AK2504A Datasheet, PDF (7/30 Pages) List of Unclassifed Manufacturers – DS3/STS-1/ES Transceiver

ASAHI KASEI
[AK2504A]
Transmit
No. Pin Name I/O
Function
24 TPDATA
25 TNDATA
23 TCLK
6 TCKPOL
Transmit Positive Data/NRZ data
I
This pin’s function depends on the input level.
NRZ = Low : Positive AMI data output
NRZ = High : NRZ data
Transmit Negative Data
I
This pin’s function depends on the input level.
NRZ = Low : Negative AMI data output
NRZ = High : Should be tied to VSS
Transmit Clock
I TPDATA and TNDATA are sampled on the rising or falling edge of TCLK.
Sampling edge must be assigned by TCKPOL pin.
TCLK Polarity select.
I TCKPOL=Low : Transmit data is sampled on the rising edge of TCLK.
TCKPOL=High : Transmit data is sampled on the falling edge of TCLK.
39 TTIP
37 TRING
56 PLA
O _{Transmit Tip / Ring Output}
O ^{AMI signal output. Requires a 1:1CT transformer. Hi-Z when RESET = Low.}
Pulse Level Adjustment
Transmit pulse level can be adjusted by the external resister.
I Normally 1.33kΩ is connected for DS3/STS-1 or 1.27kΩ for E3.
If the signal power level is larger than a requirement, you can tweak
it by increasing the value of this resister.
NRZ mode Enable
Active High input enables NRZ data interface with TPDATA and RPDATA.
3 NRZ
I
NRZ TPDATA TNDATA RPDATA RNDATA
0
Positive Negative Positive Negative
1
NRZ (VSS)
NRZ LCV
In NRZ mode, TNDATA should be tied to VSS and RNDATA indicates LCV.
Line Built Out
If LBO is set to High, Line Built Out function is enable.
60 LBO
LBO input Cable length
I
Low
225 – 450ft
High
0 – 225ft
30 TCAP1
28 TCAP2
35 TAOS
36 VDDT
29,
38
VSST
This pin is active only with E3 pin set to High(DS3/STS-1 mode).
O
Reference Voltage Output for the TX driver.
An external capacitor (0.1µF±20%) should be connected to VSSA.
O
Reference Voltage Output for the TX driver.
An external capacitor (0.1µF±20%) should be connected to VSSA.
Transmit All Ones Select
I Active High input. A continuous AMI all 1’s pattern to be transmitted from
TTIP and TRING. Transmit rate is defined by TCLK.
- Power Supply for Transmitter. +3.3 volts.
- Ground for Transmitter. 0 volts
MS0143-E-01
-7-
2004/01