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Renesas 7034L20PFI
- Part No.:
- 7034L20PFI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
7034L20PFI.pdf
- Description:
- IC SRAM 72KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,698
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Product details
Overview
7034L20PFI from Integrated Device Technology (IDT) is an obsolete high-speed 4K × 18 dual-port static RAM with true asynchronous dual-port architecture, 20 ns max access time (industrial grade), 1 mA typical standby current, and TTL-compatible 5 V ±10% operation - used in legacy multiprocessing systems requiring concurrent left/right port access to shared memory without arbitration overhead.
For engineers reviewing the 7034L20PFI datasheet, 7034L20PFI pinout, 7034L20PFI application, or 7034L20PFI equivalent, this page delivers verified technical context, validated pin functions, confirmed industrial-temperature operation (–40°C to +85°C), battery-backed data retention at 2 V, and precise master/slave BUSY arbitration behavior for system-level integration.
Technical Context
The 7034L20PFI implements fully independent left and right ports with separate address (A0–A11), control (CEL/CER, R/WL/R/WR, OEL/OER), and 18-bit I/O buses (I/O0–I/O17 per port), enabling simultaneous read/write to identical or distinct addresses. Its on-chip arbitration logic resolves port contention via BUSY flag assertion based solely on chip enable and address match timing - not data or R/W state.
It supports semaphore signaling across eight dedicated flags (addressed by A0–A2), interrupt generation via mailbox locations FFEH (left) and FFFH (right), and byte-selectable writes using UBL/UBR and LBL/LBR - all operating under full 5 V TTL logic levels with push-pull BUSY/INT outputs and no external pull-ups required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4,096 × 18 bits (72 Kbit), two independent addressable ports |
| Access Time (max) | 20 ns - guarantees worst-case read latency under industrial temperature (–40°C to +85°C) and 5 V ±10% supply |
| Standby Current (typ) | 1 mA - enables low-power hold mode during processor idle cycles without battery drain |
| Data Retention Voltage | 2.0 V - maintains SRAM contents during main power loss using backup battery |
| Operating Supply | 5.0 V ±10% - single TTL-compatible rail; no auxiliary voltage required |
| Temperature Range | –40°C to +85°C - qualified for industrial embedded control and telecom infrastructure |
| Package | 100-pin Thin Quad Flatpack (TQFP), 14 mm × 14 mm body - surface-mount compatible with standard reflow profiles |
Pinout & Package
7034L20PFI is housed in a 100-pin TQFP (PN100) package with 0.5 mm pitch, 14 mm × 14 mm footprint, and 1.4 mm height. All VCC pins require local decoupling; all GND pins must be connected to system ground plane for signal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A11L / A0R–A11R | Address Inputs (Left/Right) | 12-bit address bus per port; enables independent addressing of any of 4K locations on each side |
| I/O0L–I/O17L / I/O0R–I/O17R | Bidirectional Data Bus (Left/Right) | 18-bit parallel interface per port; supports full-word or byte-selectable transfers via UBL/LBL and UBR/LBR |
| CEL / CER | Chip Enable (Left/Right) | Active-low enable controlling port power-down; high = standby (1 mA typ), low = active (850 mW typ) |
| R/WL / R/WR | Read/Write Control (Left/Right) | Active-low write enable; high = read, low = write - fully asynchronous with no inter-port timing dependency |
| OEL / OER | Output Enable (Left/Right) | Active-low tri-state control for I/O drivers; allows bus sharing without external transceivers |
| UBL / UBR / LBL / LBR | Byte Select (Upper/Lower) | Enable 9-bit upper or lower byte writes independently - essential for multiplexed bus compatibility |
| SEML / SEMR | Semaphore Enable | Low = access 8 semaphore flags (A0–A2); high = normal RAM access - hardware resource locking without software polling |
| INTL / INTR | Interrupt Flag Output | Open-drain capable (push-pull), asserted when opposite port writes to mailbox address FFEH (left) or FFFH (right) |
| BUSYL / BUSYR | Busy Flag (Master Output / Slave Input) | In master mode (M/S = VIH): push-pull output indicating port contention; in slave mode (M/S = VIL): write-inhibit input |
| M/S | Master/Slave Select | High = BUSY outputs enabled for arbitration; low = BUSY inputs for cascaded width expansion with one master |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Enables simultaneous reads from same memory location on both ports - eliminates read collision risk in lock-free buffer designs |
| Hardware Semaphore Logic | Eight dedicated binary flags (A0–A2) accessible via SEM pin; enables atomic resource ownership handoff between processors without polling overhead |
| Master/Slave Cascading | Single M/S pin configures device as master (BUSY output) or slave (BUSY input), supporting error-free 36-bit+ word expansion without external glue logic |
| On-Chip BUSY Arbitration | Automatic port-to-port conflict detection and write inhibition - resolves contention in ≤20 ns without CPU intervention or external arbitration circuitry |
| 2 V Data Retention | Maintains full 72 Kbit content during main power failure using coin-cell backup - critical for telecom line cards and industrial PLCs |
Applications
| Telecom Line Card Buffering | Industrial PLC Shared Memory |
|---|---|
|
Use Scenario: Dual-processor telecom line card where DSP handles real-time signal processing while MCU manages protocol stack and diagnostics. IC Role / Device Role / Timing Role: 7034L20PFI serves as zero-wait-state shared message buffer with concurrent read/write access - DSP writes processed frames to RAM while MCU reads status and configures parameters. Use Value: Eliminates software mutexes and reduces inter-processor latency to sub-20 ns, enabling deterministic frame handling at E1/T1 rates. |
Use Scenario: Redundant controller pair in safety-critical PLC where primary and backup CPUs synchronize state via shared memory. IC Role / Device Role / Timing Role: 7034L20PFI provides fault-tolerant dual-access RAM with hardware semaphore support - primary CPU updates I/O image while backup monitors changes and assumes control on failure. Use Value: Hardware-enforced semaphore flags ensure atomic ownership transfer, preventing race conditions during failover without CPU cycle overhead. |
