1 Features

? VID V62/23631-01XE

? Radiation Tolerant

– Single Event Latch-Up (SEL) immune up to 43

MeV-cm2/mg at 125°C

– Total Ionizing Does (TID) Radiation Lot

Acceptance Testing (RLAT) for every wafer lot

up to 30 krad(Si)

– Single Event Transient (SET) characterized up

to LET = 43 MeV-cm2/mg

? Wide operating range of 1.2 V to 5.5 V

? Single-supply voltage translator:

– Up translation:

? 1.2 V to 1.8 V

? 1.5 V to 2.5 V

? 1.8 V to 3.3 V

? 3.3 V to 5.0 V

– Down translation:

? 5.0 V, 3.3 V, 2.5 V to 1.8 V

? 5.0 V, 3.3 V to 2.5 V

? 5.0 V to 3.3 V

? 5.5-V tolerant input pins

? Supports standard pinouts

? Up to 150 Mbps with 5-V or 3.3-V VCC

? Latch-up performance exceeds 250 mA per JESD

17

? Space Enhanced Plastic

– Controlled baseline

– Au bondwire and NiPdAu lead finish

– Meets NASA ASTM E595 outgassing

specification

– One fabrication, assembly, and test site

– Extended product life cycle

– Product traceability

2 Applications

? Enable or disable a digital signal

? Controlling an indicator LED

? Translation between communication modules and

system controllers

3 Description

The SN54SC4T125-SEP contains four independent

buffers with 3-state outputs and extended voltage

operation to allow for level translation. Each buffer

performs the Boolean function Y = A in positive logic.

The outputs can be put into a high impedance (Hi-Z)

state by applying a HIGH on the OE pin. The output

level is referenced to the supply voltage (VCC) and

supports 1.8-V, 2.5-V, 3.3-V, and 5-V CMOS levels.

The input is designed with a lower threshold circuit to

support up translation for lower voltage CMOS inputs

(for example, 1.2 V input to 1.8 V output or 1.8 V input

to 3.3 V output). In addition, the 5-V tolerant input pins

enable down translation (for example, 3.3 V to 2.5 V

output).