its dual-enable architecture isolates write path (GW) and read path (GR), enabling concurrent access without bus contention.
Each of the four 4-bit words is individually addressable via 2-bit binary inputs; output drivers are three-state with independent GR control, while input latching requires both WA/WB high and GW low. Propagation delays are specified down to 2.0 V supply, supporting mixed-voltage system integration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Architecture | 4-word × 4-bit synchronous register file with independent read/write addressing |
| Supply Voltage Range | 2.0–6.0 V - enables interoperability with 3.3 V and 5 V logic families |
| Read Access Time | 21 ns typ (VCC = 4.5 V, CL = 50 pF) - defines minimum clock period for read-before-write cycles |
| Output Drive Strength | Fanout of 15 LSTTL loads - supports direct connection to legacy TTL buses without buffers |
| Quiescent Current | 4 µA max at 25°C - ensures ultra-low static power in battery-backed or standby logic |
| Input Leakage | ±0.1 µA max (VCC = 6.0 V) - prevents unintended state changes in high-impedance control lines |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded controller environments |
Pinout & Package
SOP-16 package (JEITA PRSP0016DH-B, Renesas code FP-16DAV), 5.5 mm × 10.06 mm body, 1.27 mm pitch, Ni/Pd/Au plating, tape-and-reel (2000 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (D2) | Data Input Bit 2 | True-level input for second bit of 4-bit write word; latched only when GW = L and WA/WB match address |
| 2 (D3) | Data Input Bit 3 | True-level input for third bit; no inversion - high input yields high output during subsequent read |
| 3 (D4) | Data Input Bit 4 | Fourth bit of write word; synchronized to internal latch clock derived from GW and address gates |
| 4 (RB) | Read Address Bit B | LSB of 2-bit read address; selects word 0–3 together with RA (pin 5) |
| 5 (RA) | Read Address Bit A | MSB of 2-bit read address; combined with RB to decode Q1–Q4 output source word |
| 6 (Q4) | Output Bit 4 | Three-state output; driven only when GR = L and RA/RB select matching word; high-impedance when GR = H |
| 7 (Q3) | Output Bit 3 | Bit 3 of currently selected 4-bit word; shares same GR enable and address decode as Q4 |
| 8 (GND) | Ground Reference | Primary return path for all I/O and internal logic; must be low-impedance for noise immunity |
| 9 (VCC) | Power Supply | Positive supply rail for HC-series CMOS logic; decoupling capacitor required within 10 mm |
| 10 (WA) | Write Address Bit A | MSB of 2-bit write address; controls which internal 4-bit latch accepts D1–D4 inputs |
| 11 (WB) | Write Address Bit B | LSB of 2-bit write address; must be stable before GW transition for reliable write capture |
| 12 (GW) | Write Enable | Active-low global write strobe; disables all data inputs when high, freezes stored data |
| 13 (GR) | Read Enable | Active-low output enable; places Q1–Q4 in high-impedance state when high, isolating bus |
| 14 (Q1) | Output Bit 1 | First bit of selected word; timing referenced to RA/RB setup and GR assertion |
| 15 (Q2) | Output Bit 2 | Second bit of selected word; matches Q1/Q3/Q4 propagation delay within ±3 ns (VCC = 4.5 V) |
| 16 (D1) | Data Input Bit 1 | Most significant bit of write word; sampled on GW low-to-high edge under valid WA/WB |
Key Features
| Feature | Design Value |
|---|---|
| Dual-port concurrent access | Independent read (RA/RB/GR) and write (WA/WB/GW) paths allow overlapping operations without arbitration logic |
| Three-state output control | GR pin disables all Q1–Q4 outputs simultaneously, enabling shared-bus topology with multiple register files |
| Wide voltage operation | 2.0–6.0 V supply range permits direct interface with 3.3 V microcontrollers and 5 V legacy peripherals |
| Low static power | 4 µA max ICC at 25°C eliminates thermal concerns in dense logic arrays and portable equipment |
| High noise immunity | VIL ≤ 1.35 V / VIH ≥ 3.15 V at VCC = 4.5 V ensures robust operation in electrically noisy industrial enclosures |
Applications
| Industrial PLC I/O Expansion | Microcontroller Peripheral Buffering |
|---|---|
Use Scenario: Adding discrete I/O points to a programmable logic controller using parallel bus expansion. IC Role / Device Role / Timing Role: 74HC670FPEL-E acts as an addressable 16-bit latch bank, storing output states and capturing input status under CPU control. Use Value: Enables 4-word × 4-bit parallel data exchange with deterministic 21 ns read latency and zero software overhead for port mirroring. |
Use Scenario: Offloading GPIO register management from an 8-bit MCU with limited internal RAM. IC Role / Device Role / Timing Role: 74HC670FPEL-E serves as external scratchpad memory for temporary sensor data aggregation prior to UART transmission. Use Value: Provides hardware-managed 16-bit storage with independent read/write addressing, eliminating need for software bit-banging or SRAM interface logic. |
| Digital Signal Path Sequencing | Legacy Bus Interface Translation |
Use Scenario: Storing intermediate values in a fixed-function digital filter or waveform generator. IC Role / Device Role / Timing Role: 74HC670FPEL-E functions as a pipeline register stage, holding coefficients or sample history with precise clock-aligned access. Use Value: Guarantees sub-25 ns access time and glitch-free output transitions, critical for maintaining signal integrity in multi-stage combinatorial logic. |