| Avionics Sensor Fusion Hub | Legacy Military Radio Baseband |
|
Use Scenario: Multi-sensor avionics unit fusing GPS, INS, and radar data streams using two synchronized ARM cores. IC Role / Device Role / Timing Role: 7034L20PFI acts as time-aligned data exchange buffer - one core writes timestamped sensor samples while the other performs Kalman filtering on prior batches. Use Value: 20 ns access time and true dual-port concurrency guarantee sample coherency across cores without pipeline stalls or FIFO bottlenecks. |
Use Scenario: Secure HF/VHF radio with separate encryption and modulation processors sharing waveform parameters and key material. IC Role / Device Role / Timing Role: 7034L20PFI functions as tamper-resistant shared memory - encryption engine writes keys to protected region while modulator reads them for real-time cipher chaining. Use Value: Battery-backed 2 V retention preserves cryptographic keys during power interruption, meeting MIL-STD-461E transient immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C028V-20AXC | 4K × 18, 20 ns access, 3.3 V core (5 V tolerant I/O), 35 mA active current vs. 160 mA for 7034L20PFI | Requires level-shifting for pure 5 V systems; lacks native 2 V data retention and integrated semaphore logic | Choose for lower power and modern 3.3 V designs where legacy 5 V TTL compatibility is not mandatory |
| IDT70V27L25PF | 4K × 18, 25 ns access, 3.3 V supply only, no 2 V retention, but supports JTAG boundary scan | Not pin-compatible; requires PCB redesign; no BUSY arbitration - relies on external logic or software coordination | Prefer for new 3.3 V designs needing testability; avoid if hardware arbitration or battery backup is required |
Compared with CY7C028V-20AXC and IDT70V27L25PF, the 7034L20PFI uniquely delivers 5 V TTL compatibility, 2 V data retention, and integrated hardware semaphore/BUSY logic - making it irreplaceable in legacy industrial and defense systems where these features are design-critical and cannot be replicated externally.
Availability
7034L20PFI is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and avionics subsystems requiring stable component supply despite its obsolete status - supported via verified last-time-buy inventory and traceable legacy sourcing.
Supply support for 7034L20PFI 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
Integrated Device Technology (IDT) was a fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions before its acquisition by Renesas in 2019. IDT designed high-performance memory products for demanding real-time systems.
The IDT7034 family was engineered specifically for multiprocessing architectures requiring deterministic, contention-free shared memory - targeting telecom switching fabric, industrial control, and military communications where hardware arbitration and data retention were non-negotiable.
FAQ
Is 7034L20PFI still in production?
No, 7034L20PFI is officially obsolete and not recommended for new designs per IDT's May 2018 documentation. However, Aetrix Electronics maintains verified legacy stock from authorized channels with full traceability, supporting repair, sustainment, and long-life program continuity for existing deployed systems.
What does the "L" in 7034L20PFI signify?
The "L" denotes the low-power variant of the IDT7034 family, characterized by 1 mA typical standby current (vs. 5 mA for "S" version) and guaranteed 2 V data retention capability - critical for battery-backed applications such as telecom line cards and military radios where main power may be interrupted.
How does BUSY arbitration work on 7034L20PFI?
When configured as master (M/S = VIH), 7034L20PFI asserts BUSYL or BUSYR within 20 ns if both ports attempt access to the same address simultaneously. The BUSY signal gates the write path on the delayed port, allowing the earlier access to complete - resolving contention entirely in hardware without CPU involvement or external logic.
Can 7034L20PFI operate with only one port active?
Yes - 7034L20PFI supports asymmetric operation: either port can be fully disabled via its CE pin (e.g., CEL = VIH), reducing that port's current draw to 1 mA standby while the other remains fully functional at 20 ns access speed. This enables flexible power management in multi-mode systems.
What are the valid interrupt mailbox addresses for 7034L20PFI?
The 7034L20PFI uses fixed interrupt mailbox addresses: writing to FFEH (hex) on the right port asserts INTL on the left port, and writing to FFFH on the left port asserts INTR on the right port. These locations function as user-defined message registers when interrupts are enabled, or as standard RAM otherwise.
7034L20PFI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 100-LQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 72Kbit
- Memory Organization:
- 4K x 18
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 20ns
- Access Time:
- 20 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
7034L20PFI FAQ
1.How can I place an order for 7034L20PFI through Aetrix?
Please submit a Request for Quotation (RFQ) for 7034L20PFI 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 7034L20PFI reliable?
The price and inventory of 7034L20PFI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7034L20PFI is usually 5 days.
3.What payment methods are accepted for 7034L20PFI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7034L20PFI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7034L20PFI?
7034L20PFI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7034L20PFI 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 7034L20PFI?
For technical support, including 7034L20PFI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7034L20PFI requirements.
6.How does Aetrix verify that 7034L20PFI is sourced from the original manufacturer or authorized distributors?
All 7034L20PFI 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 7034L20PFI meets industry standards.
7.What is the process for return or replacement of 7034L20PFI?
All 7034L20PFI units undergo pre-shipment inspection (PSI). If there is an issue with 7034L20PFI, 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 7034L20PFI part is unused and in its original packaging.
Return procedure for 7034L20PFI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7034L20PFI Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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