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Low rDS(on) . . . 5 W Typical

Avalanche Energy . . . 30 mJ

Eight Power DMOS-Transistor Outputs of

150-mA Continuous Current

500-mA Typical Current-Limiting Capability

Output Clamp Voltage . . . 50 V

Four Distinct Function Modes

Low Power Consumption

description

This power logic 8-bit addressable latch controls

open-drain DMOS-transistor outputs and is

designed for general-purpose storage

applications in digital systems. Specific uses

include working registers, serial-holding registers,

and decoders or demultiplexers. This is a multifunctional

device capable of storing single-line

data in eight addressable latches and 3-to-8

decoder or demultiplexer with active-low DMOS

outputs.

Four distinct modes of operation are selectable by

controlling the clear (CLR) and enable (G) inputs

as enumerated in the function table. In the

addressable-latch mode, data at the data-in (D)

terminal is written into the addressed latch. The

addressed DMOS-transistor output inverts the

data input with all unaddressed DMOS-transistor

outputs remaining in their previous states. In the

memory mode, all DMOS-transistor outputs

remain in their previous states and are unaffected

by the data or address inputs. To eliminate the

possibility of entering erroneous data in the latch,

enable G should be held high (inactive) while the

address lines are changing. In the 3-to-8 decoding

or demultiplexing mode, the addressed output is

inverted with respect to the D input and all other

outputs are off. In the clear mode, all outputs are off and unaffected by the address and data inputs. When data

is low for a given output, the DMOS-transistor output is off. When data is high, the DMOS-transistor output has

sink-current capability.

Outputs are low-side, open-drain DMOS transistors with output ratings of 50 V and 150-mA continuous

sink-current capability. Each output provides a 500-mA typical current limit at TC = 25°C. The current limit

decreases as the junction temperature increases for additional device protection.

The TPIC6B259 is characterized for operation over the operating case temperature range of –40°C to 125°C.