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Renesas 7142SA100C
- Part No.:
- 7142SA100C
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 48-DIP (0.600", 15.24mm)
- Datasheet:
-
7142SA100C.pdf
- Description:
- IC SRAM 16KBIT PARALLEL SB48
- Quantity:
- Payment:
- Shipping:
Inventory:1,799
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Product details
Overview
7142SA100C from IDT is a 2K × 8 dual-port static RAM configured as a slave device in master/slave memory expansion systems, supporting independent asynchronous read/write access on left and right ports with 100 ns maximum read cycle time, TTL-compatible 5V ±10% supply, and industrial temperature range (–40°C to +85°C). It serves as the data-width-expansion companion to IDT7132SA master RAMs in 16-bit-or-wider memory subsystems for real-time digital signal processors and military avionics.
For engineers reviewing the 7142SA100C datasheet, 7142SA100C pinout, 7142SA100C application, or 7142SA100C equivalent, key selection considerations include BUSY input functionality (not output), absence of on-chip arbitration logic, compatibility with IDT7132SA/LA master devices, 48-pin flatpack or PLCC packaging, and 100 ns timing grade for high-throughput buffer applications requiring deterministic port contention resolution.
Technical Context
The 7142SA100C implements a true dual-port architecture with fully independent address, control, and I/O buses per port-no shared internal arbitration logic. Its BUSY pin functions exclusively as an input to gate write operations during port contention, unlike the IDT7132SA which drives BUSY as an open-drain output.
It supports CE-controlled and R/W-controlled write cycles with defined tWC = 100 ns, tWP = 55 ns, and tBDD = 65 ns (BUSY disable to valid data), and operates with full 5V TTL-level compatibility including VIH = 2.2 V min and VIL = 0.8 V max, enabling direct interfacing with legacy microcontrollers and DSPs without level translation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 2K × 8 (2048 words × 8 bits), providing 16 KB total storage capacity with dual independent access paths |
| Max Read Cycle Time (tRC) | 100 ns - defines minimum interval between successive reads on same port; critical for real-time FIFO buffering |
| Write Pulse Width (tWP) | 55 ns minimum - sets shortest controllable write duration; enables tight timing in burst-mode controllers |
| Supply Voltage | 5.0 V ±10% (4.5–5.5 V) - ensures interoperability with standard TTL/CMOS logic families without regulation overhead |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded systems including motor drives and telecom line cards |
| Standby Current (ISB3) | 1.0 mA typical (full CMOS standby) - enables low-power sleep modes in battery-backed or energy-conscious designs |
| Input Leakage Current | 5 µA max - guarantees reliable high-impedance hold during CE-disabled states without external pull-ups |
Pinout & Package
7142SA100C is available in 48-pin flatpack (FP48) and 52-pin PLCC (PLG52) packages. Pin functions are identical across both packages except for pin count and physical layout; FP48 uses pins 1–48, PLG52 adds four NC pins (1, 49–52).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left/Right) | Active-low enable per port; deassertion places respective port into ISB1/ISB2/ISB3 low-power state |
| OEL / OER | Output Enable (Left/Right) | Active-low control for I/O drivers; allows high-Z tri-state during shared-bus operation |
| R/WL / R/WR | Read/Write Control (Left/Right) | High = read, low = write; determines direction of data flow on I/O lines for each port independently |
| BUSYL / BUSYR | BUSY Input (Left/Right) | Active-low signal from IDT7132 master; internally gates writes when asserted, preventing data corruption |
| A0L–A10L / A0R–A10R | Address Inputs (Left/Right) | 11-bit address bus per port; supports full 2K-word addressing without external decoding |
| I/O0L–I/O7L / I/O0R–I/O7R | Data I/O Lines (Left/Right) | Bidirectional 8-bit data path per port; electrically isolated to prevent cross-port coupling |
| VCC / GND | Power Supply | Single 5V supply with multiple VCC/GND pairs required for noise immunity and current distribution |
Key Features
| Feature | Design Value |
|---|---|
| Slave-only BUSY interface | Accepts BUSY input from IDT7132 master to automatically inhibit concurrent writes-eliminates need for external arbitration logic in width-expanded systems |
| Independent port power control | Separate CEL/CER enables selective port shutdown, reducing dynamic current by up to 65% when one port is idle |
| TTL-compatible signaling | Direct interface with 5V microcontrollers, FPGAs, and DSPs without level shifters-reduces BOM count and layout complexity |
| 100 ns timing grade | Supports 10 MHz sustained memory throughput per port, suitable for real-time video frame buffers and radar pulse processing |
| Industrial temperature qualification | Validated operation from –40°C to +85°C ensures reliability in uncontrolled environments like factory automation and outdoor base stations |
Applications
| Real-Time Digital Signal Processing | Redundant Control Systems |
|---|---|
|
Use Scenario: Dual-port RAM used as ping-pong buffer between ADC sampling engine and DSP core, allowing simultaneous capture and processing. IC Role / Device Role / Timing Role: Slave memory in master/slave pair with IDT7132SA; receives BUSY input to stall writes during address collision, ensuring deterministic latency. Use Value: Enables zero-wait-state data handoff at 10 MHz sustained rate, eliminating software-managed synchronization overhead. |
Use Scenario: Fault-tolerant flight controller using two independent processor channels sharing status and command data via dual-port RAM. IC Role / Device Role / Timing Role: Slave device synchronized to master IDT7132SA; BUSY input prevents conflicting writes during failover transitions. Use Value: Guarantees atomic update of shared control registers without software locks or polling, meeting DO-254 safety requirements. |
| Military Radar Front-End | Industrial Motor Drive Controller |
|
Use Scenario: High-speed waveform generator storing pulse profiles and modulation tables accessed concurrently by timing sequencer and calibration module. IC Role / Device Role / Timing Role: 100 ns slave RAM in 32-bit wide memory bank built with four IDT7142SA100C units and one IDT7132SA100C master. Use Value: Delivers 100 MB/s aggregate bandwidth with hardware-enforced write collision avoidance, meeting MIL-STD-810G shock/vibe specs. |
