NXP Semiconductors UCB1400BE,151

Overview

UCB1400BE,151 from NXP Semiconductors (formerly Philips Semiconductors) is a single-chip stereo audio codec with integrated 4-wire resistive touch screen controller and power management monitor. It implements AC '97 Rev. 2.1 interface, features 20-bit stereo ADC/DAC, 10-bit SAR ADC for touch/power monitoring, and 10 GPIOs - all in a 48-pin LQFP package. It directly interfaces with Intel XScale™ host controllers and drives headphones without external amplification.

For engineers reviewing the UCB1400BE,151 datasheet, UCB1400BE,151 pinout, UCB1400BE,151 application, or UCB1400BE,151 equivalent, key selection considerations include AC '97 Rev. 2.1 compliance, simultaneous audio capture/playback at 48 kHz, 4-wire touch coordinate resolution, 7.5 V high-voltage monitoring capability, and low-power operation on 3.3 V supply.

Technical Context

The UCB1400BE,151 operates as an AC '97 primary codec only, deriving its 12.288 MHz BIT_CLK from an internal PLL locked to a 24.576 MHz crystal connected to XTL_IN/XTL_OUT. It supports programmable sample rates via variable-rate signaling and provides independent gain control for microphone, line-in, and headphone outputs.

Its analog subsystem includes dual 20-bit sigma-delta ADCs for stereo recording, dual 20-bit DACs with interpolation filters and noise shapers for playback, and a dedicated 10-bit successive-approximation ADC with track-and-hold and 4-channel analog multiplexer for touch plate resistance and external 7.5 V source monitoring.

Key Specifications

Pinout & Package

UCB1400BE,151 is housed in a 48-pin LQFP package (SOT313-2), with separate analog/digital power and ground domains, dedicated AC '97 interface pins, stereo audio I/O, 4-wire touch terminals, 4-channel analog input multiplexer (AD[3:0]), ADC synchronization (ADCSYNC), and 10 GPIOs (IO[9:0]).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar audio + touch controller applications.

Compared with AK4620VN and WM9712L, UCB1400BE,151 delivers strict AC '97 Rev. 2.1 compliance with minimal external components, making it optimal for cost-sensitive, space-constrained legacy handheld platforms where firmware reuse and hardware compatibility are critical.

Availability

UCB1400BE,151 is available at Aetrix Electronics and suitable for smart mobile phones, handheld PCs, and PDAs requiring stable component supply across long-lifecycle embedded programs.

Supply support for UCB1400BE,151 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 (originally Philips Semiconductors) is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and personal applications.

The UCB1400BE,151 belongs to NXP's legacy portable multimedia interface product line, designed specifically to consolidate audio, touch, and power monitoring functions into one chip for early-2000s handheld computing platforms.

FAQ

What is the primary interface protocol supported by the UCB1400BE,151?

The UCB1400BE,151 implements a full AC '97 Revision 2.1 interface as a primary codec only. It communicates with host controllers like Intel XScale™ via SDATA_OUT, SDATA_IN, BIT_CLK, SYNC, and RESET signals. It does not support secondary codec mode or non-AC '97 protocols such as I²S or SPI for audio data transfer. The UCB1400BE,151 relies exclusively on AC '97 for both control register access and PCM audio streaming.

Does the UCB1400BE,151 support direct headphone driving without external components?

Yes, the UCB1400BE,151 integrates stereo headphone drivers with short-circuit protection and virtual ground circuitry, enabling DC-coupled output to 16 Ω or 32 Ω headphones without external coupling capacitors. Its LINE_OUT_L and LINE_OUT_R pins deliver line-level signals and can directly drive headphones at up to 30 mW per channel. This capability is confirmed in the functional description and block diagram of the UCB1400BE,151 datasheet.

What touch screen technology is compatible with the UCB1400BE,151?

The UCB1400BE,151 supports only 4-wire resistive touch screens. Its TSPX, TSMX, TSPY, and TSMY pins provide dedicated analog connections for X-plate excitation and Y-plate sensing, enabling position, pressure, and plate resistance measurements. It does not support capacitive, 5-wire resistive, or surface acoustic wave (SAW) touch technologies. Compatibility is limited to standard 4-wire overlays with typical 200–500 Ω plate resistance.

Can the UCB1400BE,151 monitor voltages above 3.3 V?

Yes, the UCB1400BE,151 includes a 10-bit SAR ADC with an analog multiplexer that accepts up to four external analog inputs rated for 7.5 V maximum. These AD[3:0] inputs are intended for monitoring high-voltage sources such as battery packs, power supply rails, or thermal sensors - without external level-shifting circuitry. This feature is explicitly documented in the "Features" and "ADC and touch screen interface" sections of the UCB1400BE,151 datasheet.

What is the required clock source for the UCB1400BE,151?

The UCB1400BE,151 requires a 24.576 MHz clock source applied either as a crystal across XTL_IN and XTL_OUT pins or as a CMOS-level clock signal driven into XTL_IN. This clock feeds an internal PLL that generates the 12.288 MHz BIT_CLK used for AC '97 communication and all audio timing. No other clock frequency or interface (e.g., 12 MHz, 48 MHz, or external BIT_CLK injection) is supported - as confirmed in Section 8.1 "Clocking" of the UCB1400BE,151 product data.