AK2531 (1.5M) (6.3M) FEATURE J1(1.544Mbps) J2(6.312Mbps) cor

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AK2531 (1.5M) (6.3M) FEATURE J1(1.544Mbps) J2(6.312Mbps) cor

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[AK2531]
AK2531
(1.5M) (6.3M)
FEATURE J1(1.544Mbps) J2(6.312Mbps) cording transceiver(LIU) Jitter Tolerance: Compliant with ITU-T G.824 Transmitter Pulse Shape: Compliant with JT-G.703 Loss Signal Detection Line equalizer Local loopback function Crystal oscillator: 24.704MHz(1.5M), 25.248MHz(6.3M) Single 3.3V±5% 5.0V±5% Supply Power 160mW(typ:6.322Mbps) Package: 48pin LQFP
Transceiver
BLOCK DIAGRAM
XTALIN
XTALOUT BGREF
REF.
RCLK RPOS RNEG
Local Loopback
TCLK TPOS TNEG
PULSE SHAPER
TTIP TRING
CLOCK &DATA RECOVERY
LINE EQUALIZER
RTIP RRING
MS0079-E-00
2001/03
ASAHI KASEI GENERAL DESCRIPTION
[AK2531]
AK2531 J1/J2(JT-G.703) transceiver Leased line, MUX, Base station mobile communications etc. includes Pulse shaper, Line Driver, Clock Data Recovery, Detector, Crystal oscillator, etc. package. Internal equalizer automatically equalizes receive pulse attenuated cable loss.
ASSIGNMENTS
LPBCK
RESET
TEST4
TEST3
DR6M
PS3V
TEST2
AVDD
TEST1
AVSS
TPOS TNEG TCLK DVSS DVDD DGND RPOS RNEG RCLK
TRING TAVDD TAVSS TTIP TEST6 TEST5 RRING RTIP
(TOP VIEW)
XTALOUT
BGREF
XTALIN
EQCAP
RAVDD
EQBPS
RAVSS
PGND
MS0079-E-00
2001/03
[AK2531]
CONDITION
Name TPOS TNEG TCLK DVSS DVDD DGND RPOS RNEG RCLK PGND XTALOUT XTALIN RAVDD RAVSS BGREF EQCAP EQBPS RTIP RRING TEST5 TEST6 TTIP TAVSS
Type TTL/CMOS TTL/CMOS TTL/CMOS POWER POWER POWER CMOS CMOS CMOS CMOS
Load
Load
Comments
Note CMOS 3.3V CMOS 3.3V CMOS 3.3V
50pF 50pF 50pF 50pF
Note Note
POWER ANALOG ANALOG
Note
POWER POWER ANALOG 12kohm.
Connect +/-1% accuracy resister Note
ANALOG TTL/CMOS
100nF
Connect
+/-10%
accuracy capacitance TTL/5V,CMOS/3.3V Note Note
ANALOG ANALOG
Input impedance between both pins over
2kohm. Note
Note
ANALOG POWER
15pF
MS0079-E-00
2001/03
ASAHI KASEI Name TAVDD TRING TEST1 TEST2 TEST3 TEST4 AVSS AVDD DR6M PS3V RESET LPBCK TTL/CMOS CMOS TTL/CMOS TTL/CMOS POWER POWER
Note
[AK2531] TTL/CMOS Type POWER ANALOG 15pF
Note Note CMOS 3.3V
Load
Load
Comments
CMOS 3.3V Note CMOS 3.3V CMOS 3.3V
Note Should connected VSS. Note Should connected 3.3V operation 5.0V operation.
MS0079-E-00
2001/03
ASAHI KASEI DESCRIPTIONS Name TTIP TRING TPOS TNEG TCLK RTIP RRING RPOS RNEG RCLK Function Transmit Positive Data Output Transmit Negative Data Output Transmit Positive Data Input Incoming data sampled falling edge TCLK Transmit Negative Data Input Incoming data sampled falling edge TCLK Transmit clock Receive Positive Data Input Receive Negative Data Input Receive Positive Data Output Fixed level during status. Receive Negative Data Output Fixed level during status. Receive Clock Output Fixed level during status. Data Rate Select 6.322Mbps 1.544Mbps Power supply voltage select 3.3V Supply 5.0V Supply Equalizer bypass Disable Equalizer Enable Equalizer
[AK2531]
Comments
Signal Interface
Control Interface DR6M PS3V EQBPS RESET LPBCK
Reset Active High input. Fixed normal use. Loop back When LPBCK=High, TTIP TRING loop back RTIP RRING. Loss signal incoming signal lower than Loss signal threshold more than High. During loss status, incoming signal becomes higher than threshold, within
TEST1-4
Test These pins used only tests. Should fixed normal use. Test These pins used only tests. Should float normal use.