Use Scenario: Servo drive executing position loop (10 kHz) and current loop (50 kHz) simultaneously, sharing encoder feedback and PWM duty data. IC Role / Device Role / Timing Role: Industrial-temp slave RAM interfaced to dual-core ARM Cortex-M7; BUSY input prevents corrupted torque commands during transient overload. Use Value: Maintains sub-microsecond inter-core coordination under thermal stress, achieving IEC 61800-5-1 functional safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Cypress CY7C024AV-100AXC | 100 ns, 2K × 16 organization, integrated BUSY arbitration, 3.3V/5V tolerant I/O | Single-chip 16-bit solution eliminates master/slave pairing; requires voltage translation for pure 5V systems | Select when simplifying board layout outweighs cost premium and when 16-bit native width is preferred over expandable 8-bit architecture |
| Integrated Device Technology IDT7132SA100C | 100 ns master device with on-chip arbitration logic and open-drain BUSY outputs; pin-compatible but functionally asymmetric | Must be paired with 7142SA100C as master; cannot operate standalone as slave; different pin behavior on BUSY pins | Select only as the mandatory master counterpart in width-expanded systems-never as a drop-in replacement for 7142SA100C |
Compared with CY7C024AV-100AXC, 7142SA100C offers lower system-level cost in 8-bit bus architectures and guaranteed industrial temp operation without derating, while IDT7132SA100C serves strictly as its master partner-not a functional substitute.
Availability
7142SA100C is available at Aetrix Electronics and suitable for real-time digital signal processing, redundant control systems, military radar front-ends, industrial motor drive controllers, and avionics data concentrators requiring stable component supply across extended lifecycle programs.
Supply support for 7142SA100C 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) was a fabless semiconductor company specializing in high-performance timing, memory, and interface ICs before its acquisition by Renesas Electronics in 2019.
The IDT7142 family was designed specifically for width-expansible dual-port SRAM systems where deterministic hardware arbitration replaces software-managed mutual exclusion in safety-critical and real-time embedded applications.
FAQ
Is 7142SA100C a standalone dual-port RAM or does it require a master device?
7142SA100C is a slave-only device and must be used with an IDT7132SA/LA master in width-expanded memory systems. It lacks on-chip arbitration logic and relies on external BUSY input signals to manage port contention-unlike the IDT7132SA100C, which contains full arbitration and drives BUSY outputs. Using 7142SA100C without a master violates its functional specification and risks data corruption during simultaneous access.
What is the role of BUSYL and BUSYR pins on 7142SA100C?
On 7142SA100C, BUSYL and BUSYR are dedicated input pins-not outputs-that accept active-low BUSY signals from an IDT7132SA master device. When asserted, they internally inhibit write operations on the corresponding port, preventing data corruption during address collisions. These pins require no pull-up resistors (unlike IDT7132SA's open-drain BUSY outputs) and must be driven directly by the master's BUSY outputs.
Does 7142SA100C support battery backup or data retention below 5V?
No, 7142SA100C does not support battery backup or low-voltage data retention. Only the LA suffix variants (e.g., 7142LA100C) provide 2V data retention capability. The SA suffix denotes standard active power consumption and requires continuous 5V ±10% supply for operation and data retention-applying less than 4.5V will result in undefined behavior and potential data loss.
Which packages are available for 7142SA100C and are they pin-compatible?
7142SA100C is offered in 48-pin flatpack (FP48) and 52-pin PLCC (PLG52) packages. While electrical pin functions are identical, the PLCC version includes four no-connect (NC) pins (1, 49–52) absent in FP48. PCB layouts are not interchangeable-FP48 uses a 0.57″ × 0.57″ footprint with side-braze leads, whereas PLG52 uses a 0.75″ × 0.75″ J-lead body requiring different land patterns and reflow profiles.
Can 7142SA100C operate at commercial temperature range (0°C to +70°C)?
Yes, 7142SA100C is rated for industrial temperature (–40°C to +85°C), which fully encompasses the commercial range. However, the "C" suffix in 7142SA100C specifically denotes commercial-grade screening-not temperature grade-and indicates testing per commercial reliability standards. Its guaranteed operation remains –40°C to +85°C, making it suitable for both commercial and industrial deployments without derating.
7142SA100C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 48-DIP (0.600", 15.24mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 16Kbit
- Memory Organization:
- 2K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 100ns
- Access Time:
- 100 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 48-SIDE BRAZED
7142SA100C FAQ
1.How can I place an order for 7142SA100C through Aetrix?
Please submit a Request for Quotation (RFQ) for 7142SA100C 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 7142SA100C reliable?
The price and inventory of 7142SA100C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7142SA100C is usually 5 days.
3.What payment methods are accepted for 7142SA100C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7142SA100C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7142SA100C?
7142SA100C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7142SA100C 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 7142SA100C?
For technical support, including 7142SA100C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7142SA100C requirements.
6.How does Aetrix verify that 7142SA100C is sourced from the original manufacturer or authorized distributors?
All 7142SA100C 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 7142SA100C meets industry standards.
7.What is the process for return or replacement of 7142SA100C?
All 7142SA100C units undergo pre-shipment inspection (PSI). If there is an issue with 7142SA100C, 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 7142SA100C part is unused and in its original packaging.
Return procedure for 7142SA100C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7142SA100C Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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