Texas Instruments MM5453V

Overview

MM5453V from Texas Instruments is a monolithic CMOS LCD display driver IC designed for direct segment drive of 4½-digit 7-segment or alphanumeric LCDs. It provides 33 outputs (32 segment + 1 backplane), operates from 3V to 10V, supports serial data input without load signal, and delivers ±500 µA backplane sink/source current at 3V. It is used in digital voltmeters, thermometers, and industrial control indicators.

For engineers reviewing the MM5453V datasheet, MM5453V pinout, MM5453V application, or MM5453V equivalent, this page delivers verified technical context, package mapping to PLCC-44, confirmed 33-output capability with DATA ENABLE omission, and real-world timing and drive specifications aligned to TI SNLS367C.

Technical Context

The MM5453V implements a static master-slave shift register architecture accepting serial data with a leading "1" start bit followed by 32 segment bits, latching all 32 bits on the 36th clock edge. It omits the DATA ENABLE function present on MM5452V, instead exposing the 33rd output - confirming its identity as the 33-output variant.

It supports both internal RC oscillator (75 Hz backplane frequency with 50 kΩ/0.01 µF) and external clock inputs up to 1 MHz (duty cycle 40–60%), enabling synchronization with AC line or DVM integration time. Backplane outputs are paralleled for higher current drive, and segment outputs provide ±40 µA sink/source at 3V with ±50 mV offset voltage.

Key Specifications

Pinout & Package

MM5453V is housed in a 44-pin PLCC (Plastic Leaded Chip Carrier) package per TI package drawing FN0044A, with 4.57 mm maximum height and JEDEC MS-018 compliance. Pin 1 is marked by an optional corner notch or dot.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LCD driver applications.

Compared with MM5452V, MM5453V trades DATA ENABLE functionality for an additional segment output - simplifying designs needing full 33-line drive. Against ICM7211AMI, MM5453V offers programmable segment mapping and bar-graph capability at the cost of requiring serial data formatting.

Availability

MM5453V is available at Aetrix Electronics and suitable for digital instrumentation, industrial control panels, and portable test equipment requiring stable component supply and long-term lifecycle support.

Supply support for MM5453V 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 company founded in 1930, specializing in analog, embedded processing, and logic ICs with broad industrial and instrumentation heritage.

The MM545x family was developed specifically for low-power, high-reliability LCD segment driving in battery-operated and industrial-grade meters and indicators - emphasizing serial simplicity, wide voltage tolerance, and ESD-hardened CMOS design.

FAQ

What is the key functional difference between MM5453V and MM5452V?

The MM5453V provides 33 outputs: 32 segment drivers plus one dedicated backplane output (pin 40), omitting the DATA ENABLE function found on MM5452V. This allows direct use of all 33 pins for display drive without external gating. The MM5453V pinout matches MM5452V except for pin 40's role, and both share identical PLCC-44 packaging and electrical specs. MM5453V is the preferred choice when full 33-line segment/backplane drive is needed.

Does MM5453V require an external load signal to update the display?

No, MM5453V does not require an external load signal. It uses internal logic to generate a synchronous LOAD pulse on the 36th clock edge after receiving the start bit and 32 data bits. This eliminates the need for additional control lines and simplifies interface design - a core feature confirmed in the SNLS367C functional description and timing diagram for MM5453V.

What package type and pin count does MM5453V use?

MM5453V uses a 44-pin PLCC (Plastic Leaded Chip Carrier) package per TI drawing FN0044A. It is not offered in PDIP. The package has a maximum height of 4.57 mm, complies with JEDEC MS-018, and features a corner notch or dot for pin 1 identification. This differs from the 40-pin PDIP variants (e.g., MM5453N) and confirms MM5453V's surface-mount suitability for compact instrumentation layouts.

Can MM5453V drive bar-graph LCDs, and what is required?

Yes, MM5453V supports alphanumeric and bar-graph LCDs as explicitly stated in its TI datasheet features. Since it provides 32 individually controllable segment outputs plus one backplane, any segment-to-bar mapping is achievable via software-defined serial data formatting. No hardware modification is needed - the device treats all outputs as independent, allowing full customization of bar activation patterns through the 32-bit input stream.

What is the maximum clock frequency supported by MM5453V at 5V supply?

At VDD = 5V, MM5453V supports a maximum clock frequency of 750 kHz, as specified in the Electrical Characteristics table of SNLS367C. Clock rise/fall times must not exceed 300 ns, and duty cycle must remain between 40% and 60% to avoid LCD voltage offset. This timing allows reliable 32-bit serial loading in under 43 µs, enabling rapid display updates in responsive instrumentation.