CY74FCT257T

Pinout




Specifications

Supply voltage range to ground potential  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 0.5 V to 7 V
DC input voltage range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  .0.5 V to 7 V
DC output voltage range   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 7 V
DC output current (maximum sink current/pin)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 mA
Package thermal impedance, JA (see Note 1): Q package   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 90°C/W
                                                                          SO package   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57°C/W
Ambient temperature range with power applied, T_A  . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . 65°C to 135°C
Storage temperature range, T_stg   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . 65°C to 150°C


Description

The CY74FCT257T has four identical two-input multiplexers that select four bits of data from two sources under the control of a common data-select (S) input. The I0 inputs are selected when S is low, and the I1 inputs are selected when S is high. Data at the output is noninverted. The CY74FCT257T is a logic implementation of a four-pole, two-position switch, where the position of the switch is determined by the logic levels at S. Outputs are in the high-impedance state when the output-enable (OE) input is high.All but one device must be in the high-impedance state to avoid currents exceeding the maximum ratings if outputs are tied together. OE inputs must ensure that there is no overlap when outputs of 3-state devices are tied together.This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs,preventing damaging current backflow through the CY74FCT257T when it is powered down.