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Renesas 7143LA20JG8
- Part No.:
- 7143LA20JG8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7143LA20JG8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,637
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Product details
Overview
7143LA20JG8 from IDT is a low-power, 2K × 16-bit (32 Kbit), dual-port static RAM with independent left/right asynchronous ports, 20 ns max read cycle time, TTL-compatible 5V ±10% operation, and battery backup data retention down to 2V - used in real-time embedded systems requiring concurrent CPU/DSP memory access without arbitration logic.
For engineers reviewing the 7143LA20JG8 datasheet, 7143LA20JG8 pinout, 7143LA20JG8 application, or 7143LA20JG8 equivalent, this page delivers verified timing specs, master/slave BUSY interface behavior, byte-level write control, industrial temperature support (–40°C to +85°C), and exact package mapping for PLCC-68 (JG8).
Technical Context
The 7143LA20JG8 operates as a SLAVE dual-port SRAM in MASTER/SLAVE configurations: BUSY is an input (not output), enabling write inhibition during contention when paired with IDT7133 MASTER devices. It supports fully asynchronous, independent read/write on both ports with separate CE, R/W, OE, and address buses.
It implements per-byte upper/lower write enable (R/WLUB/R/WLLB and R/WRUB/R/WRLB), open-drain BUSY input synchronization, and automatic power-down via chip enable - delivering 1 mW typical standby power and 200 µW typical 2V battery-retention current per port.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16-bit (32 Kbit) - supports 16-bit parallel data paths on both ports simultaneously |
| Access Time (tRC) | 20 ns max - enables direct interfacing with 50 MHz bus systems without wait states |
| Supply Voltage | 5.0 V ±10% - compatible with standard TTL logic families and legacy 5V embedded platforms |
| Standby Current | 1 µA typ. - enables ultra-low-power hold mode during system sleep or battery backup |
| Data Retention | 2 V minimum - retains memory contents during brown-out or backup battery operation |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade embedded control and communications equipment |
| I/O Voltage Levels | TTL-compatible inputs (VIH = 2.2 V min, VIL = 0.8 V max); outputs drive 4 mA low / –4 mA high |
Pinout & Package
7143LA20JG8 is packaged in a 68-pin Plastic Leaded Chip Carrier (PLCC), designated JG8 per IDT ordering nomenclature. The package is leaded, surface-mountable, and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A10L | Left Port Address Inputs | 11-bit address bus for left-side memory access (2K = 211) |
| A0R–A10R | Right Port Address Inputs | Independent 11-bit address bus for right-side access |
| I/O0L–I/O15L | Left Port Bidirectional Data | 16-bit data path; direction controlled by R/WLUB/R/WLLB and OEL |
| I/O0R–I/O15R | Right Port Bidirectional Data | 16-bit data path; direction controlled by R/WRUB/R/WRLB and OER |
| CEL / CER | Chip Enable (Left / Right) | Active-low enables respective port; controls power-down entry/exit |
| R/WLUB / R/WLLB | Left Upper/Lower Byte Write Enable | Independent byte-level write control - enables partial writes without masking logic |
| R/WRUB / R/WRLB | Right Upper/Lower Byte Write Enable | Enables selective 8-bit writes on right port - critical for mixed-data-size protocols |
| OEL / OER | Output Enable (Left / Right) | Tri-states I/O pins independently - allows shared bus architectures |
| BUSYL / BUSYR | BUSY Input (Left / Right) | SLAVE-only function: active-low write inhibit signal from MASTER device |
| VCC (×2) | Power Supply | Both pins must be connected to 5V ±10%; ensures stable core and I/O voltage distribution |
| GND (×2) | Ground | Both pins must be connected to system ground - minimizes noise coupling and ensures timing integrity |
Key Features
| Feature | Design Value |
|---|---|
| SLAVE-only BUSY input interface | Eliminates need for external arbitration logic when expanding to 32+ bit data widths with IDT7133 MASTER |
| Byte-selectable write control | Reduces external glue logic by enabling independent upper/lower byte writes per port |
| 2V data retention | Supports seamless transition to battery backup during main supply failure - no data loss at ≤2V |
| Industrial temperature range | Validated operation from –40°C to +85°C - suitable for motor drives, base stations, and factory automation |
| Low-power LA variant | 1 mW typical standby vs. 5 mW in SA version - extends battery life in always-on monitoring systems |
Applications
| Real-Time DSP Memory Buffer | Dual-CPU Shared Memory System |
|---|---|
Use Scenario: Two independent processors (e.g., ARM + DSP) concurrently access shared instruction/data buffers without software locks. IC Role / Device Role / Timing Role: SLAVE dual-port SRAM providing synchronized, contention-free memory access via hardware BUSY arbitration with IDT7133 MASTER. Use Value: Eliminates CPU stalling and software semaphore overhead - guarantees deterministic <20 ns read latency under full load. |
Use Scenario: Industrial PLC with host CPU and motion controller sharing configuration tables and status registers. IC Role / Device Role / Timing Role: Asynchronous memory bridge enabling simultaneous read (host) and write (controller) operations at full speed. Use Value: Enables sub-millisecond I/O update cycles - critical for closed-loop servo response in CNC and robotics. |
| Telecom Line Card Buffer | Battery-Backed Data Logger |
Use Scenario: TDM switch fabric buffering voice/data packets between line interface and switching matrix. IC Role / Device Role / Timing Role: Dual-port RAM acting as ping-pong buffer - one port receives packet data while the other feeds the switch core. Use Value: Sustains 50 MHz sustained throughput with zero packet loss - validated by 20 ns tRC and 12 ns tAOE. |
Use Scenario: Environmental sensor node logging temperature/pressure at 1 Hz with 10-year battery life. IC Role / Device Role / Timing Role: Low-power SLAVE SRAM retaining 32 Kbit of historical data during main power outage. Use Value: Draws only 1 µA in full standby - extends CR2032 battery life beyond 10 years with periodic wake-up writes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 7143LA25JG8 | 25 ns max access time vs. 20 ns; otherwise identical pinout, features, and voltage specs | Suitable where 40 MHz bus timing margin allows relaxed cycle time | Select when cost sensitivity outweighs 5 ns performance gain and thermal/power budget permits same LA power profile |
| CY7C133-25JC | 25 ns access; Cypress part uses different BUSY logic (bidirectional), no native MASTER/SLAVE pairing | Requires external arbitration for multi-chip width expansion; no guaranteed BUSY propagation delay matching | Choose only if existing design uses CY7C133 footprint and timing analysis confirms compatibility with 7143LA20JG8's 20 ns window |
Compared with 7143LA25JG8 and CY7C133-25JC, the 7143LA20JG8 delivers the fastest guaranteed access (20 ns), native SLAVE BUSY input timing alignment for IDT MASTER/SLAVE systems, and lowest standby power - making it optimal for latency-critical industrial and telecom designs.
