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

Infineon Technologies CY7C1020B-15ZXCT

Name: CY7C1020B-15ZXCT
Brand: Infineon Technologies
SKU: CY7C1020B-15ZXCT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CY7C1020B-15ZXCT

Manufacturer:: Infineon Technologies

Category:: Memory

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

Datasheet:: CY7C1020B-15ZXCT.pdf

Description:: IC SRAM 512KBIT PAR 44TSOP II

Quantity:: RFQ Add To RFQ list

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Product details

Overview

CY7C1020B-15ZXCT from Cypress Semiconductor is a 32K × 16-bit (512 Kbit) high-speed CMOS static RAM with 15 ns access time, 5 V supply, and automatic CE-controlled power-down. It supports independent byte-wide write enable via BHE/BLE pins and operates across commercial temperature range (0°C to +70°C) in a lead-free 44-pin TSOP II package. Used in embedded controllers and legacy industrial systems requiring deterministic SRAM timing.

For engineers reviewing the CY7C1020B-15ZXCT datasheet, CY7C1020B-15ZXCT pinout, CY7C1020B-15ZXCT application, or CY7C1020B-15ZXCT equivalent, key selection criteria include tAA = 15 ns read latency, ISB2 = 3 mA CMOS standby current, dual-byte write control, and TSOP II thermal resistance (ΘJA = 50.55°C/W).

Technical Context

The CY7C1020B-15ZXCT implements a fully decoded 15-bit address space (A0–A14) driving a 32K-word × 16-bit memory array with separate I/O1–I/O8 (lower byte) and I/O9–I/O16 (upper byte) data paths. Read/write operations are controlled by synchronous CE, OE, WE, BHE, and BLE signals with defined setup/hold and transition timing windows.

Its automatic power-down logic asserts high-impedance outputs and reduces ICC to ≤3 mA when CE is HIGH, independent of OE or WE state. The device uses standard TTL-compatible input thresholds (VIH = 2.2 V min, VIL = 0.8 V max) and drives LVTTL loads with VOH ≥ 2.4 V and VOL ≤ 0.4 V under specified IOL/IOH conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
tAA	15 ns maximum - defines worst-case delay from valid address to stable output data during read cycles
ISB2	3 mA max at VCC = 5.5 V - CMOS-mode standby current when CE > VCC – 0.3 V, enabling ultra-low-power deselected operation
VCC	5 V ±10% - single-supply operation compatible with legacy 5 V logic families and industrial power rails
Package	44-pin TSOP II (51-85087), 400-mil width - surface-mount footprint with ΘJA = 50.55°C/W for convection-cooled PCBs
Byte Control	BHE and BLE inputs enable independent upper/lower byte write - eliminates need for external byte masking logic
Output Drive	IOL = 8 mA / IOH = –4 mA - sufficient to directly drive 10 LVTTL loads without buffers in point-to-point configurations

Pinout & Package

44-pin TSOP Type II (51-85087), 400-mil body width, lead-free (RoHS-compliant) construction. Pin 1 marked by notch or dot; pins numbered counterclockwise from top-left corner.

Pin/Terminal	Circuit Role	Design Meaning
A0–A14	Address Inputs	15-bit row/column decode bus selecting one of 32,768 memory locations
I/O1–I/O8	Lower-Byte Bidirectional Data	8-bit data path active only when BLE = LOW during read/write
I/O9–I/O16	Upper-Byte Bidirectional Data	8-bit data path active only when BHE = LOW during read/write
CE	Chip Enable	Primary device select; HIGH forces automatic power-down and high-Z outputs
OE	Output Enable	Controls output drivers only; must be LOW with CE LOW for read access
WE	Write Enable	Active-LOW signal initiating write cycle when CE and BHE/BLE are also asserted
BLE	Byte Low Enable	Selects lower byte (I/O1–I/O8) for write/read; independent of BHE
BHE	Byte High Enable	Selects upper byte (I/O9–I/O16) for write/read; independent of BLE
VCC	Power Supply	5 V ±10% main supply; two dedicated pins (pins 16 and 32) reduce IR drop
VSS	Ground	Two ground pins (pins 15 and 31) provide low-inductance return path

Key Features

Feature	Design Value
Dual-byte write control	Independent BHE/BLE pins allow selective 8-bit writes without external gating or data masking logic
Automatic CE power-down	Reduces ICC to ≤3 mA (CMOS mode) when CE is deasserted - no software or external control required
Low-capacitance I/O	CIN/COUT = 8 pF max - minimizes signal integrity degradation and timing skew on dense PCB traces
TTL-compatible interface	VIH = 2.2 V min, VIL = 0.8 V max - ensures interoperability with legacy 5 V microcontrollers and FPGAs
TSOP II thermal performance	ΘJA = 50.55°C/W - enables reliable operation at full speed in enclosed industrial enclosures without forced air

Applications

Industrial PLC Memory Buffer

Legacy Microcontroller Data RAM

Use Scenario: Real-time I/O data buffering in programmable logic controllers with deterministic scan-cycle timing.

IC Role / Device Role / Timing Role: External data RAM providing zero-wait-state access for 8051- and Z80-based CPU cores.

Use Value: 15 ns tAA guarantees sub-66 MHz bus compatibility without wait-state insertion, preserving cycle-accurate execution.

Use Scenario: Off-chip RAM expansion for microcontrollers lacking integrated SRAM, such as early ARM7TDMI or ColdFire derivatives.