TEST5,6
MS0079-E-00
2001/03
[AK2531]
Name DVSS DVDD DGND PGND RAVDD RAVSS TAVSS TAVDD AVSS AVDD BGREF Others XTALOUT
Function Negative Power Supply Digital circuit Positive Power Supply Digital circuit Negative Power Supply Digital circuit Negative Power Supply Positive Power Supply analog circuit Negative Power Supply analog circuit Negative Power Supply analog circuit. Positive Power Supply analog circuit. Negative Power Supply analog circuit Positive Power Supply analog circuit Current reference resister should connected between this RAVSS. X-tal Input X-tal Output X-tal should connected between these pins. 1.544Mbps 24.704MHz 6.322Mbps 25.248MHz 20pF recommended value external capacitance connected between each these pins VSS.
Comments
Power Supply
XTALIN
EQCAP
Equalizer Stability Capatitor External capacitance (100nF±10%) should connected stabilize equalizer. connected. Must connected except pins. pins must left floating.
MS0079-E-00
2001/03
[AK2531]
ABSOLUTE MAXIMUM RATINGS
Parameter Supply
Symbol
-0.3
Units
Conditions Apply TAVDD, RAVDD, AVDD, DVDD
Ground Level
Apply Note
PGND,
TAVSS,
RAVSS, DVSS, DGND, AVSS
Digital Input Voltage Analog Input Voltage Input Current Storage Temperature
VDIN PGND-0.3V DVDD+0.3V VAIN PGND-0.3V RAVDD+0.3V Tstg
Note PGND TAVSS, RAVSS, DVSS, DGND, AVSS DGND DVSS
RECOMMENDED OPERATING COMDITIONS
Parameter Supply (3.3V mode) Supply (5.0V mode) Ambient Operating Temperature
Symbol RAVDD,TAVD DDVDD,AVDD
3.135 4.75
3.465 5.25
Units
Conditions 3.3V+/-5% 5.0V+/-5%
ELECTRICAL CHARACTERISTICS
Parameter Power Consumption VDD=3.3V VDD=5.0V 1.5M 6.3M 1.5M 6.3M Note 100% mark, Load 110ohm Note 100% mark, Load 75ohm
Symbol PDH1 PDH2 PDL1 PDL2
Units
Conditions
Note1 Note1 Note2 Note2
MS0079-E-00
2001/03
ASAHI KASEI ELECTRICAL CHARACTERISTICS
[AK2531]
CHARACTERISTICS Parameter 5.0V Supply (PS3V=Low) Digital High-Level Output Voltage Digital Low-Level Output Voltage Digital High-Level Input Voltage Digital Low-Level Input Voltage 3.3V Supply (PS3V=High) Digital High-Level Output Voltage Digital Low-Level Output Voltage Digital High-Level Input Voltage Digital Low-Level Input Voltage 0.7DVDD 0.3DVDD 0.9DVDD Except EQBPS PS3V (Note3) Digital Low-Level Input Voltage VILE EQBPS IOH=-40uA IOL=1.6mA 0.9DVDD IOH=-40uA IOL=1.6mA Symbol Units Conditions
Note PS3V should connected DVDD 3.3V Supply DVSS 5.0V Supply.
MS0079-E-00
2001/03
[AK2531]
RECEIVER Parameter Input Impedance Sensitivity 1.544Mbps Equalizer Equalizer 6.312Mbps Loss Signal Threshold Allowable Consecutive Zeros tolerance Generated Jitter Jitter Tolerance ITU-T G.824 0.02 Symbol -4.5 0.15 0.25 Units kohm UIpp Note EQBPS="H" Note EQBPS="L" Note Note Note Note Conditions
Note Relative value reference level with 110ohm cable. (3.15V0p±0.38) Note Relative value reference level with 75ohm cable. (2.0V0p±0.3%) Note Level line side transformer. Note device will tolerate consecutive zeros with PN20 pattern. Note frequency interference signal 700kHz(1.544Mbps) 3MHz(6.312Mbps).
