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Renesas 7024S55G
- Part No.:
- 7024S55G
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 84-BPGA
- Datasheet:
-
7024S55G.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 84PGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,617
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Product details
Overview
7024S55G from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 55 ns max read cycle time (tRC), TTL-compatible 5V ±10% supply, and on-chip semaphore/arbiration logic for concurrent access coordination in real-time systems such as digital signal processors and military avionics.
For engineers reviewing the 7024S55G datasheet, 7024S55G pinout, 7024S55G application, or 7024S55G equivalent, key selection criteria include dual-port arbitration timing (tAPS = 5 ns), BUSY flag behavior under M/S = H/L configuration, battery-backed data retention at 2V (IDT7024L variant), and compatibility with 84-pin PGA/PLCC/Flatpack or 100-pin TQFP footprints.
Technical Context
The 7024S55G implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port - enabling simultaneous reads from the same memory location without contention. Its on-chip arbitration logic resolves port conflicts via BUSY flag assertion and supports master/slave cascading for 32-bit+ bus expansion.
It integrates full hardware semaphore signaling (8 flags addressed by A0–A2), interrupt flag generation (INTL/INTR), and separate upper/lower byte enables (UBL/UBR, LBL/LBR) to support multiplexed bus architectures. The device operates across commercial (0°C to +70°C) and industrial (–40°C to +85°C) temperature ranges, with the 'S' suffix denoting standard-power operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 16 bits (64 Kbit total); supports independent 16-bit word access per port |
| Max Read Cycle Time (tRC) | 55 ns - defines minimum interval between consecutive read operations on same port |
| Access Time (tAA) | 55 ns max - delay from valid address to stable output data under CE/OE active |
| Supply Voltage | 5.0 V ±10% - single TTL-compatible rail; no auxiliary supplies required |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded systems |
| Power Consumption | Active: 155 mA typ. (775 mW @ 5V); Standby (ISB1): 16 mA typ. - enables low-duty-cycle power management |
| Package Options | 84-pin PGA (GU84), PLCC (PLG84), Flatpack (FP84), and 100-pin TQFP (PNG100) - all pin-compatible variants |
Pinout & Package
7024S55G is available in 84-pin PGA (GU84), 84-pin PLCC (PLG84), 84-pin Flatpack (FP84), and 100-pin TQFP (PNG100) packages. All variants share identical signal mapping and functional pinout, differing only in mechanical form factor and thermal characteristics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left/Right) | Active-low enable per port; controls power-up of respective port's internal circuitry |
| R/WL / R/WR | Read/Write Control (Left/Right) | Active-low write enable; high = read mode, low = write mode |
| OEL / OER | Output Enable (Left/Right) | Tri-states I/O pins when high; required for read data validity |
| UBL / UBR, LBL / LBR | Upper/Lower Byte Select | Enables 8-bit sub-word access; essential for multiplexed bus compatibility |
| SEML / SEMR | Semaphore Enable | Activates 8-flag semaphore register (addressed by A0–A2) for inter-port synchronization |
| BUSYL / BUSYR | Busy Flag (Input/Output) | When M/S = H: BUSY is output indicating port contention; when M/S = L: BUSY is input for slave coordination |
| INTL / INTR | Interrupt Flag | Open-drain push-pull output signaling semaphore or arbitration event to host controller |
| A0L–A11L / A0R–A11R | Address Inputs | 12-bit address bus per port (4K = 2¹²); supports independent addressing |
| I/O0L–I/O15L / I/O0R–I/O15R | Data I/O Bidirectional | 16-bit parallel data path per port; true dual-port allows simultaneous read/write to same location |
| M/S | Master/Slave Select | Configures BUSY pin function: high = master (output), low = slave (input) |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Enables simultaneous, independent read/write access to any memory location from left and right ports - eliminates external arbitration logic |
| On-Chip Semaphore Logic | Eight hardware semaphore flags (A0–A2 addressable) provide atomic inter-port synchronization without software overhead or external latches |
| Master/Slave Cascading Support | Allows expansion to 32-bit+ data buses using M/S pin to configure BUSY as output (master) or input (slave) - no discrete glue logic needed |
| Full Asynchronous Operation | Each port operates independently with no shared clocks; timing governed solely by CE/R/W/OE setup/hold constraints |
| Battery Backup Data Retention | Supports 2V VCC retention (per IDT7024L spec); 7024S55G retains data during main power loss when backed by coin cell |
Applications
| Digital Signal Processing Systems | Military Avionics Data Buffers |
|---|---|
|
Use Scenario: Real-time FFT processing where one port feeds incoming ADC samples while the other port streams processed results to DAC or FIFO. IC Role / Device Role / Timing Role: Dual-port RAM acts as zero-wait-state ping-pong buffer between two asynchronous clock domains (e.g., ADC sampling clock vs. DSP core clock). Use Value: Eliminates pipeline stalls and external arbitration logic; 55 ns tRC ensures minimal latency between sample capture and computation initiation. |
Use Scenario: Redundant flight control computers exchanging status and command data via shared memory with deterministic conflict resolution. IC Role / Device Role / Timing Role: Acts as fault-tolerant inter-processor communication channel with hardware semaphore-based mutual exclusion. Use Value: On-chip arbitration (tAPS = 5 ns) guarantees priority resolution during simultaneous access; industrial temp range ensures reliability in cockpit environments. |
| Industrial PLC Memory Expansion | Communications Protocol Stack Buffering |
|
Use Scenario: Extending local memory in programmable logic controllers handling multiple I/O modules and motion control loops. IC Role / Device Role / Timing Role: Provides expandable, low-latency scratchpad memory accessible concurrently by CPU and I/O co-processor. Use Value: Separate upper/lower byte enables (UBL/LBL) simplify integration with 8-bit microcontrollers; 84-pin PGA offers robust mechanical mounting for vibration-prone environments. |
