NXP Semiconductors MPXA4250A6T1

Overview

MPXA4250A6T1 from Freescale Semiconductor is a fully integrated, temperature-compensated and factory-calibrated manifold absolute pressure (MAP) sensor in a small-outline surface-mount package (Case 482-01), delivering 0.2–4.9 V ratiometric analog output over 20–250 kPa range, with ±1.5% full-scale accuracy from 0° to 85°C, designed for engine intake air mass calculation in automotive ECU systems.

For engineers reviewing the MPXA4250A6T1 datasheet, MPXA4250A6T1 pinout, MPXA4250A6T1 application, or MPXA4250A6T1 equivalent, this page provides verified package mapping, validated pin functions, confirmed operating characteristics, and real-world automotive and industrial use context - all derived from Freescale's Rev 6 technical data.

Technical Context

The MPXA4250A6T1 integrates a monolithic silicon piezoresistive sensing element with on-chip bipolar signal conditioning, including two-stage gain amplification and ground-reference shift circuitry. Its transfer function is VOUT = VS × (0.004 × P − 0.04), where VS is 5.1 V ± 0.25 V and P is absolute pressure in kPa.

It features thin-film metallization and micromachined diaphragm technology, with fluorosilicone gel protection for die and wire bonds. The device operates ratiometrically, requires external 1.0 µF/470 pF decoupling per Figure 3, and exhibits 1.0 ms response time and ±0.5% VFSS offset stability after 1000-hour pulsed pressure/temperature cycling.

Key Specifications

Pinout & Package

MPXA4250A6T1 uses the Small Outline Package (SOP), Case 482-01 - a surface-mount, thermoplastic housing measuring 10.79 × 10.79 × 5.84 mm (max), with 8 leads and notch-based Pin 1 identification. Pins 1, 5, 6, 7, and 8 are internal no-connects; only Pins 2 (VS), 3 (GND), and 4 (VOUT) are externally usable.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar absolute pressure sensing applications.

Compared with MPX4250A (through-hole unibody) and MPXV7025DP (low-range differential), MPXA4250A6T1 uniquely delivers factory-calibrated, ratiometric absolute pressure output in an SMT-optimized package - making it the only option among the three qualified for high-volume automotive MAP applications requiring 20–250 kPa range and ≤1.5% error.

Availability

MPXA4250A6T1 is available at Aetrix Electronics and suitable for automotive engine control units, turbocharger boost monitoring systems, and industrial vacuum regulation applications requiring stable component supply, long-lifecycle support, and AEC-Q200-aligned reliability.

Supply support for MPXA4250A6T1 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

Freescale Semiconductor (now part of NXP Semiconductors) is a global leader in automotive and industrial microcontrollers, sensors, and analog ICs, with deep expertise in embedded system-on-chip solutions.

The MPXA4250A6T1 belongs to Freescale's MPX-series integrated pressure sensor family, engineered specifically for cost-sensitive, high-reliability engine management systems requiring calibrated analog output without external signal conditioning.

FAQ

What is the operating pressure range of the MPXA4250A6T1?

The MPXA4250A6T1 operates over an absolute pressure range of 20 to 250 kPa (2.9 to 36.3 psi), covering full vacuum to moderate boost conditions typical in naturally aspirated and turbocharged gasoline engines. This range is factory-calibrated and specified in Freescale's Rev 6 datasheet, with output saturation outside these limits.

Does the MPXA4250A6T1 require external calibration?

No, the MPXA4250A6T1 is fully temperature-compensated and factory-calibrated. Its transfer function VOUT = VS × (0.004 × P − 0.04) is pre-programmed during manufacturing, eliminating the need for end-user calibration. Freescale specifies ±1.5% full-scale accuracy over 0° to 85°C without additional trimming - a key feature confirmed in Table 2 of the MPXA4250A6T1 datasheet.

What decoupling components are required for stable operation of the MPXA4250A6T1?

Freescale mandates a 1.0 µF tantalum (or ceramic) capacitor and a 470 pF ceramic capacitor between VS and GND, plus a 0.01 µF capacitor from VOUT to GND, as shown in Figure 3 of the MPXA4250A6T1 datasheet. Omitting these causes failure to meet specified accuracy, response time, and noise immunity - especially critical in noisy engine bay environments.

Can the MPXA4250A6T1 be used with a 3.3 V microcontroller supply?

No - the MPXA4250A6T1 requires VS = 4.85–5.35 VDC per Table 2. Its ratiometric output scales with VS, so using 3.3 V violates absolute maximum ratings and results in out-of-spec output voltage (0.2–4.9 V assumes 5.1 V). For 3.3 V systems, a level-shifting buffer or alternative sensor such as MPXV5004DP must be selected.

Is the MPXA4250A6T1 compatible with media other than dry air?

Freescale explicitly qualifies the MPXA4250A6T1 for dry air only. Exposure to oil mist, fuel vapor, moisture, or corrosive gases may degrade long-term stability and cause irreversible sensor drift. Application Note AN1646 and the datasheet caution against non-dry-air media; media compatibility testing must be performed separately if alternate media are required.