My Inquiry
My Account
Renesas 7143SA20G
- Part No.:
- 7143SA20G
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-BPGA
- Datasheet:
-
7143SA20G.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,320
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
7143SA20G from IDT is a high-speed 2K × 16 dual-port SRAM configured as a SLAVE device in MASTER/SLAVE memory expansion systems, supporting independent asynchronous access on left and right ports with 20 ns read cycle time (commercial grade), TTL-compatible 5V ±10% operation, and battery backup data retention down to 2V. It enables error-free 32-bit-or-wider word width systems without external logic.
For engineers reviewing the 7143SA20G datasheet, 7143SA20G pinout, 7143SA20G application, or 7143SA20G equivalent, this page delivers verified timing parameters (tRC = 20 ns, tAA = 20 ns), BUSY input behavior, byte-select write control, power consumption (ISB1 = 25 mA typ.), and package-specific pin validation for 68-pin PLCC, PGA, and flatpack - all critical for real-time embedded memory arbitration design.
Technical Context
The 7143SA20G operates as a SLAVE dual-port RAM with BUSY pin functioning exclusively as a write-inhibit input - unlike the MASTER IDT7133 where BUSY is an open-drain output requiring pull-up. It supports fully asynchronous, independent read/write operations on both ports with separate address, control, and I/O buses.
Its arbitration logic is disabled; contention resolution relies entirely on the MASTER's BUSY signal. The device implements per-byte write enable (R/WLUB/R/WLLB and R/WRUB/R/WRLB), enabling precise 8-bit granularity writes on each port, and features automatic power-down via CE-controlled standby modes with ISB3 = 1.0 mA (typ.) under CMOS-level inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits (32,768 bits total); supports independent 16-bit parallel access per port |
| Read Cycle Time (tRC) | 20 ns max (commercial grade); defines minimum interval between successive reads on same port |
| Address Access Time (tAA) | 20 ns max; determines latency from stable address to valid data output |
| Chip Enable Access (tACE) | 20 ns max; critical for CE-gated system timing margins in multi-chip configurations |
| Standby Current (ISB1) | 25 mA typical (both ports CE = VIH); key for low-power idle states in always-on subsystems |
| Data Retention Voltage | 2.0 V minimum (LA variant only); not applicable to 7143SA20G (SA = standard power, no retention) |
| Supply Voltage | 5.0 V ±10% (4.5–5.5 V); single-rail TTL-compatible operation eliminates level-shifting needs |
Pinout & Package
7143SA20G is available in 68-pin PLCC (PLG68), 68-pin ceramic PGA (GU68), and 68-pin flatpack (FP68) packages. All variants share identical pinout and function mapping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A10L | Left Port Address Inputs | 11-bit address bus for left port (2K = 211 locations) |
| A0R–A10R | Right Port Address Inputs | Independent 11-bit address bus for right port |
| I/O0L–I/O15L | Left Port Bidirectional Data | 16-bit data path; high-impedance when OEL = VIH or CE = VIH |
| I/O0R–I/O15R | Right Port Bidirectional Data | 16-bit data path; isolated from left port I/O lines |
| CEL / CER | Chip Enable (Left / Right) | Active-low enables respective port; disables I/O drivers and reduces current draw |
| R/WLUB / R/WLLB | Left Port Upper/Lower Byte Write Enable | Independent 8-bit write control: R/WLUB = I/O8L–I/O15L, R/WLLB = I/O0L–I/O7L |
| R/WRUB / R/WRLB | Right Port Upper/Lower Byte Write Enable | Same byte-granularity control for right port I/O8R–I/O15R and I/O0R–I/O7R |
| OEL / OER | Output Enable (Left / Right) | Active-low enables output drivers; overrides R/W state during reads |
| BUSYL / BUSYR | Busy Input (Left / Right) | SLAVE-only function: asserted HIGH by MASTER to inhibit writes on corresponding port |
| VCC (×2) | Power Supply | Both pins must be connected to 5V ±10%; ensures reliable internal logic and I/O drive |
| GND (×2) | Ground Reference | Both pins must be connected to system ground; minimizes noise coupling and timing skew |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent asynchronous ports | Enables concurrent CPU/DSP access to shared memory without software arbitration overhead |
| Byte-selectable write control | Permits partial-word updates (e.g., 8-bit register writes) without read-modify-write cycles |
| MASTER/SLAVE architecture support | Eliminates "busy lock-out" in 32+ bit systems by centralizing arbitration in one MASTER (IDT7133) |
| TTL-compatible 5V interface | Direct connection to legacy microcontrollers and FPGAs without level translation circuitry |
| Low-power standby modes | ISB1 = 25 mA (typ.) with CE = VIH allows rapid wake-up while minimizing idle power |
| Industrial temperature range option | Available in –40°C to +85°C (though 7143SA20G is commercial-grade: 0°C to +70°C) |
Applications
| Real-Time Digital Signal Processing | Redundant Control Systems |
|---|---|
Use Scenario: Two DSP cores simultaneously accessing shared coefficient tables and FIFO buffers in radar beamforming. IC Role / Device Role / Timing Role: SLAVE dual-port RAM provides synchronized, contention-free memory access under MASTER arbitration, enabling deterministic 20 ns read latency. Use Value: Eliminates software semaphore delays and guarantees atomic 16-bit transfers between processing units. |
Use Scenario: Dual-lockstep microcontrollers monitoring safety-critical vehicle subsystems (e.g., braking, steering). IC Role / Device Role / Timing Role: Acts as fault-detection shared memory where MASTER compares outputs and asserts BUSY to SLAVE on mismatch. Use Value: Hardware-enforced write inhibition prevents inconsistent state propagation during failover events. |
| High-Speed Data Acquisition | Legacy Bus Interface Bridge |
