A memory circuit for a print component including a plurality of I/O pads, including an analog pad, to connect to a plurality of signal paths which communicate operating signals to the print component. The memory circuit includes a controllable selector connected in line with one of the signal paths via the I/O pads, the selector controllable to disconnect the corresponding signal path to the print component, and a memory component to store memory values associated with the print component. A control circuit, in response to a sequence of operating signals received by the I/O pads representing a memory read, to operate the controllable selector to disconnect the signal path to the print component to block the memory read of the print component, and provide an analog signal to the analog pad to provide an analog electrical value at the analog pad representing stored memory values selected by the memory read.

A fluid ejection controller interface includes input logic to receive control data packets and a first clock signal, each control data packet including a set of primitive data bits and a set of random bits, wherein the input logic identifies the random bits in the received control data packets to facilitate the creation of modified control data packets. The fluid ejection controller interface includes a clock signal generator to generate a second clock signal that is different than the first clock signal, and output logic to receive the modified control data packets, and output the modified control data packets to a fluid ejection controller of a fluid ejection device based on the second clock signal.

A die for a printhead is provided in examples. The die includes a number of fluidic actuator arrays, proximate to a number of fluid feed holes. A number of address lines are disposed proximate to a number of logic circuits on a low-voltage side of the fluid feed holes. An address decoder circuit is coupled to at least a portion of the address lines to select a fluidic actuator in a fluidic actuator array for firing. The address decoder circuit is customized to select a different address for each fluidic actuator in the fluidic actuator array. A logic circuit triggers a driver circuit located in a high-voltage side of the plurality of fluid feed holes opposite the low-voltage side, based, at least in part, on a bit value for the fluidic actuator array, the fluidic actuator selected by the address decoder circuit, and a firing signal.

In some examples, a fluid dispensing device includes a reservoir containing a fluid, fluidic actuators, and an interface to receive a data packet comprising information to control activation of the fluidic actuators, the data packet comprising a random number generated by a random number generator.

In one example, a warming system for a region of multiple ejector elements on an inkjet printhead includes a warming circuit having a heating element distinct from any of the ejector elements and a controller programmed to selectively energize the heating element only upon determining none of the ejector elements in the region is active.

A print element substrate, comprising a plurality of heating elements, a plurality of detection elements, each configured to detect a temperature of a corresponding heating element, a first current generation unit, a second current generation unit, and a signal output unit, wherein one of the first and second current generation units supplies a current to a first detection element, the other supplies a current to a second detection element, and the signal output unit outputs a signal according to a potential difference between one terminal of the first detection element on a side where a potential variation occurs upon supply of the current and one terminal of the second detection element on a side where a potential variation occurs upon supply of the current.

In a head substrate according to an embodiment of the present invention comprises a plurality of nozzles for discharging liquid; a plurality of electrothermal transducers corresponding to the plurality of nozzles; and a plurality of drivers corresponding to the plurality of electrothermal transducers, the substrate has the following configuration. Specifically, it comprises a detection circuit that detects, in a case where one of the plurality of electrothermal transducers is selected, a temperature of the selected transducer to which a first signal is applied to in order to discharge a liquid from a nozzle corresponding to the selected electrothermal transducer, and then a second signal is applied to heat the selected electrothermal transducer.

A fluidic die including an array of fluid actuating devices addressable by a set of addresses, and an array of memory elements including a first portion to receive a first set of address bits representative of a first portion of an address of the set of addresses, and a second portion to receive a second set of address bits representative of a second portion of the address of the set of addresses. A first address driver is to provide a first portion of the address of the set of addresses based on the first set of address bits received by the first portion of memory elements, and a second address driver is to provide a remaining portion of the address of the set of addresses based on a second set of address bits received by the second portion of memory elements.

An integrated circuit for a print component including a number of memory bits. The integrated circuit may include a selection circuit to select at least one memory bit of the number of memory bits and fire actuators of a fire pulse group. The integrated circuit may include a memory voltage regulator to provide a write voltage to the at least one memory bit of the number of memory bits.

According to examples, an apparatus may include fluid chambers that each includes a fluid actuator and an electrode. The fluid actuators may operate at a first voltage level and a monitoring circuitry may operate at a second voltage level that is lower than the first voltage level. The monitoring circuitry may monitor a condition of each fluid chamber based on a selection signal for selecting an electrode associated with a fluid chamber. The monitoring circuitry including an analog multiplexer that includes, for each of the electrodes for the plurality of fluid chambers, a level shifter to receive the selection signal at the second voltage level and to shift a level of the selection signal. The analog multiplexer may also include an analog pass gate to selectively couple the electrode of a respective fluid chamber to the monitoring circuitry based on the level shifted selection signal.