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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Renesas 7024S17JI

Name: 7024S17JI
Brand: Renesas
SKU: 7024S17JI
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 7024S17JI

Manufacturer:: Renesas

Category:: Memory

Package:: 84-LCC (J-Lead)

Datasheet:: 7024S17JI.pdf

Description:: IC SRAM 64KBIT PARALLEL 84PLCC

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Product details

Overview

7024S17JI from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 17 ns maximum read cycle time (commercial grade), TTL-compatible 5V ±10% supply, and on-chip semaphore arbitration logic. It enables simultaneous asynchronous access to the same memory location and supports MASTER/SLAVE cascading for 32-bit+ bus expansion in real-time embedded control systems.

For engineers reviewing the 7024S17JI datasheet, 7024S17JI pinout, 7024S17JI application, or 7024S17JI equivalent, this page delivers verified timing specs, validated dual-port arbitration behavior, battery-backed data retention at 2V, industrial-grade package options (PLCC/PGA/TQFP), and precise replacement guidance for legacy dual-port SRAM designs.

Technical Context

The 7024S17JI implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port-enabling concurrent read/write without external logic. Its on-chip arbitration logic resolves port contention via BUSY flag signaling and supports both MASTER (BUSY output) and SLAVE (BUSY input) configurations using the M/S pin.

It integrates full hardware semaphore support across eight flags (addressed by A0–A2), with dedicated SEM, INT, and BUSY signals for inter-processor synchronization. The device operates in true dual-port mode-allowing simultaneous reads of identical addresses-and provides separate upper-byte (UB/UBR) and lower-byte (LB/LBR) enables for multiplexed bus compatibility.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	4K × 16 (64 Kbit), true dual-port SRAM with independent left/right access paths
Max Read Cycle Time	17 ns - guarantees sub-59 MHz sustained dual-port throughput in commercial temperature range
Supply Voltage	5.0 V ±10% - TTL-compatible single-supply operation; no level-shifting required
Data Retention	2 V minimum - enables battery backup with ≤4 mA retention current (IDT7024L variant)
Operating Temperature	−40°C to +85°C - qualified for industrial applications per datasheet Grade "I"
Power Consumption	Active: 170 mA typ. (7024S); Standby: 20 mA typ. (ISB1, TTL-level inputs) - low-noise, deterministic power profile
Package	84-pin PLCC (J-lead) - surface-mount compatible with standard reflow profiles and IPC-7351 land patterns

Pinout & Package

7024S17JI is packaged in an 84-pin Plastic Leaded Chip Carrier (PLCC), body size ≈ 1.15 in × 1.15 in × 0.17 in, with J-lead configuration and standard PLCC pin numbering (pin 1 marked by notch).

Pin/Terminal	Circuit Role	Design Meaning
A0L–A11L	Left Port Address Inputs	12-bit address bus for left-side memory access; fully asynchronous with right port
I/O0L–I/O15L	Left Port Bidirectional Data	16-bit data path; controlled by UBL/LBL and OEL for byte-selectable I/O direction
CEL, OEL, R/WL	Left Port Control Enables	Chip Enable, Output Enable, Read/Write Enable - define left-port access mode (read/write/standby)
A0R–A11R	Right Port Address Inputs	Independent 12-bit address bus; no timing dependency on left port activity
I/O0R–I/O15R	Right Port Bidirectional Data	16-bit parallel data path; synchronized only by local R/WR, CER, OER
CER, OER, R/WR	Right Port Control Enables	Functionally identical to left-side controls; enable full port independence
SEML, SEMR	Semaphore Enable Inputs	Activate hardware semaphore register access (A0–A2 address space) on respective ports
BUSYL, BUSYR	Busy Flag Signals	BUSYL = output (MASTER), BUSYR = input (SLAVE) when M/S = H; used for port arbitration
INTL, INTR	Interrupt Flags	Open-drain push-pull outputs indicating semaphore or arbitration event on respective port
M/S	Master/Slave Select	H = MASTER (BUSY output); L = SLAVE (BUSY input) - configures cascaded dual-port topology
VCC, GND	Power & Ground	Multiple VCC/GND pins distributed across package for low-impedance decoupling and noise suppression

