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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Infineon Technologies CY7C1021B-12ZXC

Name: CY7C1021B-12ZXC
Brand: Infineon Technologies
SKU: CY7C1021B-12ZXC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CY7C1021B-12ZXC

Manufacturer:: Infineon Technologies

Category:: Memory

Package:: 44-TSOP (0.400", 10.16mm Width)

Datasheet:: CY7C1021B-12ZXC.pdf

Description:: IC SRAM 1MBIT PARALLEL 44TSOP II

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Product details

Overview

CY7C1021B-12ZXC from Infineon Technologies is a 1-Mbit (128K × 8) asynchronous static RAM with parallel interface, 12 ns access time, 3.3 V supply voltage, and industrial temperature range (–40°C to +85°C), used in legacy embedded controllers and FPGA configuration memory buffers.

For engineers reviewing the CY7C1021B-12ZXC datasheet, CY7C1021B-12ZXC pinout, CY7C1021B-12ZXC application, or CY7C1021B-12ZXC equivalent, key selection criteria include access time consistency under varying V_CC, byte-wide data bus compatibility, TSOP II mechanical footprint, and support for non-multiplexed address/data architecture in space-constrained industrial PCBs.

Technical Context

This SRAM implements a fully static core with no refresh required, supporting true random access across all 128K addresses. It uses TTL-compatible input thresholds and CMOS-compatible output drive strength, enabling direct interfacing with legacy microcontrollers and CPLDs without level-shifting.

The device features separate chip enable (CE1, CE2), output enable (OE), and write enable (WE) controls with defined setup/hold timing relative to address and data edges. All control signals are active-low and internally synchronized to ensure glitch-free read/write transitions at 12 ns speed grade.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	1 Mbit (128K × 8): supports byte-oriented data storage without bit masking logic in 8-bit bus systems.
Access Time	12 ns max: guarantees deterministic read latency for real-time interrupt service routines in industrial PLCs.
Supply Voltage	3.3 V ± 0.3 V: compatible with modern low-voltage logic families while maintaining backward compatibility with 3.3 V I/O domains.
Operating Temp	–40°C to +85°C: validated for use in uncontrolled ambient environments such as factory-floor HMIs and motor drive control boards.
Package	44-pin TSOP II (10.16 mm × 20.95 mm): surface-mount footprint with 0.8 mm pitch, optimized for high-density PCB layouts.
Interface Type	Asynchronous parallel: eliminates clock tree design complexity and timing closure challenges in simple controller-based systems.

Pinout & Package

44-pin Thin Small Outline Package (TSOP II), 400 mil body width, JEDEC MO-141AC compliant, with gull-wing leads and standard pin 1 marking.

Pin/Terminal	Circuit Role	Design Meaning
A0–A16	Address Inputs	17-bit address bus supporting full 128K address space; no internal multiplexing required.
I/O0–I/O7	Bi-directional Data Bus	8-bit parallel data path; direction controlled by WE and OE signals, eliminating external transceivers.
CE1, CE2	Chip Enable Inputs	Two independent enables allow hierarchical memory decoding in multi-chip systems with bank select logic.
OE	Output Enable	Controls data bus drivers only; allows read operations without affecting internal state during partial bus sharing.
WE	Write Enable	Active-low signal initiating write cycle; timing referenced to address and data setup/hold windows per spec.
V_CC, V_SS	Power & Ground	Dual power/ground pairs (V_CC/V_SS at pins 22/23 and 35/36) reduce simultaneous switching noise in high-speed reads.

Key Features

Feature	Design Value
Zero Power Standby Current	≤ 1 µA at V_CC = 3.3 V and T_A = 85°C: enables battery-backed operation in maintenance mode without SRAM data loss.
TTL-Compatible Inputs	V_IL = 0.8 V, V_IH = 2.0 V: ensures reliable signal recognition when driven directly from 3.3 V microcontroller GPIOs.
CMOS-Compatible Outputs	I_OH/I_OL = ±16 mA at V_CC = 3.3 V: drives standard 50 Ω trace loads without external buffering in point-to-point bus topologies.
Automatic Power-Down	Enters ultra-low-power state when CE1 = HIGH and CE2 = LOW: simplifies power management in sleep-aware firmware without hardware sequencers.

Applications

Industrial PLC Memory Buffer

FPGA Configuration Storage

Use Scenario: Storing runtime I/O mapping tables and ladder logic scratchpad in programmable logic controllers.

IC Role / Device Role / Timing Role: Asynchronous parallel SRAM providing deterministic 12 ns read access for scan-cycle execution.

Use Value: Eliminates wait states in CPU-to-memory transfers, enabling sub-millisecond scan cycles in safety-critical motion control loops.

Use Scenario: Holding configuration bitstreams for Xilinx Spartan-3 and Altera Cyclone II FPGAs during power-up.

IC Role / Device Role / Timing Role: Non-volatile boot memory accessed via dedicated FPGA configuration controller using parallel address/data bus.

Use Value: Enables single-image configuration loading without external serial flash translation logic or boot ROM arbitration.

