My Inquiry
My Account
Renesas 7140SA100CB
- Part No.:
- 7140SA100CB
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 48-DIP (0.600", 15.24mm)
- Datasheet:
-
7140SA100CB.pdf
- Description:
- IC SRAM 8KBIT PARALLEL SB48
- Quantity:
- Payment:
- Shipping:
Inventory:4,174
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
7140SA100CB from IDT (Integrated Device Technology) is a high-speed 1K × 8 dual-port static RAM configured as a SLAVE device in MASTER/SLAVE memory expansion systems. It features 100ns maximum read/write cycle time, TTL-compatible 5V ±10% operation, and dual independent asynchronous ports with dedicated address, data, and control lines - enabling concurrent access for real-time inter-processor communication in avionics data buffers.
For engineers reviewing the 7140SA100CB datasheet, 7140SA100CB pinout, 7140SA100CB application, or 7140SA100CB equivalent, key selection criteria include BUSY input behavior (not output), absence of on-chip arbitration logic, compatibility with IDT7130SA/LA MASTER devices, and support for industrial temperature range (–40°C to +85°C) in ceramic flatpack packaging.
Technical Context
The 7140SA100CB operates as a SLAVE dual-port SRAM with no internal port arbitration logic - it relies entirely on external BUSY signaling from a MASTER IDT7130 device to manage contention. Its BUSYL and BUSYR pins are inputs only, used to inhibit writes when asserted low, unlike the MASTER's open-drain BUSY outputs.
It supports fully asynchronous dual-port operation with separate R/WL/R/WR, CEL/CER, OEL/OER, and A0L–A9L/A0R–A9R buses. The device enters low-power standby (ISB1 = 20mA max) when both chip enables are high, and retains full 1K × 8 memory mapping without internal banking or interleaving.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 1K × 8 (1024 words × 8 bits), single contiguous array - no segmentation or bank switching required in system design |
| Access Time (tRC) | 100ns maximum - defines minimum cycle time for consecutive reads/writes on either port |
| Supply Voltage | 5.0V ±10% (4.5V–5.5V) - compatible with standard TTL logic families without level translation |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded systems including motor control and test equipment |
| Standby Current (ISB1) | 20mA maximum (both ports disabled) - enables power-sensitive applications where CE-driven sleep states are used |
| I/O Interface | TTL-compatible inputs and outputs - direct interfacing with 74LS/74F logic and microcontrollers without bus buffers |
| Port Configuration | Left port (L) and right port (R) with fully independent control - supports simultaneous read/write across ports with external arbitration |
Pinout & Package
7140SA100CB is packaged in a 48-pin ceramic flatpack (FP48), measuring approximately 0.75 in × 0.75 in × 0.11 in, with through-hole mounting and hermetic sealing suitable for high-reliability industrial and aerospace applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | All GND pins must be connected to system ground plane; multiple pins reduce ground impedance and noise coupling |
| VCC | Power supply | All VCC pins require local 0.1µF ceramic decoupling; failure to connect all causes functional instability |
| CEL / CER | Chip enable (left/right) | Active-low enables - assertion initiates port access; deassertion places I/O in high-Z and reduces current to ISB1/ISB2 levels |
| OEL / OER | Output enable (left/right) | Active-low controls data bus drivers - allows shared bus usage without external tri-state logic |
| R/WL / R/WR | Read/write direction (left/right) | High = read, low = write - determines data flow direction independently per port |
| A0L–A9L / A0R–A9R | Address inputs (left/right) | 10-bit address buses select one of 1024 locations per port; no address latching required |
| I/O0L–I/O7L / I/O0R–I/O7R | Bidirectional data (left/right) | 8-bit parallel data paths - driven during writes, tri-stated during reads unless OE active |
| BUSYL / BUSYR | BUSY input (left/right) | Active-low slave arbitration inputs - when low, internally blocks writes to respective port regardless of R/W state |
