Infineon Technologies CY62167G-45ZXIT

Overview

CY62167G-45ZXIT from Infineon Technologies (formerly Cypress) is a 16-Mbit MoBL® low-power SRAM with embedded single-bit error-correcting code (ECC), configurable as 1M × 16 or 2M × 8, operating at 45 ns access time over 4.5–5.5 V supply, and featuring TTL-compatible I/Os, ERR pin for error indication, and Byte Power-down mode. It serves in industrial control memory buffers requiring data integrity and ultra-low standby current.

For engineers reviewing the CY62167G-45ZXIT datasheet, CY62167G-45ZXIT pinout, CY62167G-45ZXIT application, or CY62167G-45ZXIT equivalent, this page delivers verified package mapping (48-pin TSOP I), ECC functional behavior, byte-enable control logic, voltage-range-specific timing, and real-world use cases in fault-tolerant embedded systems.

Technical Context

This SRAM integrates dedicated ECC encode/decode circuitry that detects and corrects single-bit errors on every read cycle without external logic. Its dual chip enable (CE1/CE2) and byte enable (BHE/BLE) architecture supports flexible memory partitioning and partial-word writes while maintaining full addressability across both 1M×16 and 2M×8 configurations.

The device implements Byte Power-down: when both BHE and BLE are deasserted, it enters standby mode regardless of CE state-enabling dynamic power gating per access granularity. The ERR output (active-high) signals correction events only on CY62167GE variants; CY62167G lacks this pin, confirming CY62167G-45ZXIT is the ECC-enabled GE variant per ordering code "Z" (TSOP I, Industrial temp, Pb-free).

Key Specifications

Pinout & Package

Package: 48-pin TSOP I (Type I, 12 mm × 20 mm), Pb-free, Industrial temperature grade. Pinout matches Figure 6 in datasheet Rev. *R: Dual CE (CE1/CE2), ERR output, BYTE pin for configuration (VCC = 1M×16, VSS = 2M×8), A0–A19 + A20 (in 2M×8 mode), I/O0–I/O15, BHE/BLE, WE/OE.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS61WV102416BLL-10MLI and AS6C1008-55PCN, CY62167G-45ZXIT uniquely delivers integrated ECC, 45 ns speed at 5 V, and automatic byte-triggered standby - making it the sole option for industrial systems requiring certified data integrity without firmware or external hardware overhead.

Availability

CY62167G-45ZXIT is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostic loggers, avionics health monitors, and automated test equipment requiring stable component supply, long-term lifecycle support, and guaranteed ECC functionality.

Supply support for CY62167G-45ZXIT 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 acquired Cypress Semiconductor in 2020 and maintains its SRAM portfolio under the MoBL® (Mobile Bit-Low-power) brand, emphasizing ultra-low power, industrial reliability, and embedded system integration.

CY62167G-45ZXIT belongs to the MoBL® SRAM product line, designed specifically for mission-critical embedded applications where data integrity, low standby power, and 5-V compatibility cannot be compromised.

FAQ

Does CY62167G-45ZXIT support automatic error correction without host intervention?

Yes. The device performs single-bit error detection and correction autonomously on every read cycle using on-die ECC circuitry. No host software or external logic is required. The ERR pin asserts high during correction, providing observable feedback, but correction occurs transparently regardless of ERR usage.

Can CY62167G-45ZXIT operate in 2M × 8 mode on a 16-bit data bus?

No. In 2M × 8 mode (BYTE = VSS), pins BHE, BLE, and I/O8–I/O14 are unused and must be left floating. Only I/O0–I/O7 are active, and A20 becomes valid on pin 45. Using it on a 16-bit bus would require external demultiplexing or redesign - the part is intended for native 8-bit or 16-bit interfaces, not mixed-mode operation.

What is the role of the BYTE pin, and how does it affect address mapping?

The BYTE pin configures internal address decoding: tied to VCC, it enables 1M × 16 mode (A0–A19 used, 20-bit address); tied to VSS, it enables 2M × 8 mode (A0–A20 used, 21-bit address). In the latter, pin 45 becomes A20, and the upper byte I/Os become inactive - no remapping of existing pins occurs beyond this functional shift.

Is the 45 ns access time guaranteed across the full industrial temperature range?

Yes. The 45 ns specification applies over –40 °C to +85 °C at VCC = 4.5–5.5 V, as confirmed in the "Switching Characteristics" table (page 11) of datasheet 001-81537 Rev. *R. This is a maximum limit - typical access is faster, but design timing margins must use the 45 ns worst-case value.