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Cypress Semiconductor Corp CY7C037V-15AC
- Part No.:
- CY7C037V-15AC
- Manufacturer:
- Cypress Semiconductor Corp
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
CY7C037V-15AC.pdf
- Description:
- IC SRAM 576KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,531
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Product details
Overview
CY7C037V-15AC from Cypress Semiconductor is a 3.3V, 32K × 18-bit true dual-port static RAM with asynchronous operation, 15 ns access time, on-chip arbitration logic, and integrated semaphores for interprocessor resource sharing. It supports independent read/write access on left and right ports simultaneously and is used in multiprocessor communication buffers and video frame memory subsystems.
For engineers reviewing the CY7C037V-15AC datasheet, CY7C037V-15AC pinout, CY7C037V-15AC application, or CY7C037V-15AC equivalent, key selection criteria include x18 data width, TQFP-100 package compatibility, BUSY/INT/SEM signaling behavior, and CMOS-level standby current (10 µA typical) for low-power embedded systems.
Technical Context
This device implements fully asynchronous dual-port architecture with separate address, data, and control buses per port (A0L–A14L/I/O0L–I/O17L/R/WL/OEL/CE0L/CE1L and mirrored right-side signals), enabling concurrent access without external synchronization. Each port features dedicated upper-byte (UBR/UBL) and lower-byte (LBR/LBL) enables, plus master/slave select (M/S) for 36-bit expansion.
Arbitration resolves contention via hardware BUSY assertion (tBLA/tBLC timing), while eight shared semaphore latches provide software-controlled mutual exclusion across ports. Interrupt flags (INTL/INTR) support mailbox-style interport messaging using upper two memory locations (7FFFH/7FFE H for 32K addressing), with interrupt auto-clear on mailbox read.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 18 bits - provides 576 Kbit total storage with byte-selectable 9-bit upper/lower segments |
| Access Time | 15 ns - guarantees deterministic read/write response under worst-case commercial temperature and voltage |
| Supply Voltage | 3.3 V ± 300 mV - compatible with standard LVCMOS I/O interfaces and eliminates level-shifting in 3.3V systems |
| Standby Current (ISB3) | 10 µA typical - enables ultra-low-power sleep mode when both ports driven to CMOS high-impedance |
| Operating Current (ICC) | 115 mA typical - defines active power budget for sustained dual-port traffic at maximum frequency |
| Temperature Range | 0°C to +70°C - validated for commercial-grade reliability in non-harsh ambient environments |
| Package | 100-pin Pb-free TQFP - surface-mount footprint with 0.5 mm pitch, suitable for automated PCB assembly |
Pinout & Package
The CY7C037V-15AC is housed in a 100-pin Thin Quad Flat Package (TQFP) with 0.5 mm lead pitch and exposed thermal pad. Pin functions are strictly asymmetric between left and right ports to support independent bus interfacing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A14L / A0R–A14R | Address Inputs (Left/Right) | 15-bit address bus per port - selects one of 32K locations; no A15 pin used (32K only) |
| I/O0L–I/O8L / I/O0R–I/O8R | Data Bus (Lower Byte) | 9-bit bidirectional data path - LBL/UBL enable controls I/O0–I/O8 segment during byte writes |
| I/O9L–I/O17L / I/O9R–I/O17R | Data Bus (Upper Byte) | 9-bit bidirectional data path - LBR/UBR enable controls I/O9–I/O17 segment during byte writes |
| CE0L/CE1L, CE0R/CE1R | Chip Enable (Dual-input logic) | Active-Low enable requiring CE0 ≤ VIL AND CE1 ≥ VIH - prevents spurious activation from noise or partial control asserts |
| R/WL / R/WR | Read/Write Control | Active-High write strobe - rising edge initiates write; held LOW during read cycles |
| OEL / OER | Output Enable | Active-Low tri-state control - disables outputs independently per port without affecting internal state |
| SEML / SEMR | Semaphore Enable | Active-Low chip select for 8 semaphore latches - overrides CE during semaphore access (A0–A2 address) |
| BUSYL / BUSYR | Contention Indicator | Open-drain output (Master) or input (Slave) - signals arbitration conflict on same-address access |
| INTL / INTR | Interrupt Flag | Open-drain output - asserted when opposite port writes to mailbox location (7FFFH/7FFE H) |
| M/S | Master/Slave Select | Input pin - HIGH configures BUSY as output (master); LOW configures BUSY as input (slave) |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Simultaneous independent read/write to identical memory locations with hardware arbitration - eliminates need for external handshake logic |
| On-Chip Semaphore Logic | Eight dedicated latches accessible via SEM pin - enables atomic resource locking without consuming main memory space or CPU polling overhead |
| Interport Mailbox Messaging | Two reserved top addresses (7FFFH/7FFE H) trigger INTL/INTR on cross-port write - supports deterministic producer-consumer communication |
| Byte-Controlled Data Access | Separate UBL/LBL and UBR/LBR enables - allows 9-bit granular writes to upper or lower half of 18-bit word without masking |
| Automatic Power-Down | Per-port CE-driven sleep mode - reduces ICC to ISB3 (10 µA) when CE inactive, scaling power linearly with active port count |
Applications
| Real-Time Multiprocessor Communication | Dual-Port Video Frame Buffer |
|---|---|
Use Scenario: Two ARM Cortex-M7 cores exchange sensor fusion results and control commands via shared memory. IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-latency inter-core message buffer with semaphore-protected critical sections. Use Value: Eliminates software mutex delays and bus arbitration overhead, enabling sub-microsecond interprocessor handshaking. | Use Scenario: FPGA-based video processor reads rendered frames while GPU writes new frames into same memory region. IC Role / Device Role / Timing Role: Acts as ping-pong frame buffer with independent left/right port timing - no external FIFO or clock domain crossing logic required. Use Value: Sustains 720p60 video throughput (1.2 Gbps aggregate bandwidth) with deterministic 15 ns access latency per pixel block. |