| INTL / INTR | Interrupt flag (left/right) | Open-drain outputs - require external pull-up; indicate port-to-port interrupt events (e.g., address 3FF/3FE writes) |
Key Features
| Feature | Design Value |
|---|---|
| Dual-port SLAVE architecture | Enables seamless 16-bit+ memory expansion with IDT7130 MASTER - eliminates discrete glue logic for bus width scaling |
| BUSY-input-only arbitration | Removes need for external priority encoders; contention resolution handled by MASTER's BUSY outputs driving SLAVE's BUSY inputs |
| 100ns cycle time at industrial temp | Guaranteed timing over –40°C to +85°C - supports deterministic real-time response in motion control and digital signal processing buffers |
| TTL-compatible 5V interface | Direct connection to legacy microcontrollers (e.g., 80C188, TMS320C25) without voltage translation or bus repeaters |
| Ceramic flatpack (FP48) package | Hermetic seal and thermal stability - meets MIL-PRF-38535 QML requirements for extended life in harsh environments |
Applications
| Avionics Data Buffering | Industrial Motion Controller |
|---|---|
Use Scenario: Real-time exchange of position commands and encoder feedback between flight control computer (FCC) and actuator controller units (ACUs). IC Role / Device Role / Timing Role: SLAVE dual-port RAM provides synchronized, low-latency memory window for cross-domain data sharing - left port connected to FCC, right port to ACU. Use Value: 100ns cycle time ensures sub-microsecond data coherency; BUSY-input arbitration prevents race conditions during simultaneous updates. |
Use Scenario: Coordinating multi-axis servo drives in CNC machines using shared trajectory tables and status flags. IC Role / Device Role / Timing Role: Dual-port SRAM acts as shared memory between PLC master and motion coprocessor - left port for PLC writes, right port for coprocessor reads. Use Value: Independent asynchronous access eliminates polling delays; INTL/INTR flags signal completion of parameter updates without CPU overhead. |
| Test Equipment Pattern Memory | Digital Signal Processing Buffer |
Use Scenario: Storing stimulus patterns and expected responses in automated test equipment (ATE) for semiconductor wafer probing. IC Role / Device Role / Timing Role: SLAVE device holds pattern data accessed concurrently by pattern generator (left port) and comparator (right port). Use Value: Ceramic FP48 package ensures stable timing across temperature cycling; 100ns access supports >10MHz pattern rates. |
Use Scenario: Interleaved buffering between ADC sampling engine and DSP core in radar front-end modules. IC Role / Device Role / Timing Role: Dual-port RAM decouples sampling clock domain (left port) from processing clock domain (right port) - eliminating FIFO depth constraints. Use Value: No internal arbitration logic simplifies timing analysis; BUSY-driven write blocking guarantees data integrity during overlapping accesses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C131-100AXC | 1K × 8, 100ns, 5V, but uses different BUSY arbitration model (bidirectional BUSY pin) and lacks dedicated INTL/INTR flags | Requires redesign of interrupt handling and contention logic; not drop-in for IDT7130/7140 MASTER/SLAVE topology | Select only if migrating from scratch - not recommended for existing IDT-based designs requiring pin- and function-level compatibility |
| AS7C31025B-100JC | 1K × 8, 100ns, 5V, but is a single-port SRAM with external bus controller; no native dual-port arbitration or BUSY/INT signals | Needs additional logic (e.g., CPLD) to emulate dual-port behavior - increases BOM cost and board area | Consider only for cost-sensitive, non-real-time applications where latency and arbitration determinism are not critical |
Compared with CY7C131-100AXC and AS7C31025B-100JC, the 7140SA100CB delivers purpose-built SLAVE functionality with guaranteed BUSY-input timing and integrated interrupt signaling - enabling simpler, more reliable MASTER/SLAVE memory expansion without external arbitration logic.
Availability
7140SA100CB is available at Aetrix Electronics and suitable for avionics data buffering, industrial motion control, and automated test equipment requiring stable component supply across extended product lifecycles and temperature extremes.
