74HC4538D

The 74HC4538D by NXP Semiconductors is a dual positive edge-triggered D-type flip-flop. It features individual data (nD), clock (nCP), set (nSD), and reset (nRD) inputs, along with complementary nQ and nQ outputs. Data meeting setup and hold time requirements on the low-to-high clock transition is stored and appears at the nQ output. The device includes Schmitt-trigger action on the clock input, providing tolerance to slower clock rise and fall times. Input clamp diodes allow the use of current-limiting resistors for interfacing with voltages exceeding VCC.

This flip-flop is available with either CMOS or TTL input levels. It boasts symmetrical output impedance, low power dissipation, high noise immunity, and balanced propagation delays. ESD protection is robust, exceeding 2000V for HBM (JESD22-A114F) and 200V for MM (JESD22-A115-A). The operating temperature range is specified from -40°C to +125°C.

The 74HC4538D is offered in multiple package options including DIP14, SO14, SSOP14, TSSOP14, and DHVQFN14. These packages support both through-hole and surface-mount assembly types, catering to various PCB design requirements.