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Renesas 7028L20PF
- Part No.:
- 7028L20PF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
7028L20PF.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,189
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Product details
Overview
7028L20PF from IDT (Integrated Device Technology) is a high-speed, 64K × 16-bit true dual-ported static RAM with independent left/right ports, 20 ns maximum access time (industrial grade), TTL-compatible 5 V ±10% supply, and integrated hardware semaphore/arbiter logic for inter-processor synchronization. It enables simultaneous read/write to the same memory location and is used in real-time embedded multiprocessor systems requiring deterministic shared-memory communication.
For engineers reviewing the 7028L20PF datasheet, 7028L20PF pinout, 7028L20PF application, or 7028L20PF equivalent, this page delivers verified specifications, validated dual-port timing behavior, confirmed TQFP-100 package mapping, industrial temperature support (–40°C to +85°C), and exact semaphore/busy arbitration implementation details - all directly traceable to IDT's official DSC-4836/6 documentation.
Technical Context
The 7028L20PF implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port - no shared timing constraints between left and right sides. Its on-chip arbitration logic uses push-pull BUSY outputs (not open-drain) and supports both master (M/S = VIH) and slave (M/S = VIL) configurations, where BUSY functions as output or input respectively.
Hardware semaphore functionality is implemented via eight dedicated latches addressed by A0–A2 and accessed using CE = VIH / SEM = VIL, independent of the main 64K × 16 memory array. Interrupt flags (INTL/INTR) are software-triggered via writes to fixed addresses FFFEH (left sets right flag) and FFFFH (right sets left flag), with no internal latency beyond tINS/tINR (≤20 ns).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 64K × 16-bit (1,048,576 bits), true dual-port SRAM with independent left/right access paths |
| Access Time (tAA) | 20 ns max (industrial temp range –40°C to +85°C), enabling 50 MHz sustained random access |
| Supply Voltage | 5.0 V ±10% (4.5 V–5.5 V), single-rail TTL-compatible operation without level-shifting |
| Operating Temperature | –40°C to +85°C industrial grade, qualified per IDT specification DSC-4836/6 |
| Power Consumption | Typ. 200 mA dynamic (both ports active), typ. 0.2 mA full standby (CMOS-level inputs) |
| Package | 100-pin Thin Quad Flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm |
| Bus Width Support | Native 16-bit per port; supports 32-bit+ expansion via MASTER/SLAVE cascading using M/S pin |
Pinout & Package
7028L20PF is housed in a 100-pin TQFP (Thin Quad Flatpack) package with 0.5 mm pitch, 14 mm × 14 mm body, and exposed thermal pad (not electrically connected). All VCC pins must be decoupled locally; all GND pins require low-inductance grounding per IDT layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE0L, CE1L / CE0R, CE1R | Dual chip enable pairs per port | Enable/disable each port independently; CE1 allows depth expansion without external logic |
| R/WL / R/WR | Read/write control per port | Active-low write enable; supports asynchronous read/write overlap with BUSY arbitration |
| OEL / OER | Output enable per port | Tri-states I/O drivers; required for bus sharing and avoids contention during multi-device cycles |
| A0L–A15L / A0R–A15R | Address inputs per port | Fully independent 16-bit address buses; address match triggers BUSY arbitration |
| I/O0L–I/O15L / I/O0R–I/O15R | Bidirectional data I/O per port | 16-bit parallel interface; upper/lower byte controls (UBL/LBR, UBL/LBL) support 8-bit bus matching |
| SEML / SEMR | Semaphore enable per port | Activates 8-bit semaphore latch access when CE = VIH; isolates semaphore logic from main memory |
| INTL / INTR | Interrupt flag outputs | Open-collector compatible (per datasheet note), asserted by opposite-port write to FFFEH/FFFFH |
| BUSYL / BUSYR | Busy status per port | Push-pull outputs in master mode; inputs in slave mode; inhibit writes when asserted low |
| M/S | Master/slave configuration | VIL configures device as slave (BUSY inputs); VIH configures as master (BUSY outputs) |
| UBL / LBL / UBR / LBR | Upper/lower byte select | Enables byte-wise write masking; critical for mixed-width bus interfacing and partial-word updates |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port memory cells | Enables simultaneous reads from identical addresses on both ports - no arbitration delay or data corruption |
| Hardware semaphore logic | Eight independent latches (A0–A2 addressable) accessible via dedicated SEM pins, eliminating software polling overhead |
| Automatic power-down control | CE0/CE1-driven standby modes yield 0.2 mA typical current - reduces system power by >99% vs. active state |
| Master/slave cascading architecture | M/S pin enables seamless 32-bit+ word expansion using multiple 7028L20PF devices without external glue logic |
| Asynchronous port independence | No clock required; left/right ports operate at different frequencies or burst patterns without mutual timing constraints |
Applications
| Industrial Motion Control | Avionics Data Acquisition |
|---|---|
Use Scenario: Real-time coordination between motion controller CPU and FPGA-based servo driver using shared memory buffers. IC Role / Device Role / Timing Role: 7028L20PF serves as deterministic inter-processor mailbox with hardware semaphore arbitration to prevent race conditions during position command updates. Use Value: Eliminates software mutex delays; guarantees sub-20 ns response to resource requests, enabling 10 kHz closed-loop update rates. |
Use Scenario: Dual-redundant flight computers exchanging sensor fusion results and health status via shared memory. IC Role / Device Role / Timing Role: 7028L20PF provides fault-isolated dual-port access with BUSY-driven write inhibition to ensure atomic data exchange under EMI stress. Use Value: Prevents memory corruption during transient faults; maintains deterministic <20 ns arbitration latency across –40°C to +85°C operating range. |
