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Cypress Semiconductor Corp CY7C037V-20AXC
- Part No.:
- CY7C037V-20AXC
- Manufacturer:
- Cypress Semiconductor Corp
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
CY7C037V-20AXC.pdf
- Description:
- IC SRAM 576KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,656
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Product details
Overview
CY7C037V-20AXC from Cypress Semiconductor is a 3.3V, 32K × 18-bit true dual-port static RAM with independent left/right ports, 20 ns access time, on-chip arbitration logic, and integrated semaphores for interprocessor resource sharing - used in real-time embedded multiprocessor communication buffers.
For engineers reviewing the CY7C037V-20AXC datasheet, CY7C037V-20AXC pinout, CY7C037V-20AXC application, or CY7C037V-20AXC equivalent, key selection considerations include simultaneous port access timing, BUSY/INT/SEM signal coordination, byte-select control (UBL/LBL), master/slave expansion capability, and low ISB3 standby current (10 µA) in CMOS-level sleep mode.
Technical Context
This device implements fully asynchronous dual-port SRAM architecture with separate address, data, and control buses per port (A0L–A14L/I/O0L–I/O17L/R/WL/CE0L/CE1L/OEL/SEML/INTL/BUSYL/UBL/LBL on left; mirrored on right), enabling deterministic contention resolution via hardware BUSY assertion within tBLA/tBLC.
Arbitration is handled by on-die logic that detects address matches within tPS (≤5 ns), while semaphore latches (8 shared, accessed via SEM + A0–A2) provide software-managed mutual exclusion across ports without external logic - critical for mailbox-style interprocessor messaging using upper memory locations (7FFFH/7FFEh).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 18-bit (589,824 bits total); supports independent 18-bit reads/writes per port |
| Access Time | 20 ns maximum - guarantees valid data at outputs within 20 ns after CE or OE assertion |
| Supply Voltage | 3.3 V ± 300 mV - requires tight-regulated 3.3V rail; not compatible with 5V or mixed-voltage systems |
| Standby Current (ISB3) | 10 µA typical (both ports at CMOS high level) - enables ultra-low-power hold mode in battery-backed systems |
| Operating Current (ICC) | 115 mA typical - defines peak power draw during active burst transfers |
| I/O Voltage Levels | TTL-compatible inputs (VIH = 2.2 V, VIL = 0.8 V); outputs drive 4 mA at VOH ≥ 2.4 V / VOL ≤ 0.4 V |
| Temperature Range | 0°C to +70°C (Commercial grade) - validated for ambient operation without derating |
Pinout & Package
100-pin Lead(Pb)-free Thin Quad Flatpack (TQFP), 14 mm × 14 mm body, 0.5 mm pitch. Pin mapping validated per Cypress Document #38-06078 Rev. *A (Pages 2–3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A14L / A0R–A14R | Left/Right Address Inputs | 15-bit address bus per port; selects one of 32K (2¹⁵) memory locations independently |
| I/O0L–I/O17L / I/O0R–I/O17R | Left/Right Data Bus | 18-bit bidirectional data path; I/O0–I/O8 = lower byte + parity bit; I/O9–I/O17 = upper byte |
| CE0L/CE1L, CE0R/CE1R | Chip Enable (Dual Input Logic) | Active-low enable requires CE0 ≤ 0.8 V AND CE1 ≥ 2.2 V - prevents accidental activation from noise or floating pins |
| R/WL / R/WR | Read/Write Control | High = read, low = write; controls direction of data flow on respective I/O bus |
| OEL / OER | Output Enable | Enables tristate output drivers; allows data read without asserting CE (e.g., for bus sharing) |
| SEML / SEMR | Semaphore Enable | Activates 8-bit semaphore latch bank (A0–A2 addressable); CE must remain HIGH during SEM assertion |
| INTL / INTR | Interrupt Flag Output | Open-drain active-low signal asserted when opposite port writes to mailbox (7FFEh/7FFFh) |
| BUSYL / BUSYR | Contention Indicator | In Master mode: output indicating local port lost arbitration; in Slave mode: input receiving master's BUSY signal |
| UBL / UBR, LBL / LBR | Byte Select Controls | Enable upper (I/O9–I/O17) or lower (I/O0–I/O8) 9-bit byte during 18-bit accesses - supports 9-bit peripheral interfacing |
| M/S | Master/Slave Configuration | High = Master (BUSY pins output); Low = Slave (BUSY pins input); enables 36-bit expansion without external logic |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Simultaneous, independent read/write to same location with deterministic BUSY arbitration - eliminates need for external handshake logic |
| On-Chip Semaphore Logic | Eight dedicated hardware latches accessible via SEM pin + A0–A2 - enables atomic resource locking without software polling overhead |
| Configurable Master/Slave Mode | M/S pin selects BUSY pin direction, allowing seamless 36-bit memory expansion using identical CY7C037V devices - no external glue logic required |
| Dual Byte Enables (UBL/LBL) | Independent control of upper and lower 9-bit bytes - supports mixed-width peripherals and partial-word updates without read-modify-write cycles |
| Ultra-Low Standby Power | 10 µA ISB3 current with both ports at CMOS high - suitable for always-on buffer applications with periodic wake-up |
Applications
| Industrial PLC Communication Buffer | Avionics Display Frame Memory |
|---|---|
Use Scenario: Two independent microcontrollers exchange status and command data via shared memory in a safety-critical programmable logic controller. IC Role / Device Role / Timing Role: Dual-port SRAM acts as non-blocking interprocessor mailbox with hardware semaphore coordination and BUSY-driven collision avoidance. Use Value: Eliminates software polling delays and ensures deterministic response under worst-case contention, meeting IEC 61131-3 cycle-time requirements. | Use Scenario: Primary flight display system uses separate graphics processor and flight management unit accessing common frame buffer memory. IC Role / Device Role / Timing Role: CY7C037V provides concurrent pixel write (GPU port) and metadata read (FMS port) with 20 ns access guaranteeing real-time overlay rendering. Use Value: Sustains 60 Hz refresh with zero-frame-latency handoff between subsystems using INT-driven mailbox interrupts. |
