A die for a printhead is described herein. The die includes a number of fluid feed holes disposed in a line parallel to a longitudinal axis of the die, wherein the fluid feed holes are formed through a substrate of the die. A number of fluidic actuators are proximate to the fluid feed holes to eject fluid received from the plurality of fluid feed holes. The die includes logic circuitry to operate the fluidic actuators, wherein the logic circuitry is disposed on a first side of the plurality of fluid feed holes. Power circuitry to power the plurality of fluidic actuators is disposed on an opposite side of the fluid feed holes from the logic circuitry. Activation traces are disposed between each of the fluid feed holes to couple the logic circuitry to the power circuitry.

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 some examples, a controller includes an interface to receive an indication based on an electrical current through a device, and a processor to send control data to the device to operate the device, detect a measurement based on the indication that is responsive to an operation of the device according to the control data, and determine whether an issue exists in the device responsive to determining whether the measurement satisfies an expected property based on the control data.

A fluidic die includes a plurality of fluid chambers, each fluid chamber including an electrode exposed to an interior of the fluid chamber and having a corresponding fluid actuator operating a high voltage separated from the fluid chamber and electrode by an insulating material, and monitoring circuitry, operating at a low voltage, to monitor a condition of each fluid chamber. For each fluid chamber the monitoring circuitry includes a sense node and a conductor connecting the electrode to the sense node, the conductor having a geometry to form at least one region of higher current density relative to remaining portions of the conductor, the at least one region of higher current density to fail and create an open to protect the low-voltage monitoring circuitry in response to a fault current caused by a short circuit of the high voltage fluid actuator to the electrode.

A logic circuitry package for a replaceable print apparatus component includes an analog sensor cell block with a plurality of sensor cells, analog control circuitry to bias and control the analog sensor cell block, an interface to communicate with a print apparatus logic circuit, a dedicated bit field that indicates whether the logic circuitry package is in a power saving mode, and at least one logic circuit. The at least one logic circuit may be configured to receive, via the interface, a request to cause the analog sensor cell block to provide sensor information for at least one sensor measurement; and selectively enable and disable power to the analog control circuitry based on the request and a value of the dedicated bit field.

In some examples, a fluidic die includes a plurality of fluid actuators, an actuation data register to store actuation data that indicates each fluid actuator of the plurality of fluid actuators to actuate, and a plurality of mask registers to store respective different mask data patterns, each mask data pattern of the different mask data patterns indicating a respective set of fluid actuators of the plurality of fluid actuators enabled for actuation for a respective actuation event.

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 fluidic die may include a substrate supporting a fluid actuator address line and first and second groups of fluid actuators connected to the fluid actuator address line. The first group of fluid actuators may include first and second types of fluid actuators having different operating characteristics. The second group of fluid actuators may include the first and the second types of fluid actuators. The fluid actuators of the first and second groups have addresses such that a fluid actuator of the first type in the first group and a fluid actuator of the second type in the second group are both enabled in response to a single enabling event on the fluid actuator address line.

A memory circuit for a print component including plurality of I/O pads, including a first analog pad and a second analog pad, to connect to a plurality of signal paths which communicate operating signals to the print component, including an analog signal path connected to the first analog pad and the second analog pad, the first analog pad electrically isolated from the second analog pad to interrupt the analog signal path to the print component. The memory circuit further includes a memory component to store memory values associated with the print component, and a control circuit to, in response to a sequence of operating signals received by the I/O pads representing a memory read, 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.

One example of a fluidic die includes a power supply node, a plurality of fluidic actuators, a plurality of discharge circuits, and a single discharge enable signal path. The plurality of fluidic actuators are electrically coupled to the power supply node. The plurality of discharge circuits are electrically coupled to the power supply node. The single discharge enable signal path is electrically coupled to each discharge circuit of the plurality of discharge circuits to enable each discharge circuit of the plurality of discharge circuits in parallel.