JITTER TOLERANCE (1.544Mbps) Jitter Amplitude(UIpp) 0.01 1000 Jiiter Frequency(Hz) 10000 100000
JITTER TOLERANCE (6.312Mbps) Jitter Amplitude(UIpp) 0.01 1000 Jiiter Frequency(Hz) 10000 100000
MS0079-E-00
2001/03
ASAHI KASEI TRANSMITTER Parameter 1.544Mbps (DR6M=Low) Transmit Pulse Amplitude Transmit Pulse Width Transmit Pulse Under-Shoot Transmit Data Latency from TPOS/TNEG TTIP/TRING 6.312Mbps (DR6M=High) Transmit Pulse Shape Transmit Pulse Amplitude Normalized point Transmit Data Latency from TPOS/TNEG TTIP/TRING JT-G703 Note2 Note2 2.77 -0.25Va 0.75 3.15 3.53 -0.75Va JT-G703 Symbol Units
[AK2531]
Conditions
Note1
Note Measured line side transformer terminated with 110ohm. (isolated pulse: "1000") Note Measured line side transformer terminated with 75ohm. (isolated pulse: "1000") ISOLATED PULSE MASK
6.312Mbps (JT-G.703)
Voltage[V]
Time [20ns/div]
MS0079-E-00
2001/03
ASAHI KASEI CHARACTERISTICS (Clock/Data) Parameter Clock Frequency Duty Cycle Delay Time 1.544Mbps 6.312Mbps TCLK RCLK RCLK RNEG Setup/Hold Time from TCLK TPOS/TNEG Rise Time/Fall Time TCLK TPOS TNEG RCLK, RPOS, RNEG, Note Duty Cycle: tpwh/ tpwh tpwl 100%
tpwl tpwh
[AK2531]
Symbol TCLK fci1 fci2
1.544000
Units Condi- Notes tions ±50ppm ±30ppm
6.312000
Note Note 15pF load Fig.1 50pF load Fig.1 Fig.1
from RCLK RPOS/RNEG RPOS
15pF load Fig.2 50pF load Fig.2
RCLK TCLK
RPOS/RNEG TPOS/TNEG
50%valid
Fig.
Transmit/Receive Data Timing
Fig.
Rise Fall Time
RCLK,RPOS,RNEG,TCLK,TPOS,TNEG
MS0079-E-00
2001/03
[AK2531]
FUNCTIONAL DESCRIPTION POWER SUPPLY
AK2531 operates 3.3V 5.0V. PS3V should High 3.3V 5.0V. PS3V Power Supply 3.3V 5.0V
DATA TRANSFER RATE
AK2531 operates data rate 1.544 Mbps 6.312 Mbps. DR6M High, AK2531 goes into mode 6.312 Mbps, DR6M Low, AK2531 goes into mode 1.544 Mbps. Depending data rate, MCLK requires 24.704 1.544Mbps 25.248 6.312 Mbps. DR6M Data Transfer Rate 6.312Mbps 1.544Mbps MCLK 25.248MHz 24.704MHz
EXTERNAL COMPONENTS
external components shown table below should connected appropriate pins depending operation voltage data rate. 5.0V Supply
1.544Mbps 6.312Mbps
3.3V Supply
1.544Mbps 6.312Mbps
Turns Ratio Load Impedance Receive side Termination Crystal Frequency Characteristics
110ohm 24.704MHz
75ohm 37.5 25.248MHz
1:1.4 110ohm 24.704MHz
75ohm 37.5 25.248MHz
Described "Electrical Characteristics"
PULSE SHAPER
AK2531 samples transmit data TPOS TNEG pins falling edge TCLK. sampled incoming data converted signal output TTIP TRING pins. TCLK loss, data Space synchronized Xtal.
MS0079-E-00
2001/03
[AK2531]
LINE EQUALIZER
AK2531 equalizes line loss characteristics. EQBPS should shown below.
