DS1993L-F5+ Maxim Integrated Products, DS1993L-F5+ Datasheet - Page 9

• Manufacturer Part Number: DS1993L-F5+
• Description: IBUTTON MEMORY 4KBit F5
• Manufacturer: Maxim Integrated Products
• Series: iButton®r
• Type: Memory iButtonr

Specifications of DS1993L-F5+

• Rohs Information: IButton RoHS Compliance Plan
• Memory Size: 512B
• Memory Type: NVRAM
• Maximum Operating Temperature: + 70 C
• Package / Case: F5 MicroCan
• Minimum Operating Temperature: - 40 C
• Memory Configuration: 128K X 8
• Supply Voltage Range: 2.8V To 6V
• Memory Case Style: Micro Can
• Operating Temperature Range: -40°C To +70°C
• Filter Terminals: SMD
• Memory Voltage, Vcc: 2.8V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

MEMORY FUNCTION EXAMPLES
Example: Write two data Bytes to memory locations 0026h and 0027h (the seventh and eighth Bytes of
page 1). Read entire memory.
MASTER MODE
RX
RX
RX
RX
RX
RX
RX
RX
RX
RX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
<128 Bytes (DS1992)>
<512 Bytes (DS1993)>
DATA (LSB FIRST)
<2 data Bytes>
<2 data Bytes>
Presence
Presence
Presence
Presence
Presence
Reset
Reset
Reset
Reset
Reset
CCh
CCh
CCh
CCh
Aah
0Fh
F0h
26h
00h
26h
00h
07h
55h
26h
00h
07h
00h
00h
9 of 17
COMMENTS
Reset pulse (480s to 960s)
Issue skip ROM command
Issue write scratchpad command
TA1, beginning offset = 6
TA2, address = 0026h
Write 2 Bytes of data to scratchpad
Reset pulse
Issue skip ROM command
Issue read scratchpad command
Read TA1, beginning offset = 6
Read TA2, address = 0026h
Read E/S, ending offset = 7, flags = 0
Reset pulse
Issue skip ROM command
Issue copy scratchpad command
TA2 AUTHORIZATION CODE
E/S
Reset pulse
Issue skip ROM command
TA1, beginning offset = 6
TA2, address = 0000h
Read entire memory
Reset pulse
Presence pulse, done
Presence pulse
Presence pulse
Read scratchpad data and verify
Presence pulse
TA1
Presence pulse
Issue read memory command