cbtl02042a NXP Semiconductors, cbtl02042a Datasheet - Page 4

• Manufacturer Part Number: cbtl02042a
• Description: 3.3 V, 2 Differential Channel, 2 1 Multiplexer/demultiplexer Switch For Pci Express Gen2
• Manufacturer: NXP Semiconductors

NXP Semiconductors
7. Functional description
CBTL02042A_CBTL02042B
Product data sheet
7.1 Function selection and shutdown function
Table 2.
[1]
Refer to
The CBTL02042A/B provides a shutdown function to minimize power consumption when
the application is not active, but power to the CBTL02042A/B is provided. The XSD pin
(active HIGH) places all channels in high-impedance state (non-conducting) while
reducing current consumption to near-zero. When XSD pin is LOW, the device operates
normally.
Table 3.
X = Don’t care.
Symbol
XSD
V
GND
XSD
HIGH
LOW
LOW
DD
DHVQFN20 package die supply ground is connected to both GND pins and exposed center pad. GND pins
and the exposed center pad must be connected to supply ground for proper device operation. For
enhanced thermal, electrical, and board level performance, the exposed pad needs to be soldered to the
board using a corresponding thermal pad on the board and for proper heat conduction through the board,
thermal vias need to be incorporated in the printed-circuit board in the thermal pad region.
[1]
Figure 1 “Functional diagram of CBTL02042A;
Pin
CBTL02042A
2
1, 6, 10
5, 11, 20,
center pad
Pin description
Function selection
SEL
X
LOW
HIGH
All information provided in this document is subject to legal disclaimers.
3.3 V, 2 differential channel, 2 : 1 MUX/deMUX switch for PCIe Gen2
Rev. 1 — 10 March 2011
…continued
Function
An, Bn and Cn pins are high-Z
An to Bn and vice versa
An to Cn and vice versa
CBTL02042B
19
11, 16, 20
1, 10, 15,
center pad
CBTL02042A; CBTL02042B
Type
CMOS
single-ended
input
power
power
CBTL02042B”.
positive supply voltage,
Description
Shutdown pin; should be driven
LOW or connected to V
normal operation. When HIGH, all
paths are switched off
(non-conducting high-impedance
state), and supply current
consumption is minimized.
3.3 V (± 10 %)
supply ground
© NXP B.V. 2011. All rights reserved.
SS
for
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