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Infineon Technologies CY7C1041B-15ZC
- Part No.:
- CY7C1041B-15ZC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 44-TSOP (0.400", 10.16mm Width)
- Datasheet:
-
CY7C1041B-15ZC.pdf
- Description:
- IC SRAM 4MBIT PARALLEL 44TSOP II
- Quantity:
- Payment:
- Shipping:
Inventory:1,608
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Product details
Overview
CY7C1041B-15ZC from Cypress Semiconductor is a 256K × 16-bit (4-Mbit) high-speed CMOS static RAM with 15 ns access time, 5 V supply, TTL-compatible I/O, and dual-byte write enable (BLE/BHE) for independent lower/upper word access. It operates across commercial temperature range (0°C to +70°C) and supports automatic CE-controlled power-down in standby mode. Used in real-time data buffering for industrial controllers and legacy embedded systems requiring deterministic SRAM timing.
For engineers reviewing the CY7C1041B-15ZC datasheet, CY7C1041B-15ZC pinout, CY7C1041B-15ZC application, or CY7C1041B-15ZC equivalent, this page delivers verified electrical specs, SOJ-44 pin mapping, byte-select operation details, retention behavior at 2.0 V, and direct alternatives for memory upgrade or sourcing continuity.
Technical Context
The CY7C1041B-15ZC implements a full asynchronous SRAM architecture with separate address decoding for 262,144 × 16-bit storage. Its read/write control relies on three independent enables: Chip Enable (CE), Output Enable (OE), and Write Enable (WE), with Byte Low Enable (BLE) and Byte High Enable (BHE) enabling 8-bit granularity writes without external logic.
It features dual power domains: internal voltage regulation steps down 5 V to ~3.3 V for core logic, while I/O remains TTL-compatible. Standby current drops to 0.5 mA (L version) when CE is HIGH, and data retention is guaranteed at 2.0 V with ≤400 µW consumption - critical for battery-backed applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 256K × 16-bit (4,194,304 bits); supports 16-bit parallel bus interface without glue logic |
| Access Time (tAA) | 15 ns max; ensures compatibility with 66 MHz CPU buses in legacy industrial designs |
| VCC Supply Voltage | 5.0 V ± 0.5 V; matches standard TTL/CMOS system rails and eliminates need for auxiliary regulators |
| Standby Current (ISB2) | 0.5 mA max (L version); enables low-power hold mode during processor sleep in portable instrumentation |
| Data Retention Voltage | 2.0 V min; allows operation from single-cell Li-ion or backup coin cell without level-shifting circuitry |
| I/O Capacitance | 8 pF max per pin; reduces signal integrity risk on dense PCBs with long trace runs |
| Operating Temperature | 0°C to +70°C; validated for commercial-grade embedded systems including test equipment and telecom line cards |
Pinout & Package
Package: 44-pin SOJ (Small Outline J-lead), 400-mil body width, center power/ground pinout (VCC on pins 15 & 31, VSS on pins 16 & 32).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; no address multiplexing required |
| I/O0–I/O7 | Lower-Byte Bidirectional Data | Driven during read when BLE = LOW; latched on write when BLE = LOW and WE = LOW |
| I/O8–I/O15 | Upper-Byte Bidirectional Data | Driven during read when BHE = LOW; latched on write when BHE = LOW and WE = LOW |
| CE | Chip Enable | Active-LOW global select; forces high-impedance I/O and auto power-down when HIGH |
| OE | Output Enable | Active-LOW read control; disables outputs (high-Z) when HIGH, independent of CE state |
| WE | Write Enable | Active-LOW write strobe; initiates write cycle only when CE = LOW and WE = LOW |
| BLE | Byte Low Enable | Active-LOW control for lower 8-bit data path; enables partial-word writes without masking logic |
| BHE | Byte High Enable | Active-LOW control for upper 8-bit data path; pairs with BLE for true 16-bit or split-byte operation |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Byte Write Control | Independent BLE/BHE inputs allow 8-bit writes to either half of the 16-bit bus - eliminates need for external byte-mask logic in microcontroller interfaces |
| Automatic Power-Down | CE HIGH automatically reduces ICC to ≤0.5 mA (L version) without external control signals or sequencing |
| TTL-Compatible I/O | VIH = 2.2 V min, VOL = 0.4 V max at 8 mA - interoperates directly with 5 V microcontrollers, FPGAs, and ASICs without level shifters |
| 2.0 V Data Retention | Guaranteed data hold at 2.0 V supply with ≤400 µW consumption - supports battery-backed SRAM operation in power-fail scenarios |
| Low-Impedance Outputs | tLZOE = 0 ns, tHZOE = 7 ns - enables fast bus turnaround in shared-memory multi-master systems |
Applications
| Industrial PLC Data Buffer | Legacy Telecom Line Card Cache |
|---|---|
Use Scenario: Real-time I/O scan buffering in programmable logic controllers where deterministic latency is required between fieldbus interrupt and CPU fetch. IC Role / Device Role / Timing Role: Asynchronous SRAM providing zero-wait-state 16-bit data storage with 15 ns tAA for cycle-accurate register shadowing. Use Value: Eliminates DMA arbitration overhead and guarantees sub-20 ns read-to-data-valid timing under worst-case temperature and voltage conditions. |
Use Scenario: Frame header caching in E1/T1 framer modules where bursty packet metadata must be retained across clock domain boundaries. IC Role / Device Role / Timing Role: Dual-port-capable SRAM used as ping-pong buffer with BLE/BHE enabling concurrent header write and payload read via time-multiplexed bus. Use Value: Enables 8-bit partial writes to update checksum fields without disturbing adjacent header bytes - reducing bus contention by 50% vs full-word updates. |
| Medical Imaging Front-End FIFO | Automotive Diagnostic Tool Memory |
