DS1864T+ Maxim Integrated Products, DS1864T+ Datasheet - Page 41

• Manufacturer Part Number: DS1864T+
• Description: IC LASER CTRLR 1CHAN 5.5V 28TQFN
• Manufacturer: Maxim Integrated Products
• Type: Laser Diode Controller (Fiber Optic)r

Specifications of DS1864T+

• Number Of Channels: 1
• Voltage - Supply: 2.97 V ~ 5.5 V
• Current - Supply: 3mA
• Operating Temperature: -40°C ~ 95°C
• Package / Case: 28-WFQFN Exposed Pad
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 01h In Default DS1852 Configuration, (Table 00h in DS1859 Configuration)
Register Descriptions
Lower Memory Register 7Fh: Table Select Byte
POWER-ON VALUE:
MEMORY TYPE:
The upper memory tables of the DS1864 are selected by writing the desired Table value in this register. For example, if Table 04h is
to be selected, the value 04h will be written to register 7Fh. The Power On value of the Table Select Byte is determined by the value
written in Table 04h (Table 01h in DS1859 configuration), register C7h.
Lower Memory Register 7Bh to 7Eh: Password Entry Bytes
POWER-ON VALUE:
MEMORY TYPE:
The password is entered into the four bytes to gain PW1 or PW2 level access. There are two levels of passwords for the DS1864.
The lower level password (PW1) will have access to unprotected areas plus those made available with PW1. The higher level
password (PW2) will have all of the access of PW1 plus those made available with PW2. See the Memory Protection section for
details on password access.
Table 01h (Table 00h in DS1859 Configuration), 80h to F7h: User Memory
FACTORY DEFAULT:
MEMORY TYPE:
This is general use EEPROM.
80h to F7h
7Bh
7Ch
7Dh
7Eh
7Fh
bit7
bit7
bit7
2
2
2
2
0
31
23
15
7
See below
0000 0000h
00h
2
2
2
Volatile (SRAM)
Nonvolatile (EEPROM)
Volatile (SRAM)
2
0
30
22
14
6
____________________________________________________________________
2
2
2
2
0
29
21
13
5
SFP Laser Controller and
2
2
2
2
0
28
20
12
4
EEPROM
2
2
2
2
0
27
19
11
3
2
2
2
2
2
Diagnostic IC
26
18
10
2
2
2
2
2
2
2
25
17
1
9
1
bit0
bit0
bit0
2
2
2
2
2
24
16
8
0
0
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