Infineon Technologies CG7600AA

Overview

CG7600AA from Cypress Semiconductor is a 18-Mbit DDR II SRAM with two-word burst architecture, configured as 1M × 18 (CY7C1318KV18), operating at 333 MHz clock frequency and delivering 666 MHz double-data-rate throughput. It uses synchronous pipelined read/write operations with 1.5-cycle read latency (DOFF = HIGH) or 1-cycle latency (DOFF = LOW), and features HSTL I/O compatible with 1.5 V or 1.8 V supply. It serves as high-bandwidth buffer memory in network packet processors and telecom line cards.

For engineers reviewing the CG7600AA datasheet, CG7600AA pinout, CG7600AA application, or CG7600AA equivalent, key selection criteria include DDR-II timing compliance, echo clock (CQ/CQ) support for skew-tolerant data capture, dual-input clock domain (K/K and C/C), 165-ball FBGA package compatibility, and JTAG 1149.1 test access capability.

Technical Context

This SRAM implements a synchronous, pipelined DDR-II interface with internal burst counter driven by A0, latching addresses on alternate rising edges of K/K clocks. Write data is registered on both K and K edges; read data is output synchronized to C/C (or K/K in single-clock mode), with echo clocks CQ/CQ phase-aligned to output data for controller-side capture.

The device integrates a PLL for precise data placement, supports programmable output impedance via ZQ calibration, and provides byte-write select (BWS0–BWS1) for granular 9-bit writes. It operates from a 1.8 V core supply with HSTL-compatible I/Os rated for 1.4 V–VDD output swing, enabling interoperability across mixed-voltage DDR systems.

Key Specifications

Pinout & Package

CG7600AA is housed in a 165-ball fine-pitch ball grid array (FBGA) package measuring 13 mm × 15 mm × 1.4 mm, RoHS-compliant and available in both Pb-free and non-Pb-free variants. Pin assignments follow the CY7C1318KV18 layout with 18-bit data bus (DQ[17:0]), dual input clocks (K/K), dual output clocks (C/C), echo clocks (CQ/CQ), and dedicated control signals including LD, R/W, and BWS0/BWS1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS45S16160J-6BLI and MT45W8MW16BGX-60D, CG7600AA uniquely combines true SRAM determinism, echo-clock–assisted data capture, and on-die impedance tuning-making it optimal for latency-critical, multi-device DDR-II memory subsystems where signal integrity and timing predictability are non-negotiable.

Availability

CG7600AA is available at Aetrix Electronics and suitable for network packet buffering, telecom line card memory, baseband processing cache, and radar signal preprocessing requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for CG7600AA 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) is a fabless semiconductor company specializing in high-performance memory, microcontrollers, and connectivity solutions for industrial, automotive, and communications markets.

CG7600AA belongs to Cypress's DDR-II SRAM product line, engineered specifically for deterministic, high-bandwidth buffering in telecom infrastructure and packet-processing systems where nanosecond-level timing control and signal integrity are critical.

FAQ

What is the function of the DOFF pin on CG7600AA?

The DOFF (Data Output OFF) pin selects read latency mode: when asserted HIGH, it enables DDR-II mode with 1.5-cycle read latency for improved timing margin; when LOW, it reverts to DDR-I–compatible 1-cycle latency. This pin is sampled synchronously on the rising edge of K and affects only read operations-not writes, burst length, or clocking architecture.

Can CG7600AA operate without external C and C clocks?

Yes-CG7600AA supports single-clock mode where K and K serve as both input and output clocks. In this mode, C and C are unused, CQ and CQ are generated relative to K/K, and data output timing references K/K edges. All functionality remains intact, though board-level deskew capability is lost without dedicated C/C pairs.

How does ZQ calibration work on CG7600AA?

ZQ calibration adjusts output driver impedance by comparing internal reference to an external precision resistor (RQ) tied between ZQ and GND. The device sets CQ, CQ, and DQ[17:0] output impedance to 0.2 × RQ. If ZQ is tied to VDDQ instead, minimum impedance mode activates. ZQ must never be left floating or connected to GND.

Is CG7600AA pin-compatible with CY7C1320KV18?

No-CG7600AA maps to CY7C1318KV18 (1M × 18), which uses 18-bit DQ[17:0] and BWS0/BWS1. CY7C1320KV18 is 512K × 36 with DQ[35:0] and BWS0–BWS3. Their FBGA pinouts differ significantly: e.g., DQ18–DQ35 and BWS2/BWS3 exist only on CY7C1320KV18, and address count differs (20 vs. 19 bits).