The SN54LVC574A and SN74LVC574A are 8-bit edge-triggered D-type flip-flops, operating in the 2.7V to 3.6V VCC voltage and 3.3V VCC voltage respectively. Their inputs can accept voltages up to 5.5V, operating temperature range is -40°C to 85°C, -40°C to 125°C and -55°C to 125°C, maximum tpd is 7ns, typical VOLP (output ground bounce) is less than 0.8V, typical VOHV (output VOH undershoot) is greater than 2V. They support mixed-mode signal operation on all ports (5V input/output voltage with 3.3V VCC), Ioff supports partial power-down mode operation, latch-up performance exceeds 250 mA, ESD protection exceeds JEDEC 22 (2000V Human-Body Model (A114-A), 200V Machine Model (A115-A), 1000V Charged-Device Model (C101)).
The SN54LVC574A and SN74LVC574A are octal edge‑triggered D‑type flip‑flops featuring 3‑state outputs, suitable for buffer registers, I/O ports, bus drivers and working registers. They operate from low‑voltage supplies and support mixed‑mode 3.3‑V/5‑V systems.
The document provides recommended operating conditions, absolute‑maximum ratings, electrical and switching characteristics, package options, mechanical drawings, and ordering information. It also includes ESD protection specifications and a legal notice from Texas Instruments.
| Supply voltage range (SN54LVC574A) | 2 V to 3.6 V |
|---|---|
| Supply voltage range (SN74LVC574A) | 1.65 V to 3.6 V |
| Input voltage range (all packages) | 5.5 V |
| High‑level input voltage (VIH) | 2.7 V to 3.6 V |
| Low‑level input voltage (VIL) | 0.8 V to 2.7 V |
| ESD protection rating | 2000 V HBM, 200 V MM, 1000 V CDM |
| Package options | QFN, VFBGA, PDIP, SOIC, SOP, SSOP, TSSOP, TVSOP, CDIP, CFP, LOCC |
The SN54LVC574A operates from 2 V to 3.6 V.
OE should be tied to VCC through a pull‑up resistor so that the outputs remain in the high‑impedance state during power‑up or power‑down.
They meet 2000‑V Human‑Body Model, 200‑V Machine Model, and 1000‑V Charged‑Device Model specifications.
Available packages include QFN, VFBGA, PDIP, SOIC, SOP, SSOP, TSSOP, TVSOP, CDIP, CFP, and LOCC.