| Medical Imaging Data Pipeline | Test Equipment Pattern Generator |
Use Scenario: High-speed ADC digitizes ultrasound echo data while DSP processes prior frames - requiring continuous streaming into shared memory. IC Role / Device Role / Timing Role: Left port captures raw 18-bit ADC samples; right port streams processed data to DAC or network interface - fully asynchronous operation prevents pipeline stalls. Use Value: 32K × 18-bit depth accommodates full-line buffering at 40 MSPS; ISB3 < 10 µA extends battery life in portable units. | Use Scenario: Automated test equipment generates precise stimulus patterns while host controller loads next sequence - overlapping execution and preparation. IC Role / Device Role / Timing Role: Dual-port RAM serves as pattern memory: pattern generator reads via right port; host CPU writes new vectors via left port with semaphore-controlled access. Use Value: On-chip semaphores prevent corruption during vector reload; 20 ns access enables >50 MHz pattern clock rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT70V27L20PF | 32K × 18, 3.3V, 20 ns, but uses single CE and lacks M/S pin - requires external logic for 36-bit expansion | No integrated master/slave mode; semaphore implementation requires external latches or firmware coordination | Select when board space permits discrete arbitration logic and expansion is not required |
| ISSI IS61WV3218-20ED | 32K × 18, 3.3V, 20 ns, but only supports asynchronous single-port operation - no true dual-port capability | Cannot perform simultaneous read/write; requires external FIFO or controller for interprocessor buffering | Select only if application does not require concurrent port access or hardware arbitration |
Compared with IDT70V27L20PF and ISSI IS61WV3218-20ED, CY7C037V-20AXC uniquely integrates M/S configuration, dual CE logic, and dedicated semaphore latches - reducing BOM count and eliminating timing-critical external arbitration design.
Availability
CY7C037V-20AXC is available at Aetrix Electronics and suitable for industrial PLC communication buffers, avionics display frame memory, medical imaging data pipelines, and automated test equipment pattern generators requiring stable component supply and long-term obsolescence planning.
Supply support for CY7C037V-20AXC 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
Cypress Semiconductor (now part of Infineon Technologies) designs high-reliability memory and programmable solutions for industrial, automotive, and communications systems.
CY7C037V belongs to the CY7C0xxV dual-port SRAM product line, engineered specifically for deterministic interprocessor communication in real-time embedded systems where hardware arbitration and low-latency mailboxing are mandatory.
FAQ
What is the function of the M/S pin on CY7C037V-20AXC?
The M/S (Master/Slave) pin configures BUSY pin behavior: when HIGH, BUSY pins act as outputs for arbitration result signaling to slave devices; when LOW, BUSY pins become inputs to receive arbitration status from a master. This enables seamless 36-bit memory expansion using identical CY7C037V devices without external logic.
How do the semaphore latches operate in CY7C037V-20AXC?
Semaphores are eight dedicated hardware latches accessed via SEM pin assertion and A0–A2 address lines. Writing '0' to a semaphore grants exclusive access to that resource; reading returns the current state. Only the side that successfully wrote '0' can modify it - enabling atomic resource locking without software race conditions.
Can CY7C037V-20AXC operate with mixed voltage interfaces?
No. CY7C037V-20AXC is strictly a 3.3V ±300 mV device with TTL-compatible input thresholds (VIH = 2.2 V, VIL = 0.8 V) and 4 mA output drive. It cannot interface directly with 5V or 1.8V logic without level-shifting circuitry, as exceeding VCC+0.5V on any pin violates absolute maximum ratings.
What memory locations are reserved for interrupt mailbox functionality?
The two highest addresses in the 32K space are reserved: 7FFFh is the right-port mailbox and 7FFEh is the left-port mailbox. Writing to the opposite port's mailbox asserts its INT pin; reading clears the interrupt. The BUSY signal blocks mailbox access during contention to prevent inconsistent reads.
CY7C037V-20AXC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Cypress Semiconductor Corp
- Series:
- -
- Package/Case:
- 100-LQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 576Kbit
- Memory Organization:
- 32K x 18
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 20ns
- Access Time:
- 20 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
CY7C037V-20AXC FAQ
1.How can I place an order for CY7C037V-20AXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C037V-20AXC 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 CY7C037V-20AXC reliable?
The price and inventory of CY7C037V-20AXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C037V-20AXC is usually 5 days.
3.What payment methods are accepted for CY7C037V-20AXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C037V-20AXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C037V-20AXC?
CY7C037V-20AXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C037V-20AXC 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 CY7C037V-20AXC?
For technical support, including CY7C037V-20AXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C037V-20AXC requirements.
6.How does Aetrix verify that CY7C037V-20AXC is sourced from the original manufacturer or authorized distributors?
All CY7C037V-20AXC 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 CY7C037V-20AXC meets industry standards.
7.What is the process for return or replacement of CY7C037V-20AXC?
All CY7C037V-20AXC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C037V-20AXC, 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 CY7C037V-20AXC part is unused and in its original packaging.
Return procedure for CY7C037V-20AXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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