Analog Devices Inc. AD9554-1BCPZ-REEL7

Overview

AD9554-1BCPZ-REEL7 from Analog Devices is a quad-input, quad-output adaptive clock translator IC with four digital PLLs (DPLLs) for jitter cleanup and synchronization in telecom timing systems. It supports Stratum 3 holdover stability, ITU-T G.8262 SyncE slave operation, and SONET/SDH OC-192 compliance. Input reference range spans 2 kHz–1000 MHz; output frequency range is 430 kHz–941 MHz; loop bandwidth is programmable from 0.1 Hz to 4 kHz.

For engineers reviewing the AD9554-1BCPZ-REEL7 datasheet, AD9554-1BCPZ-REEL7 pinout, AD9554-1BCPZ-REEL7 application, or AD9554-1BCPZ-REEL7 equivalent, this device serves as a high-precision, multi-reference clock translator for synchronous Ethernet, OTN mapping/demapping, and Stratum 3 holdover-critical infrastructure where phase transient control and reference switchover integrity are mandatory.

Technical Context

The AD9554-1BCPZ-REEL7 implements a hybrid architecture with four independent DPLL cores feeding four analog PLLs (APLLs), each driving one differential output pair. Each DPLL accepts any of four reference inputs via a 4×4 crosspoint switch and features 20-bit input dividers, 18-bit integer + 24-bit fractional feedback dividers, and programmable loop bandwidths down to 0.1 Hz.

Reference validation operates at ±2 ppm accuracy; holdover maintains GR-1244 Stratum 3 stability; output drivers support HCSL, LVDS-compatible, or LVPECL-compatible signaling. The device uses a 56-lead 8 mm × 8 mm LFCSP package and operates across −40°C to +85°C.

Key Specifications

Pinout & Package

AD9554-1BCPZ-REEL7 is housed in a 56-lead, 8 mm × 8 mm LFCSP (Lead Frame Chip Scale Package) with exposed thermal pad. Pin functions include four reference inputs (REF_A to REF_D), four differential clock outputs (CLK0_P/N to CLK3_P/N), system clock inputs (XOA/XOB), serial interface pins (SCLK, SDIO, CSB for SPI; SCL, SDA for I²C), and multifunction control/status pins (M0–M3, M5–M7, IRQ).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar adaptive clock translation applications.

Compared with AD9554-1BCPZ-REEL7, AD9557BCPZ-REEL7 reduces channel count and holdover capability for cost-sensitive edge nodes, while Si5342-D-A01547-GM trades telecom certification for higher integration and simpler layout-neither matches AD9554-1BCPZ-REEL7's combination of quad-DPLL adaptability, Stratum 3 holdover, and GR-253-compliant phase transient control.

Availability

AD9554-1BCPZ-REEL7 is available at Aetrix Electronics and suitable for synchronous Ethernet infrastructure, OTN mapping/demapping systems, Stratum 3 holdover nodes, and cable access network timing requiring stable component supply across long-lifecycle telecom deployments.

Supply support for AD9554-1BCPZ-REEL7 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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and communications markets since 1965.

The AD9554 product line delivers adaptive clock translation ICs engineered specifically for carrier-grade telecom synchronization-enabling jitter cleanup, reference switchover, and holdover in synchronous Ethernet, SDH, and OTN infrastructure.

FAQ

What telecom standards does the AD9554-1BCPZ-REEL7 comply with?

The AD9554-1BCPZ-REEL7 complies with ITU-T G.8262 (SyncE slave clocks), Telcordia GR-253 (SONET/SDH jitter generation, transfer, and tolerance up to OC-192), and ITU-T G.823/G.824/G.825/G.8261. It also meets GR-1244 Stratum 3 holdover stability requirements. These certifications are verified in the official Analog Devices AD9554-1 datasheet Rev. C, pages 1 and 14–15.

Does AD9554-1BCPZ-REEL7 support automatic reference switchover without phase disruption?

Yes, AD9554-1BCPZ-REEL7 supports smooth automatic reference switchover with ≤±130 ps peak phase perturbation at 50 Hz loop bandwidth, satisfying Telcordia GR-1244-CORE requirements. This is achieved via phase build-out control and real-time DPLL re-locking-documented in Table 7 and Figure 22 of the AD9554-1 datasheet Rev. C.

What is the maximum output frequency supported by AD9554-1BCPZ-REEL7?

AD9554-1BCPZ-REEL7 supports a maximum output frequency of 941 MHz when all four PLLs use unique VCO frequencies. Individual PLLs can reach 1250 MHz (PLL0–PLL2) or 1187 MHz (PLL3), but simultaneous operation at those frequencies is limited by VCO sharing constraints-specified in Table 8, page 9 of the AD9554-1 datasheet Rev. C.

Can AD9554-1BCPZ-REEL7 operate with single-ended reference inputs?

Yes, AD9554-1BCPZ-REEL7 accepts single-ended CMOS reference inputs from 2 kHz to 300 MHz, with VIH = VDD − 0.5 V and VIL = 0.5 V. Input resistance is 30 kΩ and capacitance is 5 pF per pin-detailed in Table 5, page 7 of the AD9554-1 datasheet Rev. C.

What package type and thermal characteristics does AD9554-1BCPZ-REEL7 use?

AD9554-1BCPZ-REEL7 uses a 56-lead, 8 mm × 8 mm LFCSP package with exposed thermal pad. Its thermal resistance θJA is 26.5°C/W (JEDEC standard board), and it operates across −40°C to +85°C industrial temperature range-confirmed in the Outline Dimensions section (page 99) and Thermal Performance section (page 51) of the AD9554-1 datasheet Rev. C.