DS90UR241 Datasheet, PDF (13/24 Pages) National Semiconductor (TI) – 5-43 MHz DC-Balanced 24-Bit LVDS Serializer and Deserializer

Pin Descriptions
Pin # Pin Name
I/O/PWR
Description
DS90UR241 SERIALIZER PIN DESCRIPTIONS
22
VDDDR
VDD
Analog Voltage supply, LVDS Output POWER
21
VSSDR
GND
Analog Ground, LVDS Output GROUND
16
VDDPT0
VDD
Analog Voltage supply, VCO POWER
17
VSSPT0
GND
Analog Ground, VCO GROUND
14
VDDPT1
VDD
Analog Voltage supply, PLL POWER
15
VSSPT1
GND
Analog Ground, PLL GROUND
30
VDDT
VDD
Digital Voltage supply, Tx serializer POWER
31
VSST
GND
Digital Ground, Tx serializer GROUND
7
VDDL
VDD
Digital Voltage supply, Tx Logic POWER
6
VSSL
GND
Digital Ground, Tx Logic GROUND
42
VDDIT
VDD
Digital Voltage supply, Tx INPUT POWER
43
VSSIT
GND
Digital Ground, Tx Input GROUND
24
RESVRD
CMOS_I
RESeRVeD MUST tie LOW
4-1, D_IN[23:0]
48-44,
CMOS_I
Transmitter Data INputs
41-32,
29-25
10
TCLK
CMOS_I
Transmitter reference CLocK.
Used to strobe data at the D_IN inputs and to drive the transmitter PLL
9
TPWDNB
CMOS_I
Transmitter PoWer DowN Bar (ACTIVE L).
TPWDNB = L; Disabled, D_OUT (+/-) are TRI-STATED stand-by mode, PLL is shutdown
TPWDNB = H; Enabled
18
DEN
CMOS_I
Data ENable (ACTIVE H)
DEN = L; Disabled, D_OUT (+/-) are TRI-STATED, PLL still operational
DEN = H; Enabled
13
RESRVD
CMOS_I
RESeRVeD - MUST tie Low
23
PRE
CMOS_I
PRE-emphasis select pin.
PRE = (R_PRE ≥ 6 kΩ); I_max = [(1.2/R) x 20 x 2], R_min = 6 kΩ
PRE = H or floating; pre-emphasis is disabled
11
TRFB
CMOS_I
Transmitter Rising/Falling Bat Clock Edge Select
TRFB = L; falling edge
TRFB = H; rising edge
12
RAOFF
CMOS_I
Additional RAndomizer OFF. (ACTIVE H)
RAOFF = L; (default) Additional randomization ON
RAOFF = H; backwards compatible with DS90C124
5
RESVRD
CMOS_I
RESeRVeD MUST tie LOW
8
RESVRD
CMOS_I
RESeRVeD MUST tie LOW
20
D_OUT+
LVDS_O
Transmitter LVDS true (+) OUTput
19
D_OUT−
LVDS_O
Transmitter LVDS inverted (-) OUTput
DS90UR124 DESERIALIZER PIN DESCRIPTIONS
51
VDDIR
VDD
Analog LVDS Voltage supply, POWER
52
VSSIR
GND
Analog LVDS GrouND
59
VDDPR0
VDD
Analog Voltage supply, PLL POWER
58
VSSPR0
GND
Analog Ground, PLL GROUND
57
VDDPR1
VDD
Analog Voltage supply, PLL VCO POWER
56
VSSPR1
GND
Analog Ground, PLL VCO GROUND
32
VDDR1
VDD
Digital Voltage supply, LOGIC POWER
31
VSSR1
GND
Digital Ground, Logic GROUND
13
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