DS90C124 Datasheet, PDF (13/17 Pages) National Semiconductor (TI) – 5-35MHz DC-Balanced 24-Bit LVDS Serializer and Deserializer

Pin Descriptions
Pin # Pin Name
I/O
Description
DS90C241 SERIALIZER PIN DESCRIPTIONS
22
VDDDR
VDD
Analog Voltage Supply, LVDS O/P Power
21
VSSDR
GND
Analog Ground, LVDS O/P 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
VSSESD
GND
ESD Ground
4-1, DIN[23:0]
CMOS_I
Transmitter Data INputs
48-44,
41-32,
29-25
10
TCLK
CMOS_I
Transmitter reference CLocK.
Used to strobe data at the DIN inputs and to drive the transmitter PLL
9
TPWDNB
CMOS_I
Transmitter PoWer DowN Bar (ACTIVE L).
TPWDNB = L; Disabled, DOUT (+/-) are TRI-STATED stand-by mode, PLL is shutdown
TPWDNB = H; Enabled
18
DEN
CMOS_I
Data ENable (ACTIVE H)
DEN = L; Disabled, DOUT (+/-) are TRI-STATED, PLL still operational
DEN = H; Enabled
13
RESRVD
CMOS_I
RESERVED - tie Low
23
PRE
CMOS_I
PRE-emphasis select pin.
PRE = (R_PRE ≥ 3 kΩ); I_max = (1.2/R*20), R_min = 3 kΩ
PRE = H or floating; pre-emphasis off
11
TRFB
CMOS_I
Transmitter Rising/Falling Bar Clock Edge Select (H = rising edge L = falling edge)
12
VODSEL
CMOS_I
VOD level SELect
VODSEL = L; IOD ≈ 3.5 mA, (default). e.g. 3.5 mA*100Ω≈350 mV
VODSEL = H; IOD ≈ 7.0 mA, VOD doubles approximately. e.g. 7 mA*100Ω ≈ 700 mV
5
DCAOFF
CMOS_I
RESERVED — tie Low
8
DCBOFF
CMOS_I
RESERVED — tie Low
20
DOUT+
LVDS_O
Transmitter LVDS true (+) OUTput
19
DOUT−
LVDS_O
Transmitter LVDS inverted (-) OUTput
DS90C124 DESERIALIZER PIN DESCRIPTIONS
39
VDDIR
VDD
Analog LVDS Voltage supply, Power
40
VSSIR
GND
Analog LVDS Ground
47
VDDPR0
VDD
Analog Voltage supply, PLL Power
46
VSSPR0
GND
Analog Ground, PLL Ground
45
VDDPR1
VDD
Analog Voltage supply, PLL VCO Power
44
VSSPR1
GND
Analog Ground, PLL VCO Ground
37
VDDR1
VDD
Digital Voltage supply, Logic Power
38
VSSR1
GND
Digital Ground, Logic Ground
36
VDDR0
VDD
Digital Voltage supply, Logic Power
35
VSSR0
GND
Digital Ground, Logic Ground
30
VDDOR1
VDD
Digital Voltage supply, LVTTL O/P Power
13
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