Texas Instruments CD4048BPWR

Overview

CD4048BPWR from Texas Instruments is a CMOS multifunction expandable logic gate IC with eight primary inputs plus one EXPAND input, enabling cascaded 16-input configurations. It operates over 3–18 V supply range, supports dual-mode logic (OR/NOR and AND/NAND selectable via mode control), and features buffered outputs with ±4.2 mA drive capability at 5 V.

For engineers reviewing the CD4048BPWR datasheet, CD4048BPWR pinout, CD4048BPWR application, or CD4048BPWR equivalent, this device serves as a configurable combinational logic building block in low-power digital systems where input expansion, voltage flexibility, and logic-mode selection are required.

Technical Context

The CD4048BPWR implements a programmable 8-input (plus EXPAND) gate with mode-selectable OR/NOR or AND/NAND logic function via the MODE pin. Its internal architecture includes input buffers, a mode-controlled logic matrix, and a totem-pole output stage with rail-to-rail swing.

It supports true and complemented input logic levels, allows wired-OR expansion across multiple units using the EXPAND terminal, and maintains static operation with no minimum clock or timing constraints-functioning as pure combinational logic without internal latching or state elements.

Key Specifications

Pinout & Package

CD4048BPWR is housed in a 16-lead thin shrink small-outline package (TSSOP), JEDEC MO-153 compliant, with 0.65 mm lead pitch, body dimensions 5.1 mm × 4.5 mm × 1.2 mm max, and gull-wing leads for surface-mount assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multifunction expandable logic gate applications.

Compared with CD4048BPWR, CD4085BE offers simpler fixed logic but no configurability or expansion, while 74AC11000 delivers faster speed at lower voltage but sacrifices supply range, mode selection, and scalable input count-making CD4048BPWR uniquely suited for adaptable, wide-voltage, medium-speed logic consolidation.

Availability

CD4048BPWR is available at Aetrix Electronics and suitable for industrial control panels, low-power sensor interfaces, programmable logic modules, and legacy system upgrades requiring stable component supply and long-term obsolescence mitigation.

Supply support for CD4048BPWR 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic technologies, with over 90 years of innovation in industrial, automotive, and communications markets.

The CD4048B series belongs to TI's legacy CMOS logic product line, designed specifically for voltage-flexible, low-power, and field-reconfigurable digital control applications where programmable combinational logic reduces gate count and improves system adaptability.

FAQ

What logic functions does the CD4048BPWR support, and how is the mode selected?

The CD4048BPWR supports OR/NOR when the MODE pin is low, and AND/NAND when MODE is high. This selection is implemented via an internal logic matrix controlled solely by the MODE pin voltage level-no external components or timing sequences are required. The CD4048BPWR datasheet confirms this behavior across the full 3–18 V supply range, and the mode remains stable during static operation.

Can the CD4048BPWR be used to build a 16-input logic gate, and what is required?

Yes, two CD4048BPWR units can be cascaded to form a 16-input gate using the EXPAND input. The first unit's output drives the second unit's EXPAND pin (active-low), while both share the same MODE setting. The CD4048BPWR datasheet Figure 2 explicitly illustrates this configuration, and no additional logic or pull-up resistors are needed beyond connecting EXPAND to VSS when unused.

What is the maximum supply voltage rating for the CD4048BPWR, and does it affect timing performance?

The CD4048BPWR is rated for operation up to 18 V DC, with guaranteed performance across the full 3–18 V range. Propagation delay increases with decreasing supply voltage (e.g., 120 ns max at 5 V, 220 ns at 3 V), but functionality remains intact. The CD4048BPWR datasheet specifies absolute maximum ratings and AC characteristics separately for each voltage grade, confirming safe 18 V operation without derating.

Are pins 13–15 on the CD4048BPWR functional, and how should they be handled?

Pins 13, 14, and 15 on the CD4048BPWR are internally unconnected (NC) and must not be tied to any signal or supply. The CD4048BPWR datasheet states these pins have no internal bond wires and recommends leaving them floating or optionally connecting to VSS for mechanical stability-never to VDD or signal lines, as that may cause leakage or ESD susceptibility.

Does the CD4048BPWR require external pull-up or pull-down resistors on its inputs or EXPAND pin?

No, the CD4048BPWR has CMOS input structure with high-impedance, rail-referenced thresholds; all inputs-including EXPAND-are fully specified for direct connection to logic-high or logic-low sources. When unused, EXPAND must be tied to VSS (not left floating) per Section 7.2 of the CD4048BPWR datasheet to prevent undefined output states and ensure predictable cascading behavior.