1. General description

The 74HC109-Q100; 74HCT109-Q100 is a dual positive edge triggered JK flip-flop featuring

individual nJ and nK inputs. It has clock (nCP) inputs, set (nSD) and reset (nRD) inputs and

complementary nQ and nQ outputs. The set and reset are asynchronous active LOW inputs and

operate independently of the clock input. The nJ and nK inputs control the state changes of the

flip-flops as described in the mode select function table. The nJ and nK inputs must be stable one

set-up time prior to the LOW-to-HIGH clock transition for predictable operation. The JK design

allows operation as a D-type flip-flop by connecting the nJ and nK inputs together. Inputs include

clamp diodes. It enables the use of current limiting resistors to interface inputs to voltages in

excess of VCC.

Schmitt-trigger action in the clock input makes the circuit highly tolerant to slower clock rise and fall

times.

This product has been qualified to the Automotive Electronics Council (AEC) standard Q100

(Grade 1) and is suitable for use in automotive applications.

2. Features and benefits

• Automotive product qualification in accordance with AEC-Q100 (Grade 1)

• Specified from -40 °C to +85 °C and from -40 °C to +125 °C

• Input levels:

• For 74HC109-Q100: CMOS level

• For 74HCT109-Q100: TTL level

• J and K inputs for easy D-type flip-flop

• Toggle flip-flop or do nothing mode

• Specified in compliance with JEDEC standard no. 7A

• ESD protection:

• MIL-STD-883, method 3015 exceeds 2000 V

• HBM JESD22-A114F exceeds 2000 V

• MM JESD22-A115-A exceeds 200 V (C = 200 pF, R = 0 Ω)