HDMP-1032 Datasheet, PDF (19/32 Pages) Agilent(Hewlett-Packard) – 1.4 GBd Transmitter/Receiver Chip Set with CIMT Encoder/Decoder and Variable Data Rate

HDMP-1034 (Rx) Pin Definition (continued)
CDR/Clock Generator
Name
Pin
Type Signal
RXCAP0
RXCAP1
32
C
Loop Filter Capacitor: A 0.1 µF min. loop filter capacitor, C2, must
33
be connected across RXCAP0 and RXCAP1 for all combinations
of RXDIV1/RXDIV0. See Figure 12.
REFCLK
11
I-TTL Reference Clock Input: The Rx PLL uses this input for frequency
lock. In addition, RX[0-15], RXFLAG, RXDATA, RXCNTL, RXREADY,
RXERROR, and RXDSLIP are clocked out on the rising edge of
REFCLK when PASSENB=1.
RXDIV0
RXDIV1
28
I-TTL VCO Divider Select: These pins program the VCO divider chain
29
to operate at full, half, or quarter speed. See Typical Operating
Rates table and Figure 2.
RXCLK0
RXCLK1
37
O-TTL Recovered Word-Rate Clock Outputs: These outputs are the PLL
38
recovered word rate clocks. RX[0-15], RXFLAG, RXDATA,
RXCNTL, RXREADY, RXERROR, and RXDSLIP are clocked out on
the falling edge of RXCLK1 when PASSENB=0. RXCLK0 is the
inverse of RXCLK1.
Power Supply/Ground
V_CC
9
S
Power Supply: Normally 3.3 volts. This power supply is used for
24
all the core logic other than the output drivers.
40
V_CC_TTL
7
S
TTL Power Supply: Normally 3.3 volts. Used for all TTL receiver
42
input and output buffer cells.
49
57
64
V_CC_HS
16
S
High-Speed Supply: Normally 3.3 volts. This supply is used to
provide clean references for the high-speed inputs, HSIN+
and HSIN-.
V_CC_A
30
S
Analog Power Supply: Normally 3.3 volts. This supply is used to
feed power to the analog section of the chip.
GND
10
S
Ground: Normally 0 volts. Tie to ground.
25
39
56
GND_TTL
1
8
41
48
S
TTL Ground: Normally 0 volts. Tie to ground.
GND_HS
17
S
High-Speed Input Ground: When tied to ground, the input
20
impedance of HSIN+ and HSIN- are each matched to 50 Ω. In
order to obtain high impedance (high-Z) inputs for 1:N broadcast
applications, 18 KΩ series resistors to -5 V are recommended.
GND_A
31
S
Analog Ground: Normally 0 volts. This ground is used for the
analog PLL portion of the chip.
19