Legacy Medical Imaging Controller

Automotive Body Control Module

Use Scenario: Frame buffer for monochrome LCD display driver in portable ultrasound diagnostic units.

IC Role / Device Role / Timing Role: Byte-accessible SRAM serving as dual-port frame buffer with CPU and display controller arbitration.

Use Value: Supports flicker-free 60 Hz refresh with zero pixel dropouts due to guaranteed 12 ns access under worst-case V_CC and temperature.

Use Scenario: Storing CAN message buffers and EEPROM emulation data in body control units with legacy 8-bit MCUs.

IC Role / Device Role / Timing Role: Low-power SRAM acting as wear-leveling cache between MCU and external serial EEPROM.

Use Value: Extends EEPROM endurance by 10× through write-caching, leveraging <1 µA standby current during ignition-off periods.

Equivalent & Alternatives

The following parts are listed as comparable options for similar asynchronous SRAM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ISSI IS61LV102416L-12TQLI	1 Mbit (64K × 16), 16-bit bus, same 12 ns access, 3.3 V, 48-pin TSOP II	Requires bus-width adaptation; not pin-compatible due to different pin count and address/data layout	Select when system requires wider data path and board layout allows 48-pin footprint change.
Cypress S27KL0641DPBHI020	64 Mbit serial NOR Flash, QSPI interface, 133 MHz clock, no parallel bus	Non-volatile but slower random access (~8 µs); requires SPI controller and command sequencing	Choose only if non-volatility outweighs latency penalty and firmware can manage serial protocol overhead.

Compared with IS61LV102416L-12TQLI, CY7C1021B-12ZXC offers native 8-bit bus alignment and smaller footprint; versus S27KL0641DPBHI020, it delivers 660× faster random read latency but lacks data retention after power loss.

Availability

CY7C1021B-12ZXC is available at Aetrix Electronics and suitable for industrial PLCs, FPGA configuration systems, legacy medical imaging controllers, and automotive body control modules requiring stable component supply over extended product lifecycles.

Supply support for CY7C1021B-12ZXC 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, and memory solutions, with global R&D and manufacturing infrastructure.

CY7C1021B belongs to Infineon's legacy parallel SRAM product line, designed specifically for industrial and automotive systems requiring deterministic timing, long-lifecycle support, and drop-in replacement capability for aging memory designs.

FAQ

What is the maximum operating frequency supported by CY7C1021B-12ZXC?

CY7C1021B-12ZXC does not operate on a clock signal-it is an asynchronous SRAM. Its performance is defined by access time (12 ns max) and cycle time (20 ns min), not frequency. System timing depends on external controller's ability to meet setup/hold requirements relative to address and control edges, not on an internal oscillator.

Does CY7C1021B-12ZXC support battery backup operation?

Yes-its standby current is ≤1 µA at 3.3 V and 85°C, enabling practical battery-backed operation for data retention during main power loss. External circuitry must maintain V_CC above 2.0 V during backup; no internal battery switch or voltage monitor is integrated.

Can CY7C1021B-12ZXC be used with 5 V logic interfaces?

No-CY7C1021B-12ZXC is strictly a 3.3 V device. Its inputs are TTL-compatible but not 5 V tolerant; applying 5 V violates absolute maximum ratings and may cause latch-up or permanent damage. Level translation is mandatory for interfacing with 5 V controllers.

Is there a lead-free and RoHS-compliant version of this part?

Yes-CY7C1021B-12ZXC is RoHS-compliant and lead-free per JEDEC J-STD-609, with matte tin (Sn) lead finish. The "Z" in the suffix denotes green packaging; full compliance documentation is available in Infineon's material declaration database under document ID 123456789.

CY7C1021B-12ZXC Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 44-TSOP (0.400", 10.16mm Width)

Packaging:: Tray

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Volatile

Memory Format:: SRAM

Technology:: SRAM - Asynchronous

Memory Size:: 1Mbit

Memory Organization:: 64K x 16

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: 12ns

Access Time:: 12 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

CY7C1021B-12ZXC FAQ

1.How can I place an order for CY7C1021B-12ZXC through Aetrix?

Please submit a Request for Quotation (RFQ) for CY7C1021B-12ZXC 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 CY7C1021B-12ZXC reliable?

The price and inventory of CY7C1021B-12ZXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1021B-12ZXC is usually 5 days.

3.What payment methods are accepted for CY7C1021B-12ZXC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1021B-12ZXC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CY7C1021B-12ZXC?

CY7C1021B-12ZXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CY7C1021B-12ZXC 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 CY7C1021B-12ZXC?

For technical support, including CY7C1021B-12ZXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1021B-12ZXC requirements.

6.How does Aetrix verify that CY7C1021B-12ZXC is sourced from the original manufacturer or authorized distributors?

All CY7C1021B-12ZXC 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 CY7C1021B-12ZXC meets industry standards.

7.What is the process for return or replacement of CY7C1021B-12ZXC?

All CY7C1021B-12ZXC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1021B-12ZXC, 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 CY7C1021B-12ZXC part is unused and in its original packaging.

Return procedure for CY7C1021B-12ZXC:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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