NXP Semiconductors CBTV4020EE/G,118

Overview

CBTV4020EE/G,118 from NXP Semiconductors is a 20-bit DDR SDRAM 2:1 multiplexer bus switch optimized for 2.3 V to 2.7 V operation with SSTL_2-compatible SEL input. It provides 20 Ω nominal ON-resistance, 100 Ω internal DIMM-side pull-down resistors, <50 ps output skew, and supports 400 Mbit/s DDR data buses in dual-bank memory modules.

For engineers reviewing the CBTV4020EE/G,118 datasheet, CBTV4020EE/G,118 pinout, CBTV4020EE/G,118 application, or CBTV4020EE/G,118 equivalent, this device serves as a high-speed, low-skew signal routing solution for DDR SDRAM DIMM selection in server, workstation, and high-performance computing memory subsystems.

Technical Context

The CBTV4020EE/G,118 implements a single SEL-controlled 2:1 multiplexing architecture across 20 independent data paths, with each path featuring matched rise/fall slew rates and low crosstalk design. Its internal 100 Ω pull-down on disabled DIMM ports ensures stable termination without external components.

It operates within a 0 °C to +85 °C ambient range and uses a TFBGA72 package with 72 solder balls. The 20 Ω RON and 7 pF node capacitance yield a 140 ps typical propagation delay, validated under 2.5 V supply and 7 pF load conditions.

Key Specifications

Pinout & Package

CBTV4020EE/G,118 is housed in a plastic thin fine-pitch ball grid array (TFBGA72) package measuring 6 × 6 × 0.8 mm with 72 I/O balls per SOT761-1 outline.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar DDR SDRAM multiplexer applications.

Compared with NB7L14M and PI3CH4020, the CBTV4020EE/G,118 uniquely integrates DDR-specific features-including SSTL_2 input compatibility, on-die 100 Ω DIMM termination, and <50 ps skew-making it the only drop-in solution for DDR-200 20-bit DIMM selection without redesigning termination or level-shifting circuitry.

Availability

CBTV4020EE/G,118 is available at Aetrix Electronics and suitable for server memory subsystems, workstation DDR expansion modules, and industrial embedded memory interfaces requiring stable component supply, long lifecycle support, and JEDEC-compliant DDR signal integrity.

Supply support for CBTV4020EE/G,118 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

NXP Semiconductors is a global semiconductor company specializing in secure connectivity solutions for automotive, industrial, and communication applications, with core expertise in high-speed interface ICs and memory subsystem components.

The CBTV4020EE/G,118 belongs to NXP's DDR interface switch product line, engineered specifically for high-reliability, low-skew signal routing in DDR SDRAM memory systems operating at 200 MHz and beyond.

FAQ

What is the primary function of the CBTV4020EE/G,118 in a DDR memory system?

The CBTV4020EE/G,118 functions as a 20-bit 2:1 multiplexer that routes DDR data signals between a memory controller and one of two DIMM banks (A or B) based on the SEL input state. It provides 20 Ω ON-resistance, integrated 100 Ω pull-down on inactive ports, and <50 ps output skew-enabling JEDEC-compliant DDR-200 operation without external termination components. This makes CBTV4020EE/G,118 ideal for dual-rank memory module selection in servers and workstations.

Does the CBTV4020EE/G,118 require external termination resistors for DDR applications?

No, the CBTV4020EE/G,118 does not require external termination resistors for DDR applications. Each DIMM-side port (DA0–DA19 and DB0–DB19) includes an internal 100 Ω pull-down resistor to GND when disabled, satisfying DDR stub termination requirements. Combined with its 20 Ω ON-resistance, CBTV4020EE/G,118 eliminates the need for eight discrete 100 Ω resistors per DIMM side and external series resistors on data lines-reducing BOM count and PCB area.

What is the operating voltage range and temperature specification for the CBTV4020EE/G,118?

The CBTV4020EE/G,118 operates from 2.3 V to 2.7 V VDD and is characterized for ambient temperatures from 0 °C to +85 °C. Its SSTL_2-compatible SEL input accepts VIH ≥ 1.6 V and VIL ≤ 0.9 V, ensuring direct interfacing with standard DDR memory controllers. All electrical parameters-including RON (16–30 Ω), tPD (140 ps typ), and tsk(o) (<50 ps)-are guaranteed across this full operating range, making CBTV4020EE/G,118 suitable for thermally demanding server and industrial environments.

How does the CBTV4020EE/G,118 manage signal integrity in high-speed DDR data paths?

The CBTV4020EE/G,118 maintains DDR signal integrity through matched rise/fall slew rates, <50 ps differential output skew, and low crosstalk design. Its 20 Ω RON minimizes reflections on 50 Ω DDR traces, while the 7 pF node capacitance yields a 140 ps propagation delay-well within DDR-200 timing budgets. The integrated 100 Ω pull-down on disabled DIMM ports suppresses stub resonance, and the TFBGA72 package's eight ground balls ensure low-inductance return paths. These features collectively preserve data eye width and meet JEDEC DDR timing margins for CBTV4020EE/G,118 deployments.

Is the CBTV4020EE/G,118 pin-compatible with other NXP DDR switch devices?

No, the CBTV4020EE/G,118 is not pin-compatible with other NXP DDR switch devices such as CBTL02043 or CBTL04083. It uses a unique 72-ball TFBGA72 (SOT761-1) footprint with dedicated DH/DA/DB signal mapping and eight ground balls distributed across the array. Pin assignments-including DH0 at F2, SEL at E3, and VDD at E8/F3/F8-are specific to CBTV4020EE/G,118 and differ from alternate packages like TSSOP or QFN used in other NXP DDR switches. Migration requires PCB layout revision.