Use Scenario: FPGA-based digitizer capturing 100+ MSPS ADC streams into ping-pong buffers. IC Role / Device Role / Timing Role: Left port accepts streaming data; right port feeds processed frames to host processor - both at full 20 ns timing. Use Value: Asynchronous dual-port operation avoids FIFO bottlenecks and enables zero-latency buffer switching. |
Use Scenario: Bridging ISA or VME bus masters to modern controller subsystems with shared configuration registers. IC Role / Device Role / Timing Role: Provides transparent, cycle-accurate memory-mapped register space accessible by both legacy and new controllers. Use Value: Enables hardware-level protocol translation without CPU intervention or DMA 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 |
|---|---|---|---|
| IDT7133SA20G | MASTER device with on-chip arbitration logic and open-drain BUSY output; includes internal port arbitration | Required when building standalone dual-port systems or acting as arbitration source in MASTER/SLAVE pairs | Select IDT7133SA20G when you need hardware arbitration capability; 7143SA20G cannot replace it directly due to missing arbitration logic |
| CY7C024AV-20AXC | Cypress 2K × 16 dual-port SRAM with 20 ns access; supports JTAG boundary scan and has different BUSY implementation (bidirectional) | Used in test-accessible designs requiring IEEE 1149.1 compliance; lacks native MASTER/SLAVE expansion signaling | Choose CY7C024AV-20AXC only if JTAG debug visibility is required; pinout and timing differ - PCB redesign needed |
Compared with IDT7133SA20G, 7143SA20G omits arbitration logic and repurposes BUSY as input-only, making it strictly dependent on a MASTER for conflict resolution; versus CY7C024AV-20AXC, it offers proven military-grade packaging options and simpler BUSY integration but lacks JTAG support.
Availability
7143SA20G is available at Aetrix Electronics and suitable for real-time DSP subsystems, redundant safety controllers, high-speed data acquisition front-ends, and legacy bus interface bridges requiring stable component supply across extended production lifecycles.
Supply support for 7143SA20G 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 interface, RF, and sensor solutions, now part of Renesas Electronics.
The IDT7133/7143 family was designed specifically for high-reliability, low-latency dual-port memory applications in aerospace, defense, and industrial control systems requiring deterministic arbitration and seamless data-width expansion.
FAQ
What is the role of BUSY pins on the 7143SA20G?
The BUSY pins (BUSYL and BUSYR) on the 7143SA20G function exclusively as write-inhibit inputs - not outputs. When asserted HIGH by an external MASTER device (e.g., IDT7133SA20G), they block write operations on the corresponding port. This behavior is fixed for the SLAVE configuration and cannot be reconfigured. The 7143SA20G does not generate BUSY signals internally.
Can 7143SA20G operate as a standalone dual-port RAM without a MASTER device?
Yes, the 7143SA20G can operate as a standalone dual-port RAM for non-contention applications where both ports access disjoint memory addresses. However, it lacks on-chip arbitration logic - so simultaneous access to the same address will result in undefined data and potential bus contention unless externally managed. For guaranteed conflict resolution, pairing with IDT7133SA20G as MASTER is required.
Does 7143SA20G support battery backup data retention?
No. The 7143SA20G is the SA (Standard Active) variant and does not support battery backup data retention. Only LA (Low Active) variants like IDT7143LA20G provide 2V data retention capability. The SA version requires continuous 5V supply for data integrity; removing power results in immediate data loss.
What are the valid operating temperature ranges for 7143SA20G?
The 7143SA20G is specified for commercial temperature operation: 0°C to +70°C ambient. While the broader IDT7143 family includes industrial (–40°C to +85°C) and military (–55°C to +125°C) grades, the "20G" speed suffix and "SA" designation in this part number confirm its commercial-grade qualification per IDT documentation.
Which packages are available for 7143SA20G?
The 7143SA20G is offered in three hermetically sealed 68-pin packages: ceramic PGA (GU68), flatpack (FP68), and plastic-leaded chip carrier (PLG68). All share identical pinout and electrical characteristics. The 100-pin TQFP variant applies only to slower speed grades (e.g., X45 and below) and is not available for the 20 ns version.
7143SA20G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 68-BPGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- 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:
- Through Hole
- Supplier Device Package:
- 68-PGA (29.46x29.46)
7143SA20G FAQ
1.How can I place an order for 7143SA20G through Aetrix?
Please submit a Request for Quotation (RFQ) for 7143SA20G 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 7143SA20G reliable?
The price and inventory of 7143SA20G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7143SA20G is usually 5 days.
3.What payment methods are accepted for 7143SA20G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7143SA20G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7143SA20G?
7143SA20G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7143SA20G 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 7143SA20G?
For technical support, including 7143SA20G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7143SA20G requirements.
6.How does Aetrix verify that 7143SA20G is sourced from the original manufacturer or authorized distributors?
All 7143SA20G 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 7143SA20G meets industry standards.
7.What is the process for return or replacement of 7143SA20G?
All 7143SA20G units undergo pre-shipment inspection (PSI). If there is an issue with 7143SA20G, 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 7143SA20G part is unused and in its original packaging.
Return procedure for 7143SA20G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7143SA20G Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