Use Scenario: Storing packet headers and payloads in multi-protocol gateways (e.g., Modbus TCP ↔ CAN bridge) requiring concurrent ingress/egress buffering. IC Role / Device Role / Timing Role: Serves as dual-access packet buffer - one port handles Ethernet MAC interface, the other manages CAN controller DMA. Use Value: BUSY flag coordination prevents data corruption during simultaneous packet assembly/disassembly; 5V TTL compatibility simplifies level-shifting design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C024AV-55AXC | 55 ns tRC, 4K × 16, 3.3V core (with 5V I/O tolerance), 100-pin TQFP only | Requires level translation in pure 5V systems; lower active power (120 mW) but no 2V data retention | Select for mixed-voltage designs needing lower power and modern packaging; verify BUSY/SEM timing alignment with host firmware. |
| IDT70V24S55PF | 55 ns tRC, 4K × 16, 3.3V supply, 84-pin PLCC, LVDS-compatible outputs | Not pin-compatible; incompatible voltage domain; lacks 2V retention and M/S-configurable BUSY | Choose only if migrating to 3.3V architecture with LVDS signaling requirements; not a drop-in replacement for 7024S55G. |
Compared with CY7C024AV-55AXC and IDT70V24S55PF, the 7024S55G uniquely supports 5V-only operation with 2V battery backup retention and M/S-selectable BUSY functionality - critical for legacy industrial and military systems requiring direct 5V integration and fail-safe data hold.
Availability
7024S55G is available at Aetrix Electronics and suitable for digital signal processing systems, military avionics data buffers, and industrial PLC memory expansion requiring stable component supply across extended product lifecycles.
Supply support for 7024S55G 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) is a fabless semiconductor company specializing in timing, memory, and interface solutions for communications, computing, and industrial markets before its acquisition by Renesas in 2019.
The IDT7024 family was designed specifically for high-reliability dual-access memory applications in real-time embedded systems - emphasizing deterministic arbitration, low-latency access, and ruggedized packaging for aerospace and defense use cases.
FAQ
What is the maximum operating speed of the 7024S55G?
The 7024S55G has a maximum read cycle time (tRC) of 55 ns, corresponding to a theoretical maximum throughput of approximately 18.2 MHz per port under ideal conditions. This speed applies across the industrial temperature range (–40°C to +85°C) and is guaranteed with 5.0 V ±10% supply and proper signal integrity layout. The '55' in the part number directly denotes this 55 ns rating.
Does the 7024S55G support battery backup for data retention?
Yes - the 7024S55G supports data retention at 2 V VCC, consistent with the IDT7024L specification. While the 'S' suffix indicates standard-power operation, the underlying silicon retains the 2V data hold capability. This enables seamless integration with backup coin-cell circuits during main power failure, preserving critical state information without external nonvolatile memory.
How does the M/S pin affect BUSY flag behavior in the 7024S55G?
When M/S = H (high), the 7024S55G configures as a master: BUSYL/BUSYR become push-pull outputs that assert during port contention. When M/S = L (low), it configures as a slave: BUSYL/BUSYR become inputs, allowing external master devices to control arbitration. This dual-mode operation enables flexible cascading topologies without redesigning PCB layout for different roles.
Which packages are available for the 7024S55G?
The 7024S55G is offered in four industry-standard packages: 84-pin PGA (GU84), 84-pin PLCC (PLG84), 84-pin Flatpack (FP84), and 100-pin TQFP (PNG100). All share identical pin functions and electrical specifications. Mechanical differences include thermal resistance (PGA best for high-power dissipation) and mounting method (PLCC/Flatpack for through-hole, TQFP for surface-mount).
Can the 7024S55G be used in a 32-bit data bus configuration?
Yes - the 7024S55G supports 32-bit expansion via master/slave cascading. Two devices are connected with M/S = H on the master and M/S = L on the slave; BUSY output from master drives BUSY input on slave. This configuration enables full-speed, error-free 32-bit word access without external logic, as confirmed in IDT Application Note AN-124 and the device's functional description.
7024S55G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 84-BPGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 64Kbit
- Memory Organization:
- 4K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 55ns
- Access Time:
- 55 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 84-PGA (27.94x27.94)
7024S55G FAQ
1.How can I place an order for 7024S55G through Aetrix?
Please submit a Request for Quotation (RFQ) for 7024S55G 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 7024S55G reliable?
The price and inventory of 7024S55G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7024S55G is usually 5 days.
3.What payment methods are accepted for 7024S55G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7024S55G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7024S55G?
7024S55G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7024S55G 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 7024S55G?
For technical support, including 7024S55G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7024S55G requirements.
6.How does Aetrix verify that 7024S55G is sourced from the original manufacturer or authorized distributors?
All 7024S55G 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 7024S55G meets industry standards.
7.What is the process for return or replacement of 7024S55G?
All 7024S55G units undergo pre-shipment inspection (PSI). If there is an issue with 7024S55G, 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 7024S55G part is unused and in its original packaging.
Return procedure for 7024S55G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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