This is information on a product in full production.
April 2012 Doc ID 18093 Rev 2 1/22
22
54AC164245
Rad-hard 16-bit transceiver, 3.3 V to 5 V bidirectional level shifter
Datasheet − production data
Features
■ Fully compatible with 54ACS164245
■ Dual supply bidirectional level shifter
■ Extended voltage range from 2.3 V to 5.5 V
■ Separated enable pin for 3-state output
■ Schmidt-triggered I/Os: 100 mV hysteresis
■ Internal 26 Ω limiting resistor on each I/O
■ High speed: Tpd = 8 ns maximum
■ Bus hold
■ Fail safe
■ Cold spare
■ Hermetic package
■ 100 krad (Si) at any Mil1019 dose rate
■ SEL immune to 110MeV.cm
2
/mg LET ions
■ RHA QML-V qualified
Description
The 54AC164245 is a rad-hard advanced high-
speed CMOS, Schmitt trigger 16-bit bidirectional
multi-purpose transceiver with 3-state outputs and
cold sparing.
Designed for use as an interface between a 5 V
bus and a 3.3 V bus in mixed 5 V/3.3 V supply
systems, it achieves high-speed operation while
maintaining the CMOS low-power dissipation.
All pins have cold spare buffers to change them to
high impedance when V
DD
is tied to ground.
This IC is intended for two-way asynchronous
communication between the data buses and the
direction of the data transmission is determined
by the nDIR inputs.
The A port interfaces with the 3.3 V bus but can
also operate at 2.3 V. The B port operates with the
5 V bus.
Note: Contact your ST sales office for information on the specific conditions for products in die form.
Ceramic Flat-48
The upper metallic lid is not electrically connected to
any pins, nor to the IC die inside the package
Table 1. Device summary
Reference SMD pin
Quality
level
Package
Lead
finish
Mass EPPL Temp range
RHRAC164245K1 -
Engineering
model
Flat-48
Gold
1.50 g
-
-55 °C
to +125 °C
RHRAC164245K01V 5962R9858008VYC
QMLV-
Flight
Gold Target
www.st.com
