FIN12AC_08 Datasheet, PDF (3/21 Pages) Fairchild Semiconductor – Low-Voltage 12-Bit Bi-Directional Serializer/Deserializer with Multiple Frequency Ranges

Terminal Descriptions
Pin Name
I/O Type
Number of
Terminals
Description of Signals
DP[1:12]
I/O
12
LVCMOS parallel I/O, Direction controlled by DIRI pin
CKREF
IN
1
LVCMOS clock input and PLL reference
STROBE
IN
1
LVCMOS strobe signal for latching data into the serializer
CKP
OUT
DSO+ / DSI-
DSO- / DSI+
DIFF-I/O
1
LVCMOS word clock output. This signal is the regenerated STROBE
signal
CTL differential serial I/O data signals⁽¹⁾
DSO: Refers to output signal pair
2
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
CTL differential deserializer input bit clock
2
CKSI: Refers to signal pair
CKSI+: Positive signal of CKSI pair
CKSI-: Negative signal of CKSI pair
CTL differential deserializer output bit clock
CKSO+ / CKSO- DIFF-OUT
2
CKSO: Refers to signal pair
CKSO+: Positive signal of CKSO pair
CKSO-: Negative signal of CKSO pair
S1
IN
1
Used to define frequency range for the RefClock, CKREF.
S2
IN
1
PLLx_SEL
IN
Used to define PLL multiplication mode.
1
PLLX_SEL = 0 multiplication factor 7-1/3x
PLLX_SEL = 1 multiplication factor 7x
LVCMOS control input. Used to control direction of data flow:
DIRI
IN
1
DIRI = “1” Serializer
DIRI = “0” Deserializer
DIRO
OUT
1
LVCMOS 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 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 pins have been arranged such that if one device is rotated 180° with respect to the other
device, the serial connections properly aligns without the need for any traces or cable signals to cross. Other layout
orientations may require that traces or cables cross.
© 2006 Fairchild Semiconductor Corporation
FIN12AC Rev. 1.1.2
3
www.fairchildsemi.com