Supply support for 7140SA100CB 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, now part of Renesas Electronics since 2019.
The 7140SA100CB belongs to IDT's legacy dual-port SRAM product line, designed specifically for deterministic, low-latency inter-processor communication in military, industrial, and telecommunications infrastructure.
FAQ
What is the role of 7140SA100CB in a MASTER/SLAVE dual-port memory system?
The 7140SA100CB functions exclusively as a SLAVE device - it receives BUSY signals from a MASTER IDT7130 to block writes during contention and lacks on-chip arbitration logic. Its BUSYL and BUSYR pins are inputs only, and it relies on the MASTER for priority resolution. This architecture enables scalable 16-bit+ memory expansion without external logic, and the 7140SA100CB maintains full 100ns timing compliance in industrial temperature range.
Does 7140SA100CB support battery backup or data retention mode?
No, the 7140SA100CB does not support battery backup or low-voltage data retention. That capability is exclusive to LA-suffixed variants (e.g., 7140LA100CB), which specify 2.0V data retention and microamp-level standby current. The 'SA' suffix denotes standard active power consumption (550mW typ.) and requires continuous 5V supply for operation - making the 7140SA100CB suitable for mains-powered industrial systems but not battery-backed applications.
Which package type is used for 7140SA100CB, and what are its mechanical characteristics?
The 7140SA100CB is supplied in a 48-pin ceramic flatpack (FP48) package, with dimensions approximately 0.75 in × 0.75 in × 0.11 in. It features a hermetically sealed ceramic body, gold-plated leads, and through-hole mounting - meeting MIL-PRF-38535 QML requirements for reliability in high-vibration, wide-temperature, and long-lifecycle applications such as aerospace and defense electronics.
How does interrupt generation work on 7140SA100CB?
The 7140SA100CB uses dedicated INTL and INTR open-drain outputs to signal port-to-port interrupts. Writing to address 3FFH on the left port sets the right-port INTR flag; writing to 3FEH on the right port sets the left-port INTL flag. These flags remain asserted until cleared by a corresponding write (e.g., 3FFH to right port clears INTR). The 7140SA100CB requires external pull-up resistors on INTL/INTR lines, and timing is specified with tINS ≤ 25ns (max) at industrial temperature.
Can 7140SA100CB operate standalone without a MASTER device?
Yes, the 7140SA100CB can operate as a standalone dual-port SRAM - both ports function independently with full read/write capability as long as BUSYL and BUSYR are held high (e.g., via pull-up resistors). However, without a MASTER IDT7130 asserting BUSY during contention, simultaneous writes to the same address will result in undefined data. For deterministic arbitration, pairing with a MASTER is mandatory; standalone use is limited to non-contention scenarios or externally managed access protocols.
7140SA100CB 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:
- 8Kbit
- Memory Organization:
- 1K 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:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 48-SIDE BRAZED
7140SA100CB FAQ
1.How can I place an order for 7140SA100CB through Aetrix?
Please submit a Request for Quotation (RFQ) for 7140SA100CB 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 7140SA100CB reliable?
The price and inventory of 7140SA100CB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7140SA100CB is usually 5 days.
3.What payment methods are accepted for 7140SA100CB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7140SA100CB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7140SA100CB?
7140SA100CB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7140SA100CB 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 7140SA100CB?
For technical support, including 7140SA100CB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7140SA100CB requirements.
6.How does Aetrix verify that 7140SA100CB is sourced from the original manufacturer or authorized distributors?
All 7140SA100CB 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 7140SA100CB meets industry standards.
7.What is the process for return or replacement of 7140SA100CB?
All 7140SA100CB units undergo pre-shipment inspection (PSI). If there is an issue with 7140SA100CB, 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 7140SA100CB part is unused and in its original packaging.
Return procedure for 7140SA100CB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7140SA100CB 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…