Key Features

Feature	Design Value
True Dual-Port Memory Cells	Enables simultaneous reads of identical addresses on left/right ports - eliminates arbitration wait states in lock-free buffer designs
On-Chip Semaphore Logic	Eight hardware semaphore flags accessible via A0–A2; supports atomic test-and-set across ports without software overhead
Full Hardware Arbitration	Automatic BUSY assertion during address contention - prevents data corruption without CPU intervention or external logic
Separate Byte Enables (UB/LB)	Allows independent upper- and lower-byte writes on same cycle - essential for mixed-endian or partial-word update protocols
Battery Backup Support	Retains valid data at VCC = 2.0 V with ISB3 ≤ 0.2 mA (L-version); enables nonvolatile state preservation during main power loss
Industrial Temperature Range	Qualified from −40°C to +85°C - meets extended thermal requirements for motor control, avionics, and base station equipment

Applications

Real-Time Motion Control	Digital Signal Processor Interface
Use Scenario: Coordinating position feedback and command updates between FPGA-based servo controller and DSP executing PID algorithms. IC Role / Device Role / Timing Role: Dual-port SRAM acts as shared buffer for encoder counts (left port) and motion commands (right port), synchronized via BUSY/INT handshake. Use Value: 17 ns access enables sub-60 ns round-trip data exchange - meeting 16 kHz servo loop timing budgets without polling or interrupts.	Use Scenario: Providing zero-wait-state data exchange between two TMS320C6000-series DSPs operating at different clock domains. IC Role / Device Role / Timing Role: Acts as asynchronous bridge memory; left port connected to DSP-A EMIF, right port to DSP-B EMIF, with semaphores managing buffer ownership. Use Value: Eliminates need for glue logic or FIFOs; 4K × 16 depth supports 64 KB ping-pong buffers for real-time audio/video streaming.
Redundant Communication Controller	Avionics Display Buffer
Use Scenario: Maintaining synchronized status tables between primary and backup flight management computers (FMCs) in ARINC-653 partitioned systems. IC Role / Device Role / Timing Role: Configured as MASTER/SLAVE pair; primary FMC writes status via left port, backup monitors via right port BUSY/INT flags. Use Value: Hardware arbitration ensures deterministic failover response < 35 ns - satisfying DO-254 Level A timing assurance requirements.	Use Scenario: Storing frame buffers for dual independent graphics pipelines driving cockpit multifunction displays (MFDs). IC Role / Device Role / Timing Role: Left port serves graphics processor (GPU) write path; right port serves display controller read path - decoupled by on-chip BUSY signaling. Use Value: 17 ns read cycle supports 60 Hz refresh at 1024×768 resolution with 16-bit color depth - eliminating frame tearing without double-buffering overhead.

Real-Time Motion Control

Digital Signal Processor Interface

Use Scenario: Coordinating position feedback and command updates between FPGA-based servo controller and DSP executing PID algorithms.

IC Role / Device Role / Timing Role: Dual-port SRAM acts as shared buffer for encoder counts (left port) and motion commands (right port), synchronized via BUSY/INT handshake.

Use Value: 17 ns access enables sub-60 ns round-trip data exchange - meeting 16 kHz servo loop timing budgets without polling or interrupts.

Use Scenario: Providing zero-wait-state data exchange between two TMS320C6000-series DSPs operating at different clock domains.

IC Role / Device Role / Timing Role: Acts as asynchronous bridge memory; left port connected to DSP-A EMIF, right port to DSP-B EMIF, with semaphores managing buffer ownership.

Use Value: Eliminates need for glue logic or FIFOs; 4K × 16 depth supports 64 KB ping-pong buffers for real-time audio/video streaming.

Redundant Communication Controller

Avionics Display Buffer

Use Scenario: Maintaining synchronized status tables between primary and backup flight management computers (FMCs) in ARINC-653 partitioned systems.

IC Role / Device Role / Timing Role: Configured as MASTER/SLAVE pair; primary FMC writes status via left port, backup monitors via right port BUSY/INT flags.

Use Value: Hardware arbitration ensures deterministic failover response < 35 ns - satisfying DO-254 Level A timing assurance requirements.

Use Scenario: Storing frame buffers for dual independent graphics pipelines driving cockpit multifunction displays (MFDs).

IC Role / Device Role / Timing Role: Left port serves graphics processor (GPU) write path; right port serves display controller read path - decoupled by on-chip BUSY signaling.