Availability
7143LA20JG8 is available at Aetrix Electronics and suitable for real-time DSP memory buffers, dual-CPU shared memory systems, telecom line card buffers, and battery-backed data loggers requiring stable component supply across extended production lifecycles.
Supply support for 7143LA20JG8 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 memory, timing, and interface solutions - acquired by Renesas Electronics in 2019.
The 7143LA20JG8 belongs to IDT's legacy dual-port SRAM product line, engineered specifically for deterministic, contention-free memory sharing between heterogeneous processors in industrial, military, and telecom infrastructure.
FAQ
What is the role of BUSY pins on the 7143LA20JG8?
The BUSY pins (BUSYL and BUSYR) on the 7143LA20JG8 function exclusively as inputs - unlike the IDT7133 MASTER, which drives BUSY as an open-drain output. When asserted low by a connected IDT7133 MASTER, they inhibit write operations on the corresponding port. This SLAVE-only behavior eliminates arbitration conflicts in width-expanded systems and requires external pull-up resistors only on the MASTER side.
Does the 7143LA20JG8 support true simultaneous read/write across ports?
Yes, the 7143LA20JG8 supports fully asynchronous, independent read and write operations on left and right ports - provided addresses do not collide. When both ports access the same memory location concurrently, the BUSY input mechanism (driven by a MASTER IDT7133) stalls the later write attempt. No internal arbitration logic exists within the 7143LA20JG8 itself - it relies entirely on external BUSY signaling for conflict resolution.
What is the significance of the 'LA' suffix in 7143LA20JG8?
The 'LA' in 7143LA20JG8 denotes the low-power variant: it draws 1 mW typical standby current (vs. 5 mW for SA versions) and supports 2V data retention - enabling battery backup operation. This is achieved via optimized CMOS process and dynamic power gating controlled by CE. The '20' indicates 20 ns maximum read cycle time, and 'JG8' specifies the 68-pin PLCC package.
Can the 7143LA20JG8 operate without a MASTER IDT7133?
Yes - the 7143LA20JG8 functions as a standalone dual-port SRAM without a MASTER. In that mode, BUSYL and BUSYR must be tied HIGH (via pull-ups) to disable write inhibition. All other control signals (CE, R/W, OE) operate normally. However, hardware contention detection and resolution require either external logic or acceptance of potential data corruption during simultaneous writes to the same address.
What are the PCB layout requirements for the dual VCC and GND pins on 7143LA20JG8?
Both VCC pins (pins 17 and 44) and both GND pins (pins 35 and 61) on the 7143LA20JG8 must be individually connected to the respective power planes using short, low-inductance traces. Splitting supply current across two VCC pins reduces IR drop and improves noise immunity; dual GND connections minimize ground bounce during high-speed I/O transitions - essential to meet 20 ns timing margins and prevent setup/hold violations.
7143LA20JG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 68-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 32Kbit
- Memory Organization:
- 2K 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:
- 68-PLCC (24.21x24.21)
7143LA20JG8 FAQ
1.How can I place an order for 7143LA20JG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7143LA20JG8 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 7143LA20JG8 reliable?
The price and inventory of 7143LA20JG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7143LA20JG8 is usually 5 days.
3.What payment methods are accepted for 7143LA20JG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7143LA20JG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7143LA20JG8?
7143LA20JG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7143LA20JG8 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 7143LA20JG8?
For technical support, including 7143LA20JG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7143LA20JG8 requirements.
6.How does Aetrix verify that 7143LA20JG8 is sourced from the original manufacturer or authorized distributors?
All 7143LA20JG8 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 7143LA20JG8 meets industry standards.
7.What is the process for return or replacement of 7143LA20JG8?
All 7143LA20JG8 units undergo pre-shipment inspection (PSI). If there is an issue with 7143LA20JG8, 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 7143LA20JG8 part is unused and in its original packaging.
Return procedure for 7143LA20JG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7143LA20JG8 Tags
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