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UT54BS3245 Datasheet Preview

UT54BS3245 Datasheet

8x1 Bus Switch

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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 Aeroflex Microelectronics Solutions - HiRel




Aeroflex Circuit Technology

UT54BS3245 Datasheet Preview

UT54BS3245 Datasheet

8x1 Bus Switch

No Preview Available !

1
NC
2
AI
3
A2
4
A3
A4 5
A5 6
A6 7
A7 8
9
A8
10
VSS
20
VDD
19
/EN
18
B1
17
B2
16
B3
15
B4
14
B8
13
B7
12
B6
11
B5
Figure 2. UT54BS3245 Pinout
PIN DESCRIPTION
Pin No.
2, 3, 4, 5, 6, 7, 8, 9
11, 12, 13, 14, 15, 16,
17, 18
19
10
20
1
Name
nAn
nBn
/EN
V SS
V DD
NC
Description
Port A pins
Port B pins
Active LOW enable pin
Ground Pin
Supply Pin, +3.3V –or- +5.0V
No Connect
(electrically not connected to die)
TRUTH TABLE
INPUT (/EN)
L
H
Function
A port to B port
-or-
B port to A port
DISCONNECT
36-00-03-004
Ver. 1.0.0
2 Aeroflex Microelectronics Solutions - HiRel


Part Number UT54BS3245
Description 8x1 Bus Switch
Maker Aeroflex Circuit Technology
Total Page 11 Pages
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