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Renesas 7034L20PF
- Part No.:
- 7034L20PF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
7034L20PF.pdf
- Description:
- IC SRAM 72KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,160
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Product details
Overview
7034L20PF from Integrated Device Technology (IDT) is an obsolete high-speed 4K × 18 dual-port static RAM with true independent left/right ports, 20 ns max access time, TTL-compatible 5V ±10% supply, and industrial temperature range (–40°C to +85°C). It supports simultaneous read/write to same location, on-chip semaphore arbitration, and battery-backed data retention down to 2V.
For engineers reviewing the 7034L20PF datasheet, 7034L20PF pinout, 7034L20PF application, or 7034L20PF equivalent, this page delivers verified functional identity, validated pin roles, confirmed timing specs (tRC = 20 ns), real-world dual-processor synchronization use cases, and two technically documented alternative parts for legacy system maintenance.
Technical Context
The 7034L20PF implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port-enabling concurrent read/write operations without internal contention. Its on-chip arbitration logic resolves port-to-port address conflicts via BUSY flag assertion (tBAA ≤ 20 ns) and supports master/slave cascading for 36-bit+ bus expansion.
It integrates eight hardware semaphores (addressed by A0–A2), each writable via I/O0 and readable across all 18 I/O lines, enabling deterministic inter-processor resource locking. Interrupt flags (INTL/INTR) are triggered by writes to dedicated mailbox addresses (FFEh/FFFh), with tINS ≤ 20 ns setup and tINR ≤ 20 ns reset timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 18 bits (72 Kbit total); enables parity support or 36-bit word systems via master/slave configuration |
| Access Time (tRC) | 20 ns max (industrial temp); guarantees full-speed operation in real-time dual-processor memory sharing |
| Supply Voltage | 5.0 V ±10%; TTL-compatible interface eliminates level-shifting in legacy 5V systems |
| Standby Current (ISB3) | 0.2 mA typ. (full standby, CMOS inputs); enables low-power battery backup mode with 2V data retention |
| Operating Temperature | –40°C to +85°C; qualified for industrial embedded control and telecom infrastructure applications |
| Package | 100-pin TQFP (14 mm × 14 mm); surface-mount compatible with standard reflow profiles |
| Bus Width Control | Separate UBL/LBL and UBR/LBR pins; allows byte-selective writes for multiplexed 16-bit or 32-bit host interfaces |
Pinout & Package
7034L20PF is housed in a 100-pin Thin Quad Flatpack (TQFP) with 0.5 mm pitch, body size ≈ 14 mm × 14 mm × 1.4 mm. All VCC and GND pins must be connected per datasheet layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A11L / A0R–A11R | Address Inputs (Left/Right) | 12-bit independent address buses; enable simultaneous access to any of 4K locations per port |
| I/O0L–I/O17L / I/O0R–I/O17R | Bidirectional Data I/O (Left/Right) | 18-bit parallel data paths; support full-word or byte-selective transfers using UBL/LBL/UBR/LBR |
| CEL / CER | Chip Enable (Left/Right) | Active-low enables; controls port power-down (ISB3 = 0.2 mA) and initiates memory access cycles |
| OEL / OER | Output Enable (Left/Right) | Active-low tri-states I/O drivers; allows shared bus operation without external bus transceivers |
| R/WL / R/WR | Read/Write Control (Left/Right) | Active-low determines direction; combined with CE and byte enables defines full read/write timing windows |
| SEML / SEMR | Semaphore Enable (Left/Right) | Active-low selects semaphore register access (A0–A2) instead of RAM array; enables inter-processor locking |
| INTL / INTR | Interrupt Flag Output (Left/Right) | Open-drain push-pull outputs; asserted when opposite port writes to FFEh (INTL) or FFFh (INTR) |
| BUSYL / BUSYR | Busy Flag (Left/Right) | Push-pull outputs in master mode (M/S = VIH); indicate address collision and gate write signals internally |
| M/S | Master/Slave Select | High = master (BUSY outputs); Low = slave (BUSY inputs); required for cascaded width expansion |
| UBL / UBR / LBL / LBR | Upper/Lower Byte Select | Enable selective 9-bit writes to upper (I/O9–I/O17) or lower (I/O0–I/O8) byte lanes |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Independent, asynchronous access from left and right ports-no performance penalty during simultaneous reads to same address |
| Hardware Semaphore Logic | Eight dedicated binary flags (A0–A2) accessible via I/O0 write and full 18-bit read; eliminates software polling overhead in multi-CPU systems |
| Master/Slave Cascading | Single M/S pin configures device as master (BUSY output) or slave (BUSY input); enables error-free 36-bit+ memory expansion without external logic |
| On-Chip BUSY Arbitration | Hardware-resolved port conflict detection (tBAA ≤ 20 ns); automatically gates write signals on contending port to prevent data corruption |
| Battery Backup Support | Valid data retention at VCC = 2.0 V (ICCDR ≤ 4000 µA); sustains critical state during main power loss in industrial controllers |
Applications
| Industrial Motion Controller | Telecom Line Card |
|---|---|
|
Use Scenario: Two DSPs coordinate motor trajectory calculation and real-time PWM update via shared memory. IC Role / Device Role / Timing Role: 7034L20PF serves as synchronized dual-access buffer with hardware semaphore arbitration to prevent race conditions during parameter updates. Use Value: Eliminates software mutex overhead; ensures deterministic <20 ns inter-processor handshaking latency under worst-case industrial temperature. |
Use Scenario: Host processor and line-interface ASIC exchange packet headers and status in high-throughput TDM backplane. IC Role / Device Role / Timing Role: 7034L20PF acts as non-blocking 72-Kbit message buffer with independent 18-bit I/O lanes for parallel header/data transfer. Use Value: Sustains 50 MHz effective throughput (tRC = 20 ns) without wait states; UBL/LBL enables byte-aligned DMA to legacy 16-bit peripherals. |
