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Renesas 7006S55J
- Part No.:
- 7006S55J
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7006S55J.pdf
- Description:
- IC SRAM 128KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,383
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Product details
Overview
7006S55J from IDT is a high-speed 16K × 8 (131,072-bit) true dual-port static RAM with independent left/right ports, 55 ns maximum read cycle time, 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 16-bit+ data bus expansion in real-time inter-processor communication systems.
For engineers reviewing the 7006S55J datasheet, 7006S55J pinout, 7006S55J application, or 7006S55J equivalent, this device is selected for deterministic port arbitration, battery-backed data retention down to 2V, and industrial-grade operation from –40°C to +85°C in embedded control, avionics data buffers, and dual-CPU shared-memory architectures.
Technical Context
The 7006S55J implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, enabling concurrent reads/writes without external logic. Its on-chip arbitration logic resolves contention via BUSY flag assertion and supports semaphore signaling across ports using dedicated SEM/INT pins.
It features two independent chip-enable (CEL/CER), read/write (R/WL/R/WR), and output-enable (OEL/OER) controls, plus M/S pin for master/slave configuration. The device operates in commercial, industrial, and military temperature grades, with the 'S' suffix denoting standard-power variant and '55' specifying 55 ns speed grade.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 16K × 8 (131,072 bits), true dual-port SRAM with independent left/right address/data/control paths |
| Access Time (tRC) | 55 ns max - defines minimum read cycle interval for guaranteed timing compliance at full speed |
| Supply Voltage | 5.0 V ±10% - single TTL-compatible rail; all I/Os and controls operate at this voltage |
| Operating Temperature | –40°C to +85°C - industrial grade rating confirmed for 7006S55J in official IDT documentation |
| Power Consumption | Active: 150 mA typ (both ports active); Standby: 13 mA typ (TTL-level inputs, f = fMAX) |
| Data Retention | 2 V minimum - retains data during brownout or backup-battery operation without refresh |
| Package | 64-pin TQFP (PNG64) - 14 mm × 14 mm body, surface-mount, RoHS-compliant footprint |
Pinout & Package
7006S55J is packaged in a 64-pin thin quad flatpack (TQFP), designated PNG64, with 0.5 mm pitch, 14 mm × 14 mm body size, and 1.4 mm height. All VCC and GND pins must be connected per layout guidelines; no thermal pad is specified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A13L | Left-port address inputs | 14-bit address bus for left port; decodes 16K locations independently of right port |
| A0R–A13R | Right-port address inputs | 14-bit address bus for right port; non-mirrored and electrically isolated from left port |
| I/O0L–I/O7L | Left-port bidirectional data | 8-bit data path; tri-stated when OEL = VIH or CEL = VIH |
| I/O0R–I/O7R | Right-port bidirectional data | 8-bit data path; tri-stated when OER = VIH or CER = VIH |
| CEL / CER | Chip enable (left/right) | Active-low enables port logic; deassertion places port in low-power standby mode |
| R/WL / R/WR | Read/write control (left/right) | Active-low write enable; high = read (when OE active) or high-Z (when OE inactive) |
| OEL / OER | Output enable (left/right) | Active-low enables data outputs; required for read operations; does not affect writes |
| SEML / SEMR | Semaphore enable (left/right) | Active-low selects semaphore register access instead of memory array; enables inter-port signaling |
| INTL / INTR | Interrupt flag (left/right) | Open-drain output; asserted low to signal event (e.g., semaphore acquisition or write completion) |
| BUSYL / BUSYR | Busy flag (left/right) | Push-pull output (M/S = H) or input (M/S = L); indicates port contention or arbitration state |
| M/S | Master/slave select | High = BUSY output (master); Low = BUSY input (slave); configures cascaded multi-device systems |
| VCC | Power supply | 5.0 V ±10% main supply; multiple pins require parallel connection for low-impedance routing |
| GND | Ground | Signal and power ground; multiple pins require low-inductance star grounding |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port memory cells | Enables simultaneous read access to identical memory addresses from both ports without conflict or delay |
| On-chip semaphore logic | Eight hardware semaphore flags accessible via A0–A2 and I/O0–I/O7, eliminating need for external locking logic |
| Automatic power-down control | CE-driven standby mode reduces current to 13 mA typ (ISB1), critical for power-constrained embedded systems |
| Full port arbitration | Deterministic BUSY flag generation and priority resolution prevent race conditions during concurrent access |
| Battery backup capability | Retains valid data at VCC = 2.0 V, supporting seamless transition to backup power during main supply loss |
Applications
| Real-Time Inter-Processor Communication | Avionics Data Buffering |
|---|---|
|
Use Scenario: Two independent CPUs exchange status, telemetry, and command data through shared memory without software locks or polling overhead. IC Role / Device Role / Timing Role: Dual-port SRAM acts as deterministic, low-latency shared memory buffer with hardware-enforced mutual exclusion via semaphores. Use Value: Eliminates CPU stalls and software arbitration delays; 55 ns access ensures sub-100 ns round-trip data handoff between processors. |
Use Scenario: Flight control computer and sensor acquisition unit share sensor fusion results and actuator commands in safety-critical airborne systems. IC Role / Device Role / Timing Role: Provides radiation-tolerant, temperature-stable shared memory with BUSY-flag arbitration for fault-isolated dual-channel architectures. Use Value: Industrial temperature range (–40°C to +85°C) and 2V data retention ensure continuous operation during power transients and extreme environmental conditions. |
| Industrial PLC Memory Expansion | Digital Signal Processor Co-Processing |
|