EQBPS
Equalizer Bypassed Enable
Conditions Cable twisted pair cable loss (1.544Mbps mode) twisted pair from 18dB cable loss (1.544Mbps mode) coax cable 4.5dB cable loss (6.312Mbps mode)
LOCAL LOOPBACK
LPBCK High, AK2531 makes transmit clock line driver output loopback receive clock data input. this mode, fixed "Low".
LPBCK
Mode Loopback TCLK TTIP TRING
Operation RCLK RTIP RRING
Normal Operation
LOSS SIGNAL
received signal level lower than threshold during 25ms(typ), AK2531 recognizes that status Loss signal goes "high". returns "low" within 125us after received signal level beyond threshold. states each shown below.
name Normal operation RCLK RPOS RNEG Recovered clock Recovered positive data Recovered negative data
STATE Loss signal
POWER RESET
When power supply AK2531 rises within 10ms, AK2531 will reset state 15ms (max guaranteed design).
MS0079-E-00
2001/03
[AK2531]
RECOMMENDED EXTERNAL CIRCUIT TRANSMITTER
AK2531 TTIPx TRING 0.47uF Condition 1.544Mbps, 3.3V Except above
RECEIVER
AK2531 RTIPx RRINGx 3.3V, 1.544Mbps 5.0V, 1.544Mbps 37.5 6.312Mbps 0.47uF Condition 1.544Mbps, 3.3V Except above
REFERENCE
k±1% resistor should connected determine internal reference current. recommended connect AK2531 short possible avoid noise. AK2531 BGREF
R1=12k±1%
MS0079-E-00
2001/03
[AK2531]
POWER SUPPLY
AK2531 paths power supply such DVDD-DVSS. decouple power supplies, shown below, capacitors should connected between those power supplies respectively. These should connected AK2531 short possible. table below shows typical recommended value. These values depend condition power supply line user's board. Please decide value capacitors based your evaluation. AK2531 TAVDD RAVDD AVDD DVDD TAVSS RAVSS AVSS DVSS name RAVDD-RAVSS, AVDD-AVSS DVDD-DVSS, TAVDD-TAVSS 0.01uF 0.1uF
EQUALIZER STABILITY CAPACITOR
AK2531 EQCAP
C1=100nF±10%
X-TAL
AK2531 XTALIN Xtal: 1.544Mbps 24.704 XTALOU 6.312Mbps 25.248 (Max 25pF)
MS0079-E-00
2001/03
[AK2531]
PACKAGE 48pin LQFP MARKING
(1)Pin indication
(2)Date Code: 7digits XXXXYZZ (3)Marketing Code: AK2531 (4)AKM Logo
AK2531
OUTLINE DIMENSIONS
Units:
9.0±0.4 1.4±0.1 1.7MAX
0.10 0.1±0.1
9.0±0.4
0.50
0.18+0.1 -0.05
0.125+0.05 -0.025
0.50±0.2
0°~10°
MS0079-E-00
2001/03
[AK2531]
IMPORTANT NOTICE These products their specifications subject change without notice. Before considering
application, consult Asahi Kasei Microsystems Co., Ltd. (AKM) sales office authorized distributor concerning their current status. assumes liability infringement patent, intellectual property, other right application information contained herein. export these products, devices systems containing them, require export license other official approval under regulations country export pertaining customs tariffs, currency exchange, strategic materials. products neither intended authorized critical components safety, life support, other hazard related device system, assumes responsibility relating such use, except with express written consent Representative Director AKM. used here: hazard related device system designed intended life support maintenance safety applications medicine, aerospace, nuclear energy, other fields, which failure function perform reasonably expected result loss life significant injury damage person property. critical component whose failure function perform reasonably expected result, whether directly indirectly, loss safety effectiveness device system containing which must therefore meet very high standards performance reliability. responsibility buyer distributor product distributes, disposes otherwise places product with third party notify that party advance above content conditions, buyer distributor agrees assume responsibility liability hold harmless from claims arising from said product absence such notification.
MS0079-E-00
2001/03

AK2531 (1.5M) (6.3M) FEATURE J1(1.544Mbps) J2(6.312Mbps) cor

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