| Industrial PLC I/O Mapping Memory | Communications Protocol Stack Buffer |
Use Scenario: PLC CPU and real-time motion controller share I/O status and command registers in deterministic cyclic scan. IC Role / Device Role / Timing Role: Provides synchronized, contention-resolved access to 32K × 18-bit I/O image table with BUSY-flagged retry logic. Use Value: Guarantees cycle-consistent I/O state visibility across heterogeneous controllers without jitter or dropped updates. | Use Scenario: Baseband processor and RF transceiver exchange LTE MAC layer PDUs using shared descriptor rings and payload buffers. IC Role / Device Role / Timing Role: Serves as descriptor ring and packet buffer with INT-driven notification and SEM-protected ring head/tail pointers. Use Value: Reduces protocol stack interrupt latency by 40% versus PCIe-based shared memory, enabling sub-100 µs handover timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT70V27L15PF | 32K × 16 organization, 15 ns access, 3.3V supply, same TQFP-100 package | Lacks x18 data width and dedicated semaphore latches; requires external logic for resource arbitration | Select when system uses only 16-bit data paths and implements software semaphore management. |
| CY7C036V-15AC | 32K × 16 organization, identical pinout and timing, same Cypress family architecture | Missing I/O16/I/O17 pins and associated UBR/LBR controls - cannot support 18-bit interface or byte-selectable 9-bit segments | Choose only if design strictly requires 16-bit data width and must retain Cypress firmware compatibility. |
Compared with IDT70V27L15PF and CY7C036V-15AC, the CY7C037V-15AC uniquely delivers 18-bit data width with integrated semaphores and mailbox interrupts - reducing BOM count and firmware complexity in tightly coupled multiprocessor systems requiring fine-grained resource sharing.
Availability
CY7C037V-15AC is available at Aetrix Electronics and suitable for real-time multiprocessor communication, dual-port video frame buffering, and industrial PLC I/O mapping requiring stable component supply and long-term obsolescence management.
Supply support for CY7C037V-15AC 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-performance memory and programmable solutions for embedded systems, with emphasis on low-power, mixed-signal integration and automotive-grade reliability.
The CY7C0xxV dual-port SRAM product line targets deterministic interprocessor communication and real-time buffering in industrial automation, telecom infrastructure, and graphics subsystems - prioritizing hardware arbitration and minimal software overhead.
FAQ
What is the function of the M/S pin on CY7C037V-15AC?
The M/S (Master/Slave) pin configures the device's BUSY signal behavior: when HIGH, BUSY pins act as outputs for arbitration result reporting (master mode); when LOW, BUSY pins become inputs for cascading with another device (slave mode). This enables seamless 36-bit memory expansion without external glue logic, and the pin must be hardwired - not dynamically controlled during operation.
How does semaphore access differ from regular memory access?
Semaphore access uses the SEM pin as a dedicated chip select, overriding CE; only A0–A2 address bits are decoded (selecting one of eight latches), and only I/O0 carries the semaphore value during writes. Unlike main memory, semaphores are accessed with identical timing but require tSOP (10 ns minimum) between write and read to ensure latch stability - no address setup or hold timing applies to A3–A14.
Can CY7C037V-15AC operate with mixed voltage interfaces (e.g., 3.3V core, 1.8V I/O)?
No - the device has a single VCC pin rated strictly for 3.3 V ± 300 mV; all I/Os are referenced to this supply and lack voltage translation capability. Interface with 1.8V logic requires external level shifters on all address, data, and control lines, as VIH/VIL thresholds (2.2 V/0.8 V) are incompatible with 1.8V signaling levels.
What happens during simultaneous write attempts to the same address on both ports?
Hardware arbitration asserts BUSYL and BUSYR within tBLA (5 ns typical) after address match, blocking the losing port's write. The winning port completes its write unimpeded; the losing port's data is discarded and its BUSY remains asserted until the winning port releases the location. No data corruption occurs, but software must poll BUSY to retry - no automatic retransmission logic is embedded.
CY7C037V-15AC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Cypress Semiconductor Corp
- Series:
- -
- Package/Case:
- 100-LQFP
- Packaging:
- Bag
- 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:
- 15ns
- Access Time:
- 15 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-15AC FAQ
1.How can I place an order for CY7C037V-15AC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C037V-15AC 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-15AC reliable?
The price and inventory of CY7C037V-15AC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C037V-15AC is usually 5 days.
3.What payment methods are accepted for CY7C037V-15AC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C037V-15AC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C037V-15AC?
CY7C037V-15AC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C037V-15AC 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-15AC?
For technical support, including CY7C037V-15AC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C037V-15AC requirements.
6.How does Aetrix verify that CY7C037V-15AC is sourced from the original manufacturer or authorized distributors?
All CY7C037V-15AC 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-15AC meets industry standards.
7.What is the process for return or replacement of CY7C037V-15AC?
All CY7C037V-15AC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C037V-15AC, 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-15AC part is unused and in its original packaging.
Return procedure for CY7C037V-15AC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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