Renesas D15LD74AT#H0P

Overview

D15LD74AT#H0P from Renesas Electronics is an 8-bit D-type flip-flop driver with open-drain NMOS outputs, common clock and clear inputs, and 15 V drain-source voltage tolerance. It operates from 3.0–5.5 V supply, delivers up to 200 mA per output at ≤55% duty cycle in TSSOP-20 package, and targets high-voltage logic interface applications such as amusement equipment LED matrix drivers.

For engineers reviewing the D15LD74AT#H0P datasheet, D15LD74AT#H0P pinout, D15LD74AT#H0P application, or D15LD74AT#H0P equivalent, key selection criteria include verified 15 V open-drain output capability, simultaneous 8-bit latching with shared CLK/CLR, TSSOP-20 thermal derating (105 mA @ 100% duty), Schmitt-triggered inputs (V_H = 1.5 V typ), and guaranteed 20 MHz max clock frequency at 5.0 V.

Technical Context

This device implements eight independent D-type flip-flops feeding high-voltage NMOS open-drain drivers, each with identical timing behavior and shared asynchronous clear and synchronous clock inputs. All inputs feature Schmitt-trigger circuitry for noise immunity, and outputs are rated for 15 V V_DS with on-resistance of 2.5–3.8 Ω at 100 mA.

Operation requires strict adherence to recommended conditions: V_CC = 3.0–5.5 V, ambient temperature –20 to +85 °C, and output duty cycle limits tied to package type-TSSOP-20 supports 105 mA continuous per channel only at 100% duty, dropping to 200 mA at ≤25% duty. Unused inputs must be externally biased.

Key Specifications

Pinout & Package

TSSOP-20 package (JEITA code PTSP0020JB-A, Renesas code TTP-20DAV), 4.4 mm × 6.5 mm × 1.0 mm body, 0.65 mm pitch, Ni/Pd/Au plating, tape-and-reel packaging (2,000 pcs/reel).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit open-drain driver applications.

Compared with TB62706CFNG and ULN2803ADWR, D15LD74AT#H0P offers optimal balance of 3.3/5 V logic compatibility, 20 MHz clock support, and compact TSSOP-20 footprint for new designs targeting 12 V amusement and industrial interfaces - while avoiding Darlington saturation losses and oversized packages.

Availability

D15LD74AT#H0P is available at Aetrix Electronics and suitable for amusement equipment control, industrial I/O expansion, LED matrix driving, and test fixture load switching requiring stable component supply and long-term production continuity.

Supply support for D15LD74AT#H0P 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

Renesas Electronics Corporation is a global semiconductor manufacturer headquartered in Tokyo, Japan, specializing in microcontrollers, analog and power devices, and system-on-chip solutions for industrial, automotive, and consumer markets.

D15LD74AT#H0P belongs to Renesas' legacy logic driver family designed specifically for high-voltage, high-noise industrial and entertainment equipment interfaces - emphasizing robustness, wide supply range, and ease of MCU integration.

FAQ

What is the maximum continuous output current per channel for D15LD74AT#H0P in TSSOP-20 package?

The D15LD74AT#H0P supports 105 mA per output continuously at 100% duty cycle in TSSOP-20 package, as specified in Recommended Operating Conditions. At lower duty cycles (≤25%), it can deliver up to 200 mA per channel. This derating ensures junction temperature remains within safe limits under sustained load conditions.

Does D15LD74AT#H0P support 3.3 V microcontroller logic levels?

Yes, D15LD74AT#H0P supports 3.3 V logic: its V_CC range is 3.0–5.5 V, and input thresholds (V_IL ≤ 0.16×V_CC, V_IH ≥ 0.76×V_CC) ensure reliable recognition of 3.3 V signals. At V_CC = 3.3 V, VIH is ~2.5 V and VIL is ~0.5 V, providing adequate noise margin for standard CMOS outputs.

Can D15LD74AT#H0P drive 12 V LEDs directly without external components?

Yes, D15LD74AT#H0P can drive 12 V LEDs directly: its open-drain NMOS outputs tolerate up to 15 V V_DS, and each channel sinks up to 200 mA. An external current-limiting resistor must be placed between the LED anode and +12 V rail; the D15LD74AT#H0P sinks current through the cathode path.

What is the function of the CLR pin on D15LD74AT#H0P?

The CLR (Clear) pin on D15LD74AT#H0P is an asynchronous active-low input that forces all eight outputs (Y0–Y7) into high-impedance (off) state immediately, overriding the clock and data inputs. This provides hardware-level fail-safe shutdown for safety-critical or fault-recovery scenarios in amusement and industrial systems.

Is D15LD74AT#H0P pin-compatible with other variants in the RD15LD74x series?

Yes, D15LD74AT#H0P shares identical pinout and logic functionality with RD15LD74AP and RD15LD74ANP - all three are functionally equivalent 8-bit D-type flip-flop drivers in 20-pin packages (TSSOP, SDIP, DILP respectively). Only package dimensions, thermal characteristics, and packaging differ; PCB layout for TSSOP-20 is not interchangeable with SDIP or DILP footprints.