BCT644
2:1 MIPI D-PHY(1.5Gbps)
4-Data Lane Switch
BCT644
2:1 MIPI D-PHY(1.5Gbps)
GENERAL DESCRIPTION
The BCT644 is a four-data-lane, MIPI, D-PHY
switch. This single-pole, double-throw (SPDT)
switch is optimized for switching between two
high-speed or low-power MIPI sources. The
BCT644 is designed for the MIPI specification and
allows connection to a CSI or DSI module.
4-Data Lane Switch
FEATURES
Switch Type: SPDT(10x)
Signal Types: MIPI, D-PHY
V
CC
:1.65 to 4.5V
Input Signals: 0 to V
CC
R
ON
: 7.7Ω Typical HS MIPI
8.8Ω Typical LP MIPI
ΔR
ON
: 0.6Ω Typical
R
ON_FLAT
: 0.3Ω Typical
I
CCZ
: 0.5uA Maximum
I
CC
: 26uA Typical
Q
IRR
:-32dB Typical
X
TALK
:-45dB Typical
Bandwidth:1.6GHz Typical
C
ON
:5.2pF
36-Ball WLCSP Package
APPLICATIONS
Cellular Phones, Smart Phones
Displays
ORDERING INFORMATION
Order Number
BCT644EWX-TR
Package Type
WLCSP-36
Temperature
Range
-40° to +85°
C
C
Marking
644
QTY/Reel
3000
REV1.8
www.broadchip.com
Copyright © BROADCHIP TECHNOLOGY CO., LTD
1
BCT644
2:1 MIPI D-PHY(1.5Gbps)
4-Data Lane Switch
TYPICAL OPERATING CIRCUIT
CLK
MIPI
Module #1
CSI/DSI
Data[1:4]
CLK
BCT644
CLK
MIPI
Module #2
CSI/DSI
Data[1:4]
Data[1:4]
4-Data Lane
MIPI Switch
Processor
Figure 1.
Application Block Diagram
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V
CC
)…............................-0.5V to +5.25V
DC Input Voltage (SEL, /OE) ....................-0.5V to V
CC
V
DC Switch I/O Voltage...............................-0.5V to 5.25V
DC Input Diode Current.........................................-50mA
DC Output Current ……….....................................50mA
Storage Temperature Range..................-65℃ to +150℃
Junction Temperature.............................................150℃
Operating Temperature Range.................-40℃ to +85℃
Lead Temperature (Soldering, 10 sec)....................260℃
ESD Susceptibility
All Pins......................................................................4KV
I/O to GND................................................................4KV
Power to GND.......................... .................................8KV
(1)
CAUTION
This integrated circuit can be damaged by ESD if you don’t
pay attention to ESD protection. Broadchip recommends
that all integrated circuits be handled with appropriate
precautions. Failure to observe proper handling and
installation procedures can cause damage. ESD damage
can range from subtle performance degradation to
complete device failure. Precision integrated circuits may
be more susceptible to damage because very small
parametric changes could cause the device not to meet its
published specifications.
Broadchip reserves the right to make any change in circuit
design, specification or other related things if necessary
without notice at any time. Please contact Broadchip sales
office to get the latest datasheet.
REV1.8
www.broadchip.com
Copyright © BROADCHIP TECHNOLOGY CO., LTD
2
BCT644
2:1 MIPI D-PHY(1.5Gbps)
4-Data Lane Switch
RECOMMENDED OPERATING CONDTIONS
The Recommended Operating Conditions table defines the conditions for actual device operation.
Recommended operating conditions are specified to ensure optimal performance to the datasheet
specifications.
Symbol
Parameter
Min.
Max.
Unit
V
CC
Supply Voltage
1.65
4.5
V
(2)
V
CTRL
Control Input Voltage(SEL, /OE)
0
V
CC
V
Switch I/O Voltage (CLKn, HS Mode
0.1
0.3
V
SW
V
CLKAn, CLKBn, Dn, DAn, DBn)
LP Mode
0
1.2
℃
T
A
Operating Temperature
-40
+85
Notes：
1. The input and output negative ratings maybe exceed if the input and output diode current ratings are observed.
2. The control input must be held HIGH or LOW; it must not float.
PIN CONFIGURATION
Figure2. Pin Configuration(Top Through View)
REV1.8
www.broadchip.com
Copyright © BROADCHIP TECHNOLOGY CO., LTD
3
BCT644
2:1 MIPI D-PHY(1.5Gbps)
4-Data Lane Switch
Table 1. Ball-to-Pin Mappings
Ball
Pin Name
A1
CLKN
A2
CLKP
A3
CLKAP
A4
DA1P
A5
DA2P
A6
DA2N
B1
D1N
B2
D1P
B3
CLKAN
B4
DA1N
B5
DA3P
B6
DA3N
C1
D2N
C2
D2P
C3
NC
C4
VCC
C5
DA4P
C6
DA4N
D1
D3N
D2
D3P
D3
GND
D4
NC
D5
CLKBN
D6
CLKBP
E1
D4N
E2
D4P
E3
DB4P
E4
DB3P
E5
DB1N
E6
DB1P
F1
/OE
F2
SEL
F3
DB4N
F4
DB3N
F5
DB2N
F6
DB2P
TRUTH TABLE
SEL
LOW
HIGH
X
/OE
LOW
LOW
HIGH
Function
CLKP=CLKAP, CLKN=CLKAN, DN(P/N)=DAN(P/N)
CLKP=CLKBP, CLKN=CLKBN, DN(P/N)=DBN(P/N)
DAN(P/N), DBN(P/N) Data Ports High Impedance
REV1.8
www.broadchip.com
Copyright © BROADCHIP TECHNOLOGY CO., LTD
4
BCT644
2:1 MIPI D-PHY(1.5Gbps)
4-Data Lane Switch
PIN DESCRIPTION
Pin Name
CLKP/N
D1P/N
D2P/N
D3P/N
D4P/N
CLKAP/N
DA1P/N
DA2P/N
DA3P/N
DA4P/N
CLKBP/N
DB1P/N
DB2P/N
DB3P/N
DB4P/N
Description
Common Clock Path
Common Data Path1
Common Data Path2
Common Data Path3
Common Data Path4
A-Side Clock Path
A-Side Data Path 1
A-Side Data Path 2
A-Side Data Path 3
A-Side Data Path 4
B-Side Clock Path
B-Side Data Path 1
B-Side Data Path 2
B-Side Data Path 3
B-Side Data Path 4
SEL=0
SEL
SEL=1
/OE
Figure 3. Analog Symbol
VCC
GND
NC
CLKP=CLKAP,
CLKN=CLKAN,
DN(P/N)=DAN(P/N)
CLKP=CLKBP,
CLKN=CLKBN,
DN(P/N)=DBN(P/N)
Output Enable
Power
Ground
No Connect
REV1.8
www.broadchip.com
Copyright © BROADCHIP TECHNOLOGY CO., LTD
5
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