| Avionics Display Processor | Medical Imaging Subsystem |
|
Use Scenario: Graphics controller and safety monitor share frame metadata and health telemetry in DO-254-certified display unit. IC Role / Device Role / Timing Role: 7034L20PF provides fault-isolated dual-port memory with interrupt-driven mailbox (FFEh/FFFh) for priority-safe status reporting. Use Value: Hardware-interrupt response ≤20 ns (tINS) meets avionics hard-real-time deadlines; 2V data retention preserves last-known-good state during brownout. |
Use Scenario: FPGA-based image acquisition engine and ARM application processor jointly manage DICOM tag buffers and raw pixel FIFOs. IC Role / Device Role / Timing Role: 7034L20PF functions as low-latency shared memory with BUSY-controlled write gating to prevent corrupted pixel stream writes during DRAM refresh. Use Value: On-chip BUSY arbitration (tBDD ≤ 30 ns) avoids external arbitration logic; reduces BOM count and improves EMI performance in Class II medical devices. |
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, 3.3V core (5V tolerant I/O), 100-pin TQFP; lower active power (ICC = 120 mA typ.), no battery retention | Requires level translation in pure 5V systems; lacks 2V data retention but supports modern low-voltage designs | Preferred for new 3.3V-based upgrades where legacy 5V compatibility is not mandatory |
| IDT70V27L20PF | 4K × 18, 20 ns, 3.3V supply, 100-pin TQFP; integrated voltage regulator, ISB = 10 µA typ., no BUSY arbitration | Eliminates external 5V rail but removes hardware BUSY logic-requires software arbitration or external glue logic | Selected when ultra-low standby power is critical and system firmware can manage contention |
Compared with 7034L20PF, CY7C028V-20AXC offers lower power and 3.3V compatibility but omits battery backup; IDT70V27L20PF achieves microamp standby and integrated regulation yet sacrifices on-chip BUSY arbitration-requiring design-level trade-offs in reliability versus power efficiency.
Availability
7034L20PF is available at Aetrix Electronics and suitable for industrial motion control, telecom line cards, avionics displays, and medical imaging subsystems requiring stable component supply for legacy system sustainment and obsolescence mitigation.
Supply support for 7034L20PF 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 pioneered high-performance dual-port SRAM architectures for real-time multiprocessing.
The IDT7034 family was designed specifically for deterministic inter-processor communication in industrial, telecom, and aerospace systems-delivering hardware-enforced arbitration, low-latency memory sharing, and robust operation across extended temperature ranges.
FAQ
Is 7034L20PF still recommended for new designs?
No. The 7034L20PF is marked "OBSOLETE PART" and "NOT RECOMMENDED FOR NEW DESIGNS" per IDT's May 2018 datasheet (DSC 4089/11). It remains available for legacy system repair and obsolescence management, but design-in should be avoided. Aetrix Electronics supports long-term supply planning and cross-reference guidance for migration paths.
What is the function of the M/S pin on 7034L20PF?
The M/S (Master/Slave Select) pin configures 7034L20PF for cascaded memory expansion: when high (VIH), it operates as a master with BUSYL/BUSYR as push-pull outputs for arbitration; when low (VIL), it becomes a slave with BUSYL/BUSYR as write-inhibit inputs. This enables seamless 36-bit+ word systems without external logic.
Does 7034L20PF support true simultaneous read operations to the same memory address?
Yes. The 7034L20PF uses true dual-ported memory cells that allow concurrent reads from both left and right ports to identical addresses without contention, delay, or data corruption-verified in Truth Table I and Functional Description section of the datasheet.
How does the semaphore functionality work in 7034L20PF?
The 7034L20PF includes eight hardware semaphore flags addressed by A0–A2. When SEM = VIL, writes to I/O0 set the flag; reads return the value across all 18 I/O lines. This enables lock-step inter-processor coordination without software polling-critical for deterministic real-time systems using the 7034L20PF.
What is the minimum supply voltage for data retention in 7034L20PF?
The 7034L20PF guarantees data retention down to VCC = 2.0 V (per Table 10, VDR = 2.0 V), with typical retention current ICCDR = 100 µA (commercial) or 4000 µA (industrial). This battery backup capability is exclusive to the 'L' (low-power) variant and is not available in the 'S' version.
7034L20PF 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
7034L20PF FAQ
1.How can I place an order for 7034L20PF through Aetrix?
Please submit a Request for Quotation (RFQ) for 7034L20PF 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 7034L20PF reliable?
The price and inventory of 7034L20PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7034L20PF is usually 5 days.
3.What payment methods are accepted for 7034L20PF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7034L20PF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7034L20PF?
7034L20PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7034L20PF 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 7034L20PF?
For technical support, including 7034L20PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7034L20PF requirements.
6.How does Aetrix verify that 7034L20PF is sourced from the original manufacturer or authorized distributors?
All 7034L20PF 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 7034L20PF meets industry standards.
7.What is the process for return or replacement of 7034L20PF?
All 7034L20PF units undergo pre-shipment inspection (PSI). If there is an issue with 7034L20PF, 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 7034L20PF part is unused and in its original packaging.
Return procedure for 7034L20PF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7034L20PF Tags
-
M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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