AK2504A Datasheet, PDF (6/30 Pages) List of Unclassifed Manufacturers – DS3/STS-1/ES Transceiver

ASAHI KASEI
[AK2504A]
PIN DESCRIPTION
Receive
No. Pin Name I/O
Function
Loss of Signal Threshold Control (See Table 15)
42 LOSTHR I The voltage forced on this pin controls the input loss-of-signal threshold.
Two settings are provided by forcing VSS or VDD.
Receive PLL Loss-of-Lock
14 RLOL
O Active High alarm. If the recovered clock frequency is larger than
approximately 0.5% of EXCLK, RLOL alarm goes High.
45 RTIP
I
Receive Tip Input
Receive input for differential AMI signal. Requires a 1:1 transformer.
44 RRING
Receive Ring Input
Receive input for differential AMI signal. Requires a 1:1 transformer.
62 RLOS
O
Receive Loss-of-Signal.
This pin is set high on loss of the incoming signal at RIN.
External Reference Clock.
7 EXCLK
I A valid DS3/STS-1/E3 clock must be provided at this input. The EXCLK
frequency determines the operating frequency of the device.
20 RCLK
O Recovered Clock.
22
RNDATA
/LCV
21 RPDATA
41 RCKPOL
Receive Negative Data/Line Code Violation Indicator
This pin’s function depends on the input level.
NRZ = Low : Receive Negative Data output
O
NRZ = High : Bipolar Violation Output
1 bit period of High level signal is output if a bipolar violation not
corresponding to the appropriate coding rule or a code error is detected in the
incoming data stream. The violation pulse corresponding to the appropriate
coding rule is removed from the incoming data.
Receive Positive Data
O
This pin’s function depends on the input level.
NRZ = low : Receive Positive Data output
NRZ = high : NRZ data output
RCLK Polarity select.
I RCKPOL=L : Received data is output on the rising edge of RCLK.
RCKPOL=H : Received data is output on the falling edge of RCLK.
51 EQDIS
I Equalizer Disable. When EQDIS=H, Equalizer is disable.
59 VDDA
- Power Supply for ADC. +3.3 volts.
52 VDDV
- Power Supply for VGA. +3.3 volts.
53 VSSV
- Ground for VGA. 0 volts.
4 VDDP
- Power Supply for PLL. +3.3 volts
5 VSSP
- Ground for PLL. 0 volts.
54 VDDB
- Power Supply for Bandgap Reference. +3.3 volts.
57 VSSB
- Ground for Bandgap Reference. 0 volts.
MS0143-E-01
-6-
2004/01