Analog Devices Inc./Maxim Integrated MAX13035EETE+T

Overview

The MAX13035EETE+T from Maxim Integrated is a 6-channel bidirectional logic-level translator IC designed for high-speed voltage translation between +1.62V–+3.2V (VL) and +2.2V–+3.6V (VCC) domains. It supports guaranteed 100Mbps data transfer, features a dedicated CLK_RET output that mirrors CLK_VL, and operates across –40°C to +85°C. It is used in SD/MiniSD/MMC memory card interfaces where precise level shifting between low-voltage controllers and 3.3V peripherals is required.

For engineers reviewing the MAX13035EETE+T datasheet, MAX13035EETE+T pinout, MAX13035EETE+T application, or MAX13035EETE+T equivalent, key selection criteria include its 6-channel bidirectional architecture, CLK_RET functionality, ±15kV I/O ESD protection, shutdown behavior under VL > VCC, and compatibility with 4mA input drivers - all critical for robust memory-card interface design.

Technical Context

The MAX13035EETE+T uses an nMOS pass-gate architecture with integrated rise/fall-time accelerator stages that activate only during signal transitions, minimizing static current while enabling sub-3ns edge acceleration. Its dual-supply operation (VL and VCC) allows independent logic-level referencing per side, with internal 30µA pullup current sources on all I/O lines supporting both push-pull and open-drain drivers without external resistors.

Unlike the MAX13030E–MAX13034E variants, the MAX13035EETE+T omits the EN pin and instead relies solely on automatic shutdown when VL exceeds VCC by >0.7V. Its dedicated CLK_RET output is internally tied to the VL domain and replicates CLK_VL with matched propagation delay (8ns max), making it suitable for clock-forwarding applications in memory-card host controllers.

Key Specifications

Pinout & Package

MAX13035EETE+T is supplied in a lead-free 16-pin TQFN-EP package (4mm × 4mm, 0.5mm pitch) with exposed paddle thermally and electrically connected to GND. The package supports reflow soldering up to +235°C bump temperature and offers 2000mW continuous power dissipation at +70°C ambient.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 6-channel bidirectional level translation applications.

Compared with MAX13030EETE+ and TXB0106RGYR, the MAX13035EETE+T uniquely delivers CLK_RET functionality with matched propagation delay and ±15kV HBM protection - making it the only option qualified for robust, high-speed SD/SDIO host interfaces requiring clock feedback and industrial-grade ESD immunity.

Availability

MAX13035EETE+T is available at Aetrix Electronics and suitable for SD card readers, embedded media controllers, portable instrumentation, and industrial memory-card interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX13035EETE+T 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

Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.

The MAX13030E–MAX13035E product line was designed specifically for high-speed, multivoltage memory-card interface translation - addressing timing-critical, ESD-sensitive applications in portable and embedded systems.

FAQ

What is the function of the CLK_RET pin on the MAX13035EETE+T?

The CLK_RET pin on the MAX13035EETE+T is a VL-referenced output that returns an exact replica of the signal applied to CLK_VL. It is not a buffered version but a direct mirror with matched propagation delay (≤8ns), enabling host controllers to monitor or synchronize with the SD card's clock domain without adding timing uncertainty. This feature is exclusive to the MAX13035E variant and is absent in other members of the MAX13030E–MAX13034E family.

Does the MAX13035EETE+T require an external enable signal?

No, the MAX13035EETE+T does not have an EN pin and does not require an external enable signal. It operates in automatic mode: enabled when VL ≤ VCC − 0.2V, and automatically entering low-power shutdown when VL exceeds VCC by more than 0.7V. This eliminates the need for GPIO control and simplifies power sequencing in SD card slot designs where VL (1.8V) may power up before or after VCC (3.3V).

Can the MAX13035EETE+T be used with open-drain drivers?

Yes, the MAX13035EETE+T is fully compatible with open-drain drivers on both VL and VCC sides. Its internal 30µA pullup current sources eliminate the need for external pullup resistors, and its output accelerator stages actively speed up rising edges - ensuring reliable 100Mbps operation even with high capacitive loads. This makes it ideal for I²C-like signaling in memory-card detection circuits where open-drain behavior is inherent.

What is the maximum capacitive load the MAX13035EETE+T can drive while maintaining 100Mbps operation?

The MAX13035EETE+T maintains guaranteed 100Mbps operation with ≤10pF load on I/O VCC_ lines and ≤15pF load on I/O VL_ lines when driven by a 150Ω source. Rise/fall times remain ≤2.5ns under these conditions. For higher loads, timing margins degrade: at 40pF, rise/fall time increases to ~840ps, and propagation delay rises to ~10ns - still usable for lower-speed SD modes but not guaranteed for full 100Mbps compliance.

How does the MAX13035EETE+T handle power sequencing where VL powers up before VCC?

When VL powers up before VCC, the MAX13035EETE+T automatically enters shutdown mode because VL > VCC + 0.7V triggers the internal threshold. In this state, all I/O VL_ and I/O VCC_ pins enter high-impedance mode (as confirmed in the Ordering Information table for MAX13035EETE/V+T), preventing bus contention or back-driving. Once VCC rises above VL + 0.7V, the device enables seamlessly - no reset or initialization sequence is required.