UT54BS32245 Datasheet, PDF (1/14 Pages) Aeroflex Circuit Technology – UT54BS32245 32bit Bus Switch

Standard Products
UT54BS32245 32bit Bus Switch
Preliminary Datasheet
May 2015
www.aeroflex.com/busswitch
FEATURES
□ Provides cold-sparing capability without the need for actual
cold-sparing multiplexer inputs
□ Bidirectional Operation
□ 3.3 V operating power supply with typical 11Ω switch
connection between ports
□ 5.0V operating power supply typical 5Ω 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: up to 300 krad(Si)
- Latchup immune (LET <= 100 MeV-cm²/mg)
□ Packaging options:
- 99-lead CCGA, CLGA, CBGA
□ Standard Microcircuit Drawing (SMD)
- QML Q and V pending
INTRODUCTION
The UT54BS32245 provides 32 bits of high-speed CMOS-
compatible bus switching. The low on-state resistance of the
switch allows connections to be made with minimal
propagation delay. The device is organized as four 8-bit bus
switches, two 16-bit bus switches, or one 32-bit bus switch.
When output enable (/EN) 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
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
2A1
2B1
3A1
3B1
4A1
4B1
1A8
/EN1
1B8
2A8
/EN2
2B8
3A8
3B8
4A8
4B8
/EN3
/EN4
Figure 1. UT54BS32245 Block Diagram
36-00-03-000
Ver. 1.0.0
1
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