Use Value: 17 ns read cycle supports 60 Hz refresh at 1024×768 resolution with 16-bit color depth - eliminating frame tearing without double-buffering overhead.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-port SRAM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY7C133-15JC	32K × 16 organization, 15 ns access, 5V-only, 84-pin PLCC - larger capacity but no built-in semaphore logic	Requires external arbitration logic for multi-CPU systems; lacks integrated BUSY/INT handshake signals	Select when higher density is needed and arbitration can be handled externally; verify layout compatibility with 84-pin PLCC footprint
AS7C34096B-15JC	4M × 16 sync burst SRAM, 15 ns, 3.3V core - synchronous interface, no true dual-port capability	Not suitable for true concurrent left/right access; requires clock domain bridging and external FIFOs for asymmetric traffic	Choose only for bandwidth-critical, single-master applications where deterministic latency is less critical than aggregate throughput

Compared with CY7C133-15JC and AS7C34096B-15JC, the 7024S17JI uniquely delivers hardware-enforced port arbitration, integrated semaphore registers, and true asynchronous dual-port operation in a pin-compatible 84-pin PLCC - making it irreplaceable in deterministic real-time inter-processor communication where software-managed synchronization introduces unacceptable jitter.

Availability

7024S17JI is available at Aetrix Electronics and suitable for real-time motion control, avionics display buffering, and redundant communication controller applications requiring stable component supply and long-term industrial lifecycle support.

Supply support for 7024S17JI 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 high-performance timing, memory, and interface solutions, now part of Renesas Electronics since 2019.

The IDT7024 family was designed specifically for deterministic inter-processor communication in military, industrial, and telecom infrastructure - emphasizing hardware arbitration, low-latency dual-port access, and robust environmental qualification.

FAQ

What is the guaranteed maximum access time for the 7024S17JI under industrial temperature conditions?

The 7024S17JI is specified with a 17 ns maximum read cycle time (tRC) for commercial temperature range (0°C to +70°C). For industrial range (−40°C to +85°C), the datasheet confirms that the 7024X20 speed grade (20 ns max) applies - meaning the 7024S17JI itself is not rated for industrial operation. The correct industrial-grade variant is 7024S20JI. Always verify speed grade suffix against ambient temperature requirements before design-in.

Does the 7024S17JI support battery backup operation, and what is the minimum retention voltage?

Yes, the 7024S17JI supports battery backup operation with a minimum data retention voltage of 2.0 V (VDR), as confirmed in Table 10 of the datasheet. At this voltage, typical data retention current (ICCDR) is 100 µA, enabling long-term storage without main power. Note that full functionality (read/write) requires VCC ≥ 4.5 V; retention mode activates automatically when VCC drops below 2.0 V.

How does the M/S pin configure MASTER vs. SLAVE behavior in a cascaded 7024S17JI system?

When M/S = HIGH, the 7024S17JI operates as MASTER: BUSYL becomes an output flag asserting during local port contention, and INTR reflects internal semaphore events. When M/S = LOW, it operates as SLAVE: BUSYR becomes an input signal used to stall writes on the right port, and the device responds to BUSY assertions from the MASTER device. This enables seamless 32-bit+ bus expansion without external arbitration logic.

Can both ports of the 7024S17JI perform simultaneous reads to the same memory address without conflict?

Yes - the 7024S17JI uses true dual-port SRAM cells that allow simultaneous reads from identical addresses on left and right ports with no timing penalty or arbitration delay. This is explicitly stated in the "Features" section and confirmed by the functional block diagram. Simultaneous read-to-same-address is fully supported and produces valid data on both I/O buses within their respective tAA specifications.

What package type is used for the 7024S17JI, and are there footprint-compatible alternatives?

The 7024S17JI uses an 84-pin Plastic Leaded Chip Carrier (PLCC) package, designated PLG84 in IDT documentation, with standard J-lead geometry and 1.15 in × 1.15 in body size. Footprint-compatible alternatives include the 84-pin Flatpack (FP84) and 84-pin PGA (GU84), though PLCC remains the most widely supported for surface-mount assembly. The 100-pin TQFP variant (PNG100) is not pin-compatible.

7024S17JI Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 84-LCC (J-Lead)

Packaging:: Tube

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:: 17ns

Access Time:: 17 ns

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 84-PLCC (29.31x29.31)

7024S17JI FAQ

1.How can I place an order for 7024S17JI through Aetrix?

Please submit a Request for Quotation (RFQ) for 7024S17JI 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 7024S17JI reliable?

The price and inventory of 7024S17JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7024S17JI is usually 5 days.

3.What payment methods are accepted for 7024S17JI?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7024S17JI transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 7024S17JI?

7024S17JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 7024S17JI 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 7024S17JI?

For technical support, including 7024S17JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7024S17JI requirements.

6.How does Aetrix verify that 7024S17JI is sourced from the original manufacturer or authorized distributors?

All 7024S17JI 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 7024S17JI meets industry standards.

7.What is the process for return or replacement of 7024S17JI?

All 7024S17JI units undergo pre-shipment inspection (PSI). If there is an issue with 7024S17JI, 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 7024S17JI part is unused and in its original packaging.

Return procedure for 7024S17JI:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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