onsemi MM88C30N

Overview

MM88C30N from Fairchild Semiconductor is a dual differential line driver with integrated dual four-input NAND logic, operating from 3V to 15V supply, delivering ±80 mA typical output source/sink current at 25°C, featuring 20Ω typical output ON resistance and eliminating ground-loop errors via differential signaling - used in industrial digital data transmission over twisted-pair lines.

For engineers reviewing the MM88C30N datasheet, pinout, applications, or equivalent options, key selection considerations include its dual differential drive capability, absence of V_CC-clamp diodes enabling mixed-voltage CMOS interfacing, guaranteed propagation delay under 150 ns at 10V, and PDIP-14 package compatibility with legacy board layouts.

Technical Context

The MM88C30N integrates two independent differential line drivers, each with complementary outputs (Y and Y̅), and shares dual four-input NAND gates whose outputs feed the driver enable paths. Its input protection lacks a V_CC clamp, allowing VIN to exceed V_CC up to V_CC +16V - critical for level-shifting between disparate CMOS domains.

Differential propagation delay is specified at ≤400 ns (5V) and ≤150 ns (10V) into 100Ω/5000 pF loads, while output resistance exhibits temperature coefficients of 0.55%/°C (source) and 0.40%/°C (sink), ensuring predictable drive strength across −40°C to +85°C.

Key Specifications

Pinout & Package

MM88C30N is housed in a 14-lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" wide, with 0.100" lead pitch and through-hole mounting compatibility.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual differential line driver applications.

Compared with SN75ALS197N and MAX488CPA+, the MM88C30N uniquely combines differential drive, integrated NAND logic, and V_CC-clamp-free inputs - enabling compact, mixed-voltage, self-enabled line driver designs not achievable with either alternative alone.

Availability

MM88C30N is available at Aetrix Electronics and suitable for industrial data bus drivers, legacy system level-shifters, dual-channel sensor interfaces, and redundant control signal drivers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MM88C30N 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

Fairchild Semiconductor was a U.S.-based designer of high-performance analog and mixed-signal ICs, acquired by ON Semiconductor in 2016; known for robust industrial-grade logic and interface products.

The MM88C30N belongs to Fairchild's legacy line driver family engineered for noise-immune digital data transmission in harsh industrial environments - emphasizing ground-loop elimination, wide supply flexibility, and mixed-voltage interoperability.

FAQ

What is the maximum allowable input voltage relative to V_CC for MM88C30N?

The MM88C30N allows input voltages up to V_CC +16V due to the absence of a V_CC-clamp diode in its input protection structure. This specification is confirmed in the Absolute Maximum Ratings table and enables direct interfacing with higher-voltage CMOS sources without external level-shifting components. The MM88C30N thus supports mixed-supply system architectures where upstream logic operates at voltages exceeding the MM88C30N's own V_CC.

Does MM88C30N support true differential signaling with matched propagation delays?

Yes, the MM88C30N provides two fully independent differential output pairs (Pins 6/7 and 9/10), each with complementary Y/Y̅ outputs. Its differential propagation delay is explicitly characterized at ≤150 ns (10V) under 100Ω/5000 pF load conditions. Matched internal routing and identical output stage design ensure inter-pair skew remains below 5 ns, making MM88C30N suitable for synchronous dual-channel applications requiring tight timing alignment.

Can MM88C30N be used as a standalone line driver without utilizing its NAND logic gates?

Yes, the MM88C30N can operate as a pure dual differential line driver by tying the NAND outputs (Pins 5 and 11) to V_CC via pull-up resistors or hard-wiring them high. The NAND gates are logically independent of the driver stages, so disabling them does not affect output drive capability, R_ON, or timing. This configuration preserves all MM88C30N electrical specifications while using only its driver functionality.

What is the thermal derating behavior of MM88C30N in its PDIP package?

The MM88C30N in N14A PDIP package has a junction-to-ambient thermal resistance (θ_JA) of 150°C/W. At ambient temperatures above 25°C, its maximum allowable power dissipation must be linearly reduced: for example, at 70°C ambient, the safe continuous power drops to approximately 467 mW. This derating is necessary to maintain junction temperature ≤150°C, as specified in Absolute Maximum Ratings - a constraint directly applicable to sustained high-current operation of MM88C30N.

Is MM88C30N pin-compatible with MM88C29N?

No, MM88C30N and MM88C29N are not pin-compatible. While both use the same N14A PDIP package, their internal functions and pin assignments differ significantly: MM88C29N is a quad single-ended driver with different output configurations and logic structure, whereas MM88C30N implements dual differential drivers plus NAND logic with distinct pin mapping (e.g., Pins 1–4 are NAND inputs in MM88C30N but driver inputs in MM88C29N). Substitution requires PCB layout revision and logic redesign - MM88C30N is not a drop-in replacement for MM88C29N.