UT54BS3245 Datasheet, PDF (1/11 Pages) Aeroflex Circuit Technology – Provides cold-sparing capability without the need for actual cold-sparing multiplexer inputs

Standard Products
UT54BS3245 8x1 Bus Switch
Preliminary Datasheet
February 2015
www.aeroflex.com/busswitch
FEATURES
□ Provides cold-sparing capability without the need for actual
cold-sparing multiplexer inputs
□ Bidirectional operation
□ 3.3V operating lower supply with typical 11Ω switch
connection between ports
□ 5V operating lower supply with typical 5 Ω switch
connection between ports
□ Isolates non cold-spared devices from an active bus
□ Ultra low power CMOS technology
□ ESD rating HBM: 2000V, Class 2
□ Operational environment:
- Total dose: 300 krad(Si)
- Latchup immune (LET <= 100 MeV-cm2/mg)
□ Packaging:
- 20-lead flatpack
□ Standard Microelectronics Drawing (SMD)
- QML Q and V pending
INTRODUCTION
The UT54BS3245 provides eight channels of high-speed
CMOS compatible bus switching. The package is to provide a
standard ’245 device pin out. The low on-state resistance of
the switch allows connections to be made with minimal
propagation delay. The device is organized as one 8-channel
switch. When the output-enable (/EN) input is low, the switch
is on, and port A is connected to port B. When /EN is high, the
switch is open, and the high-impedance state exists between
the two ports.
APPLICATIONS INFORMATION
Memory Interface
- Solution for multiple memory devices on a bus –
isolates heavy loading
Bus Isolation
- Ability to electrically isolate a device, or banks of
devices, from memory bus or ADC output when not
needed
- Enables bank switching for redundancy or device
failure
- Provides cold-sparing capability without the need for
actual cold-sparing buffers
Redundancy
- Allows multiple non cold-spare devices to be present
on a bus
Supports Analog Applications
- In voltage range: 3.0 to 3.6V or 4.5 to 5.5V
- Signal isolation: -60dB
- Bandwidth (3dB): 500 MHz
1A1
1B1
36-00-03-004
Ver. 1.0.0
1A8
1B8
/EN
Figure 1. UT54BS3245 Block Diagram
1
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