Use Scenario: Programmable logic controller uses dual-core architecture where one core handles I/O scanning and the other runs motion control algorithms. IC Role / Device Role / Timing Role: Serves as synchronized scratchpad memory between cores, with semaphore signaling coordinating task handoffs and buffer management. Use Value: Master/slave cascading (via M/S pin) allows 16-bit word expansion without external glue logic, reducing BOM count and PCB area. |
Use Scenario: DSP offloads FFT computation while host microcontroller manages user interface and system control in audio or radar processing systems. IC Role / Device Role / Timing Role: Acts as zero-wait-state data exchange buffer, enabling pipelined transfer of time-domain samples and frequency-domain results. Use Value: Asynchronous operation permits independent clock domains; 55 ns tRC supports >18 MHz sustained throughput per port. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C136-55JC | 55 ns access, 16K × 8, but uses 3.3 V core with 5 V tolerant I/O; different pinout and no native M/S cascade support | Requires level-shifting for 5 V-only systems; lacks integrated BUSY arbitration logic - external logic needed for master/slave coordination | Select only if migrating to mixed-voltage design and willing to add discrete arbitration circuitry. |
| IDT70V27L25PF | Lower power (25 ns, 3.3 V), 32K × 8, but lacks BUSY/SEM/INT dedicated pins; relies on software semaphore emulation | Not suitable for hard real-time deterministic arbitration; requires firmware overhead and increases latency unpredictability | Choose only for cost-sensitive, non-safety-critical applications where software-managed sharing is acceptable. |
Compared with CY7C136-55JC and IDT70V27L25PF, the 7006S55J delivers hardware-enforced port arbitration, native 5 V operation, and seamless master/slave cascading - making it uniquely suited for deterministic, low-latency shared-memory systems requiring zero-software arbitration overhead.
Availability
7006S55J is available at Aetrix Electronics and suitable for real-time inter-processor communication, avionics data buffering, and industrial PLC memory expansion requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.
Supply support for 7006S55J 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 semiconductor company specializing in timing, memory interface, RF, and sensor solutions, now part of Renesas Electronics since 2019.
The 7006S55J belongs to IDT's legacy dual-port SRAM product line, designed specifically for deterministic, low-latency shared-memory architectures in embedded control, defense, and industrial automation systems.
FAQ
What is the operating temperature range certified for the 7006S55J?
7006S55J is rated for industrial temperature operation from –40°C to +85°C. This specification is explicitly confirmed in the IDT datasheet section "Maximum Operating Temperature and Supply Voltage" and applies to the 'S' speed grade with 55 ns timing. It is not rated for military-grade –55°C to +125°C operation.
Does the 7006S55J support battery backup data retention, and at what voltage?
Yes, the 7006S55J supports battery backup data retention down to 2.0 V (VDR = 2.0 V), as specified in the "Data Retention Characteristics" table. This allows uninterrupted memory retention during main supply brownouts or transitions to auxiliary power, with typical retention current of 100 µA at 2 V.
How does the M/S pin configure master versus slave operation in the 7006S55J?
When M/S = VIH (high), the 7006S55J operates as a master: BUSYL and BUSYR become push-pull outputs asserting busy status during contention. When M/S = VIL (low), it operates as a slave: BUSYL and BUSYR become inputs accepting busy signals from a master device, enabling daisy-chained arbitration in multi-chip systems.
Can the 7006S55J perform simultaneous reads from both ports to the same memory address?
Yes, the 7006S55J features true dual-port memory cells that allow simultaneous reads from both left and right ports to the exact same memory address without conflict, delay, or data corruption - a core architectural feature confirmed in the "Features" section and functional block diagram.
What package type is used for the 7006S55J, and are there alternate package options for this speed grade?
7006S55J is supplied in a 64-pin thin quad flatpack (TQFP), package code PNG64. While the IDT7006 family offers PGA, PLCC, and flatpack variants, the 55 ns speed grade (7006S55J) is documented exclusively in the PNG64 TQFP package per IDT's ordering information and pin configuration diagrams.
7006S55J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 68-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 128Kbit
- Memory Organization:
- 16K x 8
- 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:
- Surface Mount
- Supplier Device Package:
- 68-PLCC (24.21x24.21)
7006S55J FAQ
1.How can I place an order for 7006S55J through Aetrix?
Please submit a Request for Quotation (RFQ) for 7006S55J 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 7006S55J reliable?
The price and inventory of 7006S55J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7006S55J is usually 5 days.
3.What payment methods are accepted for 7006S55J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7006S55J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7006S55J?
7006S55J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7006S55J 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 7006S55J?
For technical support, including 7006S55J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7006S55J requirements.
6.How does Aetrix verify that 7006S55J is sourced from the original manufacturer or authorized distributors?
All 7006S55J 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 7006S55J meets industry standards.
7.What is the process for return or replacement of 7006S55J?
All 7006S55J units undergo pre-shipment inspection (PSI). If there is an issue with 7006S55J, 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 7006S55J part is unused and in its original packaging.
Return procedure for 7006S55J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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