DS2431/T&R Maxim Integrated, DS2431/T&R Datasheet - Page 14

• Manufacturer Part Number: DS2431/T&R
• Description: EEPROM
• Manufacturer: Maxim Integrated

Specifications of DS2431/T&R

• Memory Size: 1 Kbit
• Organization: 4 Pages x 256
• Data Retention: 40 Years
• Operating Supply Voltage: 3.3 V, 5 V
• Maximum Operating Temperature: + 85 C
• Package / Case: TO-92
• Interface Type: 1-Wire Serial
• Minimum Operating Temperature: - 40 C
• Supply Voltage - Max: 5.25 V
• Supply Voltage - Min: 2.8 V

1024-Bit, 1-Wire EEPROM
DS2431
Figure 9a. ROM Functions Flowchart
14
FUNCTION COMMAND
BUS MASTER Tx ROM
SERIAL NUMBER
FAMILY CODE
COMMAND?
READ ROM
DS2431 Tx
DS2431 Tx
DS2431 Tx
CRC BYTE
(6 BYTES)
(1 BYTE)
RC = 0
33h
Y
FROM MEMORY FUNCTIONS
FLOWCHART (FIGURE 7)
N
MASTER Tx BIT 63
MASTER Tx BIT 0
MASTER Tx BIT 1
BIT 63 MATCH?
BIT 0 MATCH?
BIT 1 MATCH?
MATCH ROM
COMMAND?
RC = 0
RC = 1
55h
Y
Y
Y
Y
TO MEMORY FUNCTIONS
FLOWCHART (FIGURE 7)
PRESENCE PULSE
BUS MASTER Tx
RESET PULSE?
RESET PULSE
N
N
N
DS2431 Tx
N
Y
OD
N
N
N
MASTER Tx BIT 63
DS2431 Tx BIT 63
DS2431 Tx BIT 63
MASTER Tx BIT 0
MASTER Tx BIT 1
DS2431 Tx BIT 0
DS2431 Tx BIT 0
DS2431 Tx BIT 1
DS2431 Tx BIT 1
BIT 63 MATCH?
BIT 0 MATCH?
BIT 1 MATCH?
SEARCH ROM
COMMAND?
RC = 0
RC = 1
N
F0h
Y
Y
Y
Y
OD = 0
N
COMMAND?
SKIP ROM
RC = 0
CCh
Y
FROM FIGURE 9b
FROM FIGURE 9b
N
TO FIGURE 9b
TO FIGURE 9b
Maxim Integrated