IC Role / Device Role / Timing Role: Synchronous parallel memory mapped at fixed address space with byte-select capability.

Use Value: Independent BHE/BLE enables efficient 8-bit peripheral register access while preserving 16-bit data throughput for bulk transfers.

Medical Instrument Data Logging

Avionics Display Controller Frame Buffer

Use Scenario: Temporary storage of sensor acquisition buffers in Class II medical devices operating under IEC 60601-1.

IC Role / Device Role / Timing Role: Non-volatile-critical scratchpad memory holding pre-processed waveform segments before EEPROM transfer.

Use Value: ISB2 = 3 mA standby current extends battery life during idle periods without compromising wake-up latency.

Use Scenario: Dual-port frame buffer for monochrome cockpit display controllers requiring flicker-free refresh.

IC Role / Device Role / Timing Role: Single-port SRAM accessed alternately by display controller (read) and host processor (write) using CE/OE arbitration.

Use Value: tHZOE = 7 ns and tLZOE = 0 ns ensure minimal bus turnaround gap between read and write phases, maximizing effective bandwidth.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ISSI IS61LV51216AL-15NLI	Same density and speed (15 ns), but 3.3 V only; LVCMOS I/O thresholds; no BHE/BLE byte control	Requires level-shifting for 5 V systems; lacks independent byte write - needs external logic for 8-bit access	Select only if migrating to 3.3 V architecture and redesigning address/data bus interface
Cypress CY7C1021DV33-15ZXC	512 Kbit × 16, 15 ns, 3.3 V supply; includes power-down mode but no BHE/BLE; different pinout (48-pin TSOPII)	Not pin-compatible; requires PCB redesign; incompatible voltage domain without translation	Consider only for new 3.3 V designs where legacy 5 V support is not required

Compared with IS61LV51216AL-15NLI and CY7C1021DV33-15ZXC, the CY7C1020B-15ZXCT uniquely retains 5 V operation, dual-byte write control, and TSOP II pinout-making it irreplaceable in field-deployed 5 V systems requiring minimal hardware change.

Availability

CY7C1020B-15ZXCT is available at Aetrix Electronics and suitable for industrial PLC memory buffers, legacy microcontroller data RAM expansion, and medical instrument data logging requiring stable component supply and long-term obsolescence management.

Supply support for CY7C1020B-15ZXCT 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 markets.

The CY7C1020B series delivers 5 V CMOS SRAMs optimized for deterministic timing in legacy control systems where compatibility with aging microarchitectures and board-level voltage rails is critical.

FAQ

Is CY7C1020B-15ZXCT compatible with 5 V TTL and CMOS logic families?

Yes. Its VIH minimum is 2.2 V and VIL maximum is 0.8 V, matching standard 5 V TTL thresholds. Output drive strength (IOL = 8 mA, IOH = –4 mA) meets LVTTL loading requirements, and the device operates at VCC = 5 V ±10%, ensuring direct interfacing with 8051, 68K, and Z80 families without level shifters.

What is the difference between ISB1 and ISB2 standby current specifications?

ISB1 (20 mA max) applies when CE > VIH using TTL-compatible input thresholds, while ISB2 (3 mA max) applies under stricter CMOS thresholds (CE > VCC – 0.3 V). ISB2 reflects true low-power deselected operation and is the relevant spec for energy-sensitive applications like battery-backed systems.

Can CY7C1020B-15ZXCT perform simultaneous upper- and lower-byte writes?

Yes. When both BHE and BLE are driven LOW concurrently with CE and WE, the device writes 16 bits in a single cycle. The truth table confirms "Write – All bits" mode is enabled when CE = L, WE = L, BHE = L, and BLE = L - no timing overlap restriction prevents concurrent assertion.

Does the TSOP II package support reflow soldering per J-STD-020?

Yes. As a RoHS-compliant lead-free device (denoted by 'X' in -ZXCT), it conforms to JEDEC J-STD-020D moisture sensitivity level 3 and withstands peak reflow temperatures up to 260°C for 30 seconds, compatible with standard Pb-free assembly processes.

CY7C1020B-15ZXCT Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Volatile

Memory Format:: SRAM

Technology:: SRAM - Asynchronous

Memory Size:: 512Kbit

Memory Organization:: 32K 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

CY7C1020B-15ZXCT FAQ

1.How can I place an order for CY7C1020B-15ZXCT through Aetrix?

Please submit a Request for Quotation (RFQ) for CY7C1020B-15ZXCT 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 CY7C1020B-15ZXCT reliable?

The price and inventory of CY7C1020B-15ZXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1020B-15ZXCT is usually 5 days.

3.What payment methods are accepted for CY7C1020B-15ZXCT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1020B-15ZXCT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CY7C1020B-15ZXCT?

CY7C1020B-15ZXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CY7C1020B-15ZXCT 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 CY7C1020B-15ZXCT?

For technical support, including CY7C1020B-15ZXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1020B-15ZXCT requirements.

6.How does Aetrix verify that CY7C1020B-15ZXCT is sourced from the original manufacturer or authorized distributors?

All CY7C1020B-15ZXCT 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 CY7C1020B-15ZXCT meets industry standards.

7.What is the process for return or replacement of CY7C1020B-15ZXCT?

All CY7C1020B-15ZXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1020B-15ZXCT, 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 CY7C1020B-15ZXCT part is unused and in its original packaging.

Return procedure for CY7C1020B-15ZXCT:

1.Submit a request within 90 days.

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

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