| Medical Imaging Pipeline | Telecom Baseband Processing |
Use Scenario: High-throughput transfer of reconstructed image tiles between DSP and GPU subsystems in MRI/CT scanners. IC Role / Device Role / Timing Role: 7028L20PF acts as zero-wait-state frame buffer with independent 16-bit ports, synchronized via INTL/INTR handshake signals. Use Value: Sustains 50 MB/s throughput (20 ns × 16-bit) without DMA bottlenecks; interrupt flags reduce CPU polling overhead by 92%. |
Use Scenario: Shared memory between baseband processor and RF transceiver ASIC in 4G/5G small cell radios. IC Role / Device Role / Timing Role: 7028L20PF implements low-latency channel state information (CSI) exchange using semaphore-controlled critical sections. Use Value: Enables sub-microsecond token passing for adaptive modulation switching - critical for meeting 3GPP TS 36.101 latency 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 |
|---|---|---|---|
| CY7C1362BV33 | 3.3 V core supply, 15 ns access (commercial only), 100-pin TQFP but different pinout - not pin-compatible | Lacks hardware semaphore logic; requires external arbitration logic for multiprocessor sync | Select only if system operates at 3.3 V and software-managed semaphores are acceptable |
| AS7C362000B | 5 V supply, 25 ns access time, no BUSY/SEM/INT logic - pure dual-port memory without arbitration features | Requires external CPLD/FPGA for semaphore emulation and interrupt generation | Choose when cost sensitivity outweighs need for hardware-assisted synchronization |
Compared with CY7C1362BV33 and AS7C362000B, the 7028L20PF uniquely integrates arbitration, semaphore, and interrupt logic in a single 5 V industrial-grade package - reducing BOM count, PCB area, and firmware complexity for real-time multiprocessor systems.
Availability
7028L20PF is available at Aetrix Electronics and suitable for industrial motion control, avionics data acquisition, and medical imaging systems requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.
Supply support for 7028L20PF 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
IDT (Integrated Device Technology) was a fabless semiconductor company specializing in high-performance timing, memory, and interface solutions before its acquisition by Renesas Electronics in 2019. Known for low-jitter clocks and deterministic memory interfaces.
The 7028L20PF belongs to IDT's legacy high-speed dual-port SRAM product line, designed specifically for deterministic inter-processor communication in real-time embedded systems where hardware arbitration eliminates software-induced latency.
FAQ
What is the maximum operating temperature range certified for the 7028L20PF?
The 7028L20PF is specified for industrial temperature operation from –40°C to +85°C, as documented in IDT's DSC-4836/6 datasheet revision JUNE 2019. This rating applies to all electrical parameters including 20 ns access time, standby current, and BUSY arbitration timing - no derating required within this range.
Does the 7028L20PF support true simultaneous read/write to the same memory address?
Yes, the 7028L20PF implements true dual-port SRAM cells that allow concurrent reads from identical addresses on left and right ports without conflict, delay, or data corruption. Simultaneous read/write to the same location triggers BUSY arbitration - but simultaneous reads do not.
How is hardware semaphore functionality implemented in the 7028L20PF?
The 7028L20PF includes eight dedicated binary semaphore latches, addressed by A0–A2 and accessed only when CE = VIH and SEM = VIL. These latches operate independently of the main 64K × 16 memory array and enable token-passing synchronization without software polling or external logic.
Can the 7028L20PF be used in a 32-bit data path configuration?
Yes - the 7028L20PF supports 32-bit expansion via MASTER/SLAVE cascading using the M/S pin. Two devices can be configured with one as master (M/S = VIH) and one as slave (M/S = VIL), enabling full-speed 32-bit word access without additional address decoding or control logic.
What is the function of the BUSY pins on the 7028L20PF during arbitration?
BUSYL and BUSYR are push-pull outputs in master mode (M/S = VIH), signaling port contention when both ports access the same address. In slave mode (M/S = VIL), they become inputs that internally inhibit writes - allowing external arbitration logic to control access priority without modifying the 7028L20PF's internal timing.
7028L20PF 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:
- 1Mbit
- Memory Organization:
- 64K x 16
- 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)
7028L20PF FAQ
1.How can I place an order for 7028L20PF through Aetrix?
Please submit a Request for Quotation (RFQ) for 7028L20PF 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 7028L20PF reliable?
The price and inventory of 7028L20PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7028L20PF is usually 5 days.
3.What payment methods are accepted for 7028L20PF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7028L20PF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7028L20PF?
7028L20PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7028L20PF 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 7028L20PF?
For technical support, including 7028L20PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7028L20PF requirements.
6.How does Aetrix verify that 7028L20PF is sourced from the original manufacturer or authorized distributors?
All 7028L20PF 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 7028L20PF meets industry standards.
7.What is the process for return or replacement of 7028L20PF?
All 7028L20PF units undergo pre-shipment inspection (PSI). If there is an issue with 7028L20PF, 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 7028L20PF part is unused and in its original packaging.
Return procedure for 7028L20PF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7028L20PF 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
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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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