ASAHI KASEI
[AK2573A]
Ⅰ. Pin Description
The symbol of I/O row shows below.
Ai: Analog input, Ai_l: LVPECL input, Ao: Analog output
Di: Digital input, Di_pu: Digital input with pulled-up resistor, Do: Digital output, Dio: Digital input / output,
Do_od: Digital output (open drain), Dio_od: Didital input / output (open drain)
PWR: Power or VSS
PIN# Symbol
Function
I/O
Remark
1
2
3
4
NC
No Connection. Connect to the VSS or leave open.
Positive LVPECL data input. Input Inpedance >= 10kΩ
Negative LVPECL data input. Input Indedance >= 10kΩ
“H” for latched data with clock. “L” for direct data.
DATAP
DATAN
SEL
Ai_l
Ai_l
Di
Do not
leave open
5
6
CLKP
CLKN
Positive LVPECL clock input. Connect to VSS when SEL =“L”. Ai_l
Negative LVPECL clock input. Connect to VDD or leave open Ai_l
when SEL = “L”.
7
WP
Di_pu
Write Protect. Internally pulled-up with 20kΩ (typ).
“H” sets device address 101000 and only user area of EEPROM
can access as read-only. “L” sets device address as 1010 and full
of EEPROM can access as read/write. For more information, see
Table 8-2 and 9-1.
8
9
TXDIS1
TXDIS2
TX Disable.
Di
Do not
leave open
“H” for disable MOD and BIAS current. TXDIS1 and TXDIS2
are ORed internally. Use 4.7kΩ or more for externally pulled-up
or pulled-down.
10
11
DVDD
TXFAULT
Power supply for digital circuit.
TX Fault detection output (Open drain). Connect to VDD with Do_od AC load
PWR
4.7kΩ to 10kΩ resistor.
≤ 100pF
Set “H” when detect TEMPALM, CURRALM, OPTALM or
DATAALM.
When set RE_SFP=1 and detect the ALM, TXFAULT is kept
“H” until receiving disable request at TXDIS1 or TXDIS2.
No Connection. Connect to the VSS or leave open.
12
13
NC
SDA
Serial data input / output (Open drain). Connect to VDD with Dio_od AC Load
4.7k to 10k resistor.
≤ 100pF
Do not
leave open
Do not
leave open
14
SCL
Serial clock input. The data (SDA) is shifted in at the rising edge Di
of SCL and is shifted out at the falling edge of SCL.
15
16
17
DVSS
NC
VSS for digital circuit.
No Connection. Connect to the VSS or leave open.
PWR
DATAALM Sets the alarm when detects 1’s or 0’s sequential data input. The Do
detection time is 4.5us (typ).
AC Load
≤ 30pF
The polarity can be set with EEPROM.
18
19
OPTALM
Sets the alarm when detects monitor PD current drop.
The polarity can be set with EEPROM.
Do
AC Load
≤ 30pF
AC Load
≤ 30pF
CURRALM Sets the alarm when detects the over current of I-DAC1 or Do
I-DAC2.
Alarm level can be set every 6℃.
The polarity can be set with EEPROM.
<MS0189-E-01>
-4-
2004/5
AKM [ ASAHI KASEI MICROSYSTEMS ]
