Analog Devices Inc./Maxim Integrated MAX14548EEWL+T

Overview

MAX14548EEWL+T from Maxim Integrated is a 16-channel bidirectional level translator IC designed for high-speed voltage-level shifting between low-voltage logic domains (VL = +1.1V to +3.6V) and higher-voltage domains (VCC = +1.7V to +3.6V). It guarantees 100Mbps data transfer with <15pF load capacitance when PF is low, supports 40Mbps at up to 50pF when PF is high, and features programmable frequency control, internal 35µA pull-up current sources, and automatic shutdown when VCC < VL - enabling robust interfacing in portable communication devices and smart card readers.

For engineers reviewing the MAX14548EEWL+T datasheet, MAX14548EEWL+T pinout, MAX14548EEWL+T application, or MAX14548EEWL+T equivalent, key selection considerations include guaranteed 100Mbps timing under 15pF load, VL > 1.1V requirement for full-speed operation, WLP package footprint constraints, EN-controlled shutdown behavior, and compatibility with both push-pull and open-drain drivers without external pull-ups.

Technical Context

The MAX14548EEWL+T implements an nMOS pass-gate architecture with edge-triggered output accelerator stages that generate short pulses to charge/discharge I/O capacitances during signal transitions - enabling sub-3ns propagation delays (tPVCC-VL = 2.26ns typ.) and 0.2ns channel-to-channel skew. Its dual-supply design isolates VL and VCC domains while maintaining bidirectional signal flow through internal current-source pull-ups (35µA per I/O), eliminating need for external resistors.

Operation requires VL ≤ VCC during normal use, with automatic shutdown triggered when VCC falls below VL by >0.3V (threshold varies with VL); EN input provides explicit low-power control. The PF pin selects between two accelerator on-time modes: PF = low enables 100Mbps mode (2.5–2.65ns pulse width), PF = high configures 40Mbps mode (3.7–4ns pulse width), optimizing speed vs. dynamic current trade-off.

Key Specifications

Pinout & Package

MAX14548EEWL+T is housed in a 40-bump Wafer-Level Package (WLP) measuring 2.16mm × 3.46mm with 0.4mm ball pitch - optimized for space-constrained portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX14548AEWL+T and TXB0108RGTR, the MAX14548EEWL+T uniquely supports 100Mbps operation down to VL = 1.1V while offering programmable speed control and the highest channel density (16) in a WLP - making it optimal for space-constrained, multi-signal, low-voltage portable designs requiring guaranteed timing margins.

Availability

MAX14548EEWL+T is available at Aetrix Electronics and suitable for portable communication devices, smart card readers, and low-voltage ASIC interfacing requiring stable component supply, long-term production continuity, and RoHS-compliant packaging.

Supply support for MAX14548EEWL+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 precision analog, mixed-signal, and high-reliability ICs for industrial, communications, and consumer applications.

The MAX14548E product line delivers ultra-small, high-speed bidirectional level translators targeting space- and power-sensitive portable electronics - specifically engineered to replace discrete resistor networks and reduce interface complexity in multivoltage SoC systems.

FAQ

What is the minimum VL voltage required for 100Mbps operation of the MAX14548EEWL+T?

The MAX14548EEWL+T requires VL > 1.1V to guarantee 100Mbps data rate when PF is driven low and load capacitance is less than 15pF. This threshold is explicitly specified in the datasheet's Electrical Characteristics table and distinguishes it from the MAX14548AEWL+T, which requires VL > 1.4V for the same performance. Operating below 1.1V at PF = low may result in timing violations or reduced reliability.

Does the MAX14548EEWL+T require external pull-up resistors on its I/O lines?

No, the MAX14548EEWL+T does not require external pull-up resistors. Each I/O channel includes an internal 35µA current-source pull-up referenced to either VL or VCC, enabling direct interface with both push-pull and open-drain drivers. Adding external resistors is discouraged as it degrades rise/fall time performance and may cause contention with the internal current sources.

How does the EN pin affect the I/O states of the MAX14548EEWL+T during shutdown?

When EN is driven low, the MAX14548EEWL+T enters low-power shutdown mode: both I/O VCC_ and I/O VL_ terminals enter a high-impedance state, and supply currents drop to ≤1µA per rail. This behavior is confirmed in the Absolute Maximum Ratings and Electrical Characteristics sections, ensuring no signal leakage or back-driving during system sleep or power-down sequences.

Can the MAX14548EEWL+T translate signals when VCC is powered but VL is unpowered?

No - the MAX14548EEWL+T automatically disables translation and places all I/Os in high-impedance state when VCC < VL, including cases where VL is unpowered (0V) and VCC is active. This is enforced by the VL–VCC shutdown threshold circuitry (VTH_L = 0.2–0.85V), preventing unintended current flow or logic contention. Both supplies must be within valid ranges and satisfy VCC > VL for normal operation.

What is the maximum capacitive load the MAX14548EEWL+T can drive at 40Mbps?

The MAX14548EEWL+T guarantees reliable 40Mbps operation with capacitive loads up to 50pF on each I/O line when PF is driven high and VL > 1.1V. This capability is validated in the Low-Speed Timing Characteristics table and supported by typical operating curves showing rise/fall times and propagation delay stability up to 50pF - making it suitable for longer traces or multi-drop configurations where parasitic capacitance exceeds 15pF.