Use Scenario: Bridging between a modern FPGA's 3.3 V LVCMOS interface and a legacy 5 V ISA bus data latch. IC Role / Device Role / Timing Role: 74HC670FPEL-E operates as a level-translating register buffer, accepting 3.3 V writes and driving 5 V-tolerant outputs. Use Value: Eliminates discrete level shifters by leveraging its 2–6 V supply range and 15-LSTTL drive strength for direct 5 V bus loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar register-file logic applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC670N | DIP-16 package only; identical electrical specs and pinout; no SOP variant available | Requires through-hole PCB layout; unsuitable for surface-mount production or space-constrained designs | Select SN74HC670N only for prototyping or legacy DIP-based systems where reflow compatibility is not required |
| 74AC670PC | Faster tPD = 10 ns (VCC = 5 V); higher ICC = 40 µA; AC-series noise sensitivity limits industrial use | Better suited for high-speed test equipment; not rated for –40°C operation or long-term reliability in factory automation | Choose 74AC670PC only when 10 ns access time is mandatory and ambient temperature remains >0°C |
Compared with SN74HC670N and 74AC670PC, the 74HC670FPEL-E uniquely combines SOP-16 surface-mount compatibility, industrial temperature range (–40°C to +85°C), and ultra-low quiescent current (4 µA), making it optimal for volume-manufactured embedded controllers requiring long-term stability and reflow process support.
Availability
74HC670FPEL-E is available at Aetrix Electronics and suitable for industrial PLCs, microcontroller peripheral expansion, digital signal sequencing, and legacy bus interface translation requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 74HC670FPEL-E 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and logic devices for industrial, automotive, and infrastructure applications.
The 74HC670FPEL-E belongs to Renesas' legacy HC-series logic portfolio, designed specifically for reliable, low-power register-file functionality in deterministic digital control systems.
FAQ
What is the maximum clock frequency supported by the 74HC670FPEL-E?
The 74HC670FPEL-E does not operate on a clock signal - it is an asynchronous register file controlled by enable and address strobes. Its maximum operational speed is determined by propagation delays: read access time is 21 ns typical (VCC = 4.5 V, CL = 50 pF), allowing up to ~30 MHz effective throughput in tightly timed control sequences. The 74HC670FPEL-E has no internal oscillator or clock input pin.
Does the 74HC670FPEL-E support true dual-port operation with independent read and write clocks?
No - the 74HC670FPEL-E supports concurrent read and write operations but uses shared enable timing rather than independent clocks. Both read (GR) and write (GW) paths respond to level-sensitive enables, not edge-triggered clocks. The 74HC670FPEL-E achieves dual-port behavior through combinational address decoding and gated latches, not clock-domain isolation.
Can the 74HC670FPEL-E be operated at 3.3 V supply voltage?
Yes - the 74HC670FPEL-E is fully specified for VCC = 2.0–6.0 V, including 3.3 V operation. At 3.3 V, VOH ≥ 2.97 V and VOL ≤ 0.33 V (IOL = 6 mA), ensuring clean interfacing with 3.3 V microcontrollers and FPGAs. All timing parameters remain valid, with read access time increasing to 32 ns max at 3.3 V.
Is the 74HC670FPEL-E pin-compatible with the SN74HC670N?
Yes - the 74HC670FPEL-E and SN74HC670N share identical pin functions and signal assignments across all 16 pins. The only difference is package type: SOP-16 vs. DIP-16. PCB layout must account for footprint and soldering method differences, but logic-level connectivity and timing behavior are functionally identical.
What happens to the outputs of the 74HC670FPEL-E when GR is high?
When GR (Read Enable) is high, all four outputs (Q1–Q4) enter high-impedance (Hi-Z) state regardless of read address or stored data. This allows safe connection to shared data buses without contention. The 74HC670FPEL-E maintains internal latch states unchanged - only output drivers are disabled. Outputs return to active drive within 33 ns after GR transitions low.
74HC670FPEL-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74HC
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Register File
- Circuit:
- 1 x 1:1
- Independent Circuits:
- 4
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
74HC670FPEL-E FAQ
1.How can I place an order for 74HC670FPEL-E through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC670FPEL-E 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 74HC670FPEL-E reliable?
The price and inventory of 74HC670FPEL-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC670FPEL-E is usually 5 days.
3.What payment methods are accepted for 74HC670FPEL-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC670FPEL-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC670FPEL-E?
74HC670FPEL-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC670FPEL-E 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 74HC670FPEL-E?
For technical support, including 74HC670FPEL-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC670FPEL-E requirements.
6.How does Aetrix verify that 74HC670FPEL-E is sourced from the original manufacturer or authorized distributors?
All 74HC670FPEL-E 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 74HC670FPEL-E meets industry standards.
7.What is the process for return or replacement of 74HC670FPEL-E?
All 74HC670FPEL-E units undergo pre-shipment inspection (PSI). If there is an issue with 74HC670FPEL-E, 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 74HC670FPEL-E part is unused and in its original packaging.
Return procedure for 74HC670FPEL-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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