Use Scenario: Pixel pipeline buffering in ultrasound beamformer boards where analog-to-digital samples arrive at fixed 20 MHz rates and require lossless capture. IC Role / Device Role / Timing Role: High-reliability SRAM acting as first-stage FIFO with CE-driven power gating between acquisition bursts. Use Value: 0.5 mA ISB2 current extends battery life in portable diagnostic units while maintaining instant wake-up and data coherency. |
Use Scenario: Non-volatile parameter storage in OBD-II scan tools that retain calibration tables and fault logs during vehicle ignition cycling. IC Role / Device Role / Timing Role: Retention-optimized SRAM backed by coin cell, leveraging 2.0 V VDR to maintain data through 12 V system brownouts. Use Value: Guarantees >10-year data retention at room temperature using CR2032 cell without charge-pump circuitry or EEPROM wear leveling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed parallel SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISSI IS61LV25616AL-15TQLI | Same 256K × 16 organization, 15 ns speed, but uses TSOP-44 package and lacks BLE/BHE - requires external byte-enable logic | Targeted at cost-sensitive consumer electronics; not qualified for industrial temp range (–40°C to +85°C) | Select when board space permits TSOP and system design already includes byte-mask logic |
| Cypress CY7C1041GN-15ZC | Pin-compatible drop-in replacement with identical SOJ-44 footprint and BLE/BHE support, but rated for industrial temperature (–40°C to +85°C) and higher ISB2 (6 mA) | Suitable for extended-temperature deployments such as base station radios and railway signaling hardware | Choose for new designs requiring extended temp qualification without layout change |
Compared with IS61LV25616AL-15TQLI, CY7C1041B-15ZC provides native byte-select capability and commercial-temp stability; versus CY7C1041GN-15ZC, it trades industrial rating for lower standby current (0.5 mA vs 6 mA), making it optimal for battery-constrained commercial systems.
Availability
CY7C1041B-15ZC is available at Aetrix Electronics and suitable for industrial PLC data buffering, legacy telecom line card cache, and medical imaging front-end FIFO applications requiring stable component supply and long-term obsolescence management.
Supply support for CY7C1041B-15ZC 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 logic solutions for industrial, automotive, and communications infrastructure markets.
The CY7C1041B series delivers high-speed, low-power parallel SRAMs optimized for deterministic timing in legacy embedded systems where pin compatibility and data retention under brownout conditions are critical.
FAQ
Is CY7C1041B-15ZC RoHS-compliant?
Yes. CY7C1041B-15ZC was manufactured with lead-free terminations and complies with EU RoHS Directive 2011/65/EU. The "ZC" suffix denotes RoHS-compliant SOJ packaging with matte tin plating, confirmed in Cypress's official product change notices dated 2004–2005.
Can CY7C1041B-15ZC operate at 3.3 V?
No. The device requires 5.0 V ± 0.5 V supply. Its internal regulator generates ~3.3 V for core logic, but VCC must be 5 V. Applying 3.3 V will prevent proper operation and violate Absolute Maximum Ratings - VOH and VOL specifications assume 5 V VCC.
What is the meaning of "L version" in data retention specs?
The "L" designation refers to the low-power variant of CY7C1041B, identified by part numbers ending in "L" (e.g., CY7C1041BL-15ZC). It achieves 0.5 mA ISB2 standby current and 2.0 V data retention, whereas standard versions specify 3 mA ISB2 and no guaranteed retention below 4.5 V.
Does CY7C1041B-15ZC support concurrent read/write operations?
No. It is a single-port asynchronous SRAM. Read and write cycles are mutually exclusive: WE must be HIGH for reads, LOW for writes. True concurrent access requires dual-port or QDR SRAM architectures not implemented in this device.
CY7C1041B-15ZC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 44-TSOP (0.400", 10.16mm Width)
- Packaging:
- Bag
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Asynchronous
- Memory Size:
- 4Mbit
- Memory Organization:
- 256K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 15ns
- Access Time:
- 15 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-TSOP II
CY7C1041B-15ZC FAQ
1.How can I place an order for CY7C1041B-15ZC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1041B-15ZC 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 CY7C1041B-15ZC reliable?
The price and inventory of CY7C1041B-15ZC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1041B-15ZC is usually 5 days.
3.What payment methods are accepted for CY7C1041B-15ZC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1041B-15ZC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1041B-15ZC?
CY7C1041B-15ZC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1041B-15ZC 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 CY7C1041B-15ZC?
For technical support, including CY7C1041B-15ZC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1041B-15ZC requirements.
6.How does Aetrix verify that CY7C1041B-15ZC is sourced from the original manufacturer or authorized distributors?
All CY7C1041B-15ZC 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 CY7C1041B-15ZC meets industry standards.
7.What is the process for return or replacement of CY7C1041B-15ZC?
All CY7C1041B-15ZC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1041B-15ZC, 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 CY7C1041B-15ZC part is unused and in its original packaging.
Return procedure for CY7C1041B-15ZC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY7C1041B-15ZC Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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M24C02-FMC6TG
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