NXP Semiconductors HEF4511BT,653

Overview

HEF4511BT,653 from NXP Semiconductors is a BCD-to-7-segment latch/decoder/driver IC with active-HIGH NPN transistor outputs (Qa–Qg), active-HIGH latch enable (LE), active-LOW lamp test (LT), and active-LOW ripple blanking (BL). It operates from 3 V to 15 V over −40 °C to +125 °C and drives common-cathode LED, incandescent, fluorescent, gas discharge, and LCD displays in industrial panel meters and digital readouts.

For engineers reviewing the HEF4511BT,653 datasheet, HEF4511BT,653 pinout, HEF4511BT,653 application, or HEF4511BT,653 equivalent, this page delivers verified functional behavior, SO16 package details, latch timing constraints, segment output drive capability, and direct display interface guidance - all confirmed against NXP's Rev. 7 product data sheet (2011).

Technical Context

The HEF4511BT,653 integrates four D-type latches, a BCD-to-7-segment decoder, and seven NPN bipolar output drivers in a single monolithic CMOS structure. Its latch function captures D0–D3 inputs on LE HIGH transition, holding segment states independent of subsequent input changes.

LT forces all outputs HIGH for full-segment lamp testing; BL forces all outputs LOW for blanking. Both LT and BL bypass the latch and act directly on driver stages. Input thresholds are VIL ≤ 1.5 V (at VDD = 5 V) and VIH ≥ 3.5 V (at VDD = 5 V), supporting TTL- and CMOS-level compatibility across 5 V, 10 V, and 15 V supply rails.

Key Specifications

Pinout & Package

HEF4511BT,653 uses the SO16 plastic small outline package (SOT109-1), 16-pin, 3.9 mm body width, surface-mount compatible with JEDEC MS-012 footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar BCD-to-7-segment latch/decoder/driver applications.

Compared with CD4511BE and 74HC4511, the HEF4511BT,653 uniquely combines extended temperature operation (+125 °C), JEDEC compliance, and integrated NPN output drivers - enabling direct LED interfacing without external components in harsh-environment applications.

Availability

HEF4511BT,653 is available at Aetrix Electronics and suitable for industrial panel meters, digital readout systems, test equipment displays, and legacy industrial controller retrofits requiring stable component supply and long-term obsolescence management.

Supply support for HEF4511BT,653 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 leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in mixed-signal and logic IC design.

The HEF4511BT,653 belongs to NXP's HEF4000B logic family - engineered for high-noise-immunity, wide-voltage industrial control interfaces where reliability across extreme temperatures and supply variations is critical.

FAQ

What is the maximum supply voltage rating for the HEF4511BT,653?

The absolute maximum supply voltage (VDD) for the HEF4511BT,653 is +18 V, but the recommended operating range is 3 V to 15 V. Operation above 15 V risks exceeding safe power dissipation limits and may degrade long-term reliability. The HEF4511BT,653 is fully characterized and guaranteed across its 3 V–15 V range, including propagation delay, output drive, and latch functionality.

Can the HEF4511BT,653 drive common-anode LED displays directly?

No, the HEF4511BT,653 cannot drive common-anode LED displays directly because its Qa–Qg outputs are active-HIGH NPN transistors designed to sink current into common-cathode configurations. To use it with common-anode displays, external PNP transistors or level-shifting circuitry are required. The HEF4511BT,653 datasheet explicitly shows connection diagrams only for common-cathode LED, incandescent, and gas discharge displays.

How does the lamp test (LT) input behave when asserted on the HEF4511BT,653?

When LT is pulled LOW, the HEF4511BT,653 forces all seven segment outputs (Qa–Qg) HIGH regardless of LE, BL, or D0–D3 states - illuminating all segments simultaneously for visual verification. This action bypasses the latch and decoder logic entirely. LT has no effect on internal latched data; the last stored BCD value remains intact and resumes driving segments once LT returns HIGH.

What is the minimum pulse width required on the LE input of the HEF4511BT,653 at 15 V supply?

At VDD = 15 V, the minimum LE pulse width (tW) for reliable latching in the HEF4511BT,653 is 17 ns (typical) with a maximum of 35 ns across temperature. This specification ensures the internal D-type latches capture D0–D3 data before the LE signal falls. Shorter pulses risk metastability or incomplete data capture, especially under worst-case process/voltage/temperature conditions.

Does the HEF4511BT,653 support LCD display driving, and if so, how?

The HEF4511BT,653 can interface with LCD displays only via AC excitation - it does not support direct DC drive due to LCD degradation risks. As specified in the NXP datasheet, LCD connection requires an external square-wave generator (e.g., 1/4 HEF4070B XOR gate) to produce VSS-to-VDD AC signals applied to the LCD backplane and segments. The HEF4511BT,653 drives the segment electrodes, while the AC source handles bias inversion to prevent electrolytic damage.