FIN24C_06 Datasheet, PDF (3/25 Pages) Fairchild Semiconductor – uSerDes™Low-Voltage 24-Bit Bi-Directional Serializer/Deserializer

Terminal Description
Terminal
Number of
Name
I/O Type Terminals
Description of Signals
DP[1:20]
I/O
20
LVCMOS Parallel I/O, direction controlled by DIRI Terminal
DP[21:24]
I or O
4
LVCMOS Parallel Unidirectional Inputs or Outputs Dependent on State of
S1, S2 Terminals
CKREF
IN
1
LVCMOS Clock Input and PLL Reference
STROBE
IN
1
LVCMOS Strobe Signal for Latching Data into the Serializer
CKP
OUT
1
LVCMOS Word Clock Output
DSO+ / DSI–
DSO– / DSI+
DIFF-I/O
2
CTL Differential Serial I/O Data Signals(1)
DSO: Refers to output signal pair
DSI: Refers to input signal pair
DSO(I)+: Positive signal of DSO(I) pair
DSO(I)–: Negative signal of DSO(I) pair
CKSI+, CKSI– DIFF-IN
2
CTL Differential Deserializer Input Bit Clock
CKSI: Refers to signal pair
CKSI+: Positive signal of CKSI pair
CKSI–: Negative signal of CKSI pair
CKSO+, CKSO– DIFF-OUT
2
CTL Differential Serializer Output Bit Clock
CKSO: Refers to signal pair
CKSO+: Positive signal of CKSO pair
CKSO–: Negative signal of CKSO pair
S1
IN
1
LVCMOS Mode Selection Pins used to define mode of operation for some
S2
IN
1
terminals. The control terminals, DP[21:24] can be set as 4 terminals in the
same direction or two in each direction.
DIRI
IN
1
LVCMOS Control Input
Used to control direction of Data Flow
DIRO
OUT
1
LVCMOS Control Output
Inversion of DIRI
V_DDP
V_DDS
V_DDA
GND
Supply
Supply
Supply
Supply
1
Power Supply for Parallel I/O and Translation Circuitry
1
Power supply for core circuitry and serial I/O
1
Power Supply for Analog PLL Circuitry
0
Use Bottom Ground Plane for Ground Signals
Note:
1. The DSO/DSI serial port terminals have been arranged such that when one device is rotated 180° to the other device,
the serial connections properly align without the need for any traces or cable signals to cross. Other layout
orientations may require that traces or cables cross.
©2005 Fairchild Semiconductor Corporation
FIN24C Rev. 1.0.2
3
www.fairchildsemi.com