Single-gate logic ICs for automotive applications

November 04, 2020 //By Christoph Hammerschmidt
Single-gate logic devices for automotive applications
Single-gate logic is used extensively in automotive systems, wherever a signal needs to be gated, buffered or inverted. With two new products, the 74AHC1GxxQ and 74AHCT1GxxQ, Diodes Inc. is closing a gap in its portfolio of automotive-compliant logic devices. Both products are AEC-Q100 grade 1 qualified, manufactured in IATF 16949 certified facilities, and PPAP capable.

The new products offer 2-input single-gate solutions for AND, OR, XOR, NAND, and NOR gates as well as inverters and buffers. The inverters are available with and without Schmitt trigger inputs while the buffers have 3-state outputs with active-high or active-low output enable. The only difference between the two is that the  74AHC1GxxQ is implemented in standard CMOS technology while the 74AHCT1GxxQ is TTL compatible.

The CMOS compatible 74AHC1GxxQ devices operate from a supply voltage of between 2.0V and 5.5V, while the TTL compatible 7A4HCT1GxxQ devices operate from a supply voltage of between 4.5V and 5.5V. Propagation delays are typically between 4.5ns for the CMOS Inverter (74AHC1G04QSE-7) and 5.9ns for the TTL compatible Schmitt Trigger Inverter (74AHCT1G14QSE-7). 

The 74AHC1GxxQ and 74AHCT1GxxQ join Diodes’ portfolio of automotive “1G” logic devices, making logic products the largest category of AEC-Q100 qualified products available from that comany. Diodes, for highest reliability, has chosen to use die dedicated to automotive-compliant devices, removing circuitry under the bond pad and using gold bond wires.

The 74AHC1GxxQ, 74AHCT1GxxQ and 74LVC1GxxQ families are available now in both SOT25 and SOT353 packages, priced as $0.045 in 1000 piece quantities. 

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