MAX1989MUE Maxim Integrated Products, MAX1989MUE Datasheet - Page 12

• Manufacturer Part Number: MAX1989MUE
• Description: Board Mount Temperature Sensors
• Manufacturer: Maxim Integrated Products

Specifications of MAX1989MUE

• Full Temp Accuracy: +/- 3.5 C, +/- 5 C
• Package / Case: TSSOP-16
• Digital Output - Bus Interface: Serial (2-Wire)
• Digital Output - Number Of Bits: 7 bit + Sign
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• Output Type: Digital
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

level sensitive). Successful reading of the alert
response address clears the interrupt latch.
The 8-bit command byte register (Table 4) is the master
index that points to the various other registers within the
MAX1668/MAX1805/MAX1989. The register’s POR
Multichannel Remote/Local
Temperature Sensors
Table 4. Command Byte Bit Assignments for MAX1668/MAX1805/MAX1989
12
*If the device is in hardware standby mode at POR, all temperature registers read 0°C.
**Not available for MAX1805.
______________________________________________________________________________________
REGISTER
REHL3**
REHL4**
WELL3**
WELL4**
RELL3**
RELL4**
WEHI3**
WEHI4**
MFG ID
RET3**
RET4**
WELL1
WELL2
DEV ID
REHL1
REHL2
WEHI1
WEHI2
RELL1
RELL2
WIHL
RET1
RET2
WILL
RIHL
RILL
RS1
RS2
WC
RIT
RC
Command Byte Functions
COMMAND
0Ah
0Bh
0Ch
0Dh
1Ah
1Bh
1Ch
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
0Eh
0Fh
10h
11h
12h
13h
14h
15h
16h
17h
18h
19h
FEh
FFh
0000 0011 (0000 0101)
POR STATE
(0110 1110)
[0000 1011]
0000 0000*
0000 0000*
0000 0000*
0000 0000*
0000 0000*
0000 0000
0000 0000
0000 0000
0111 1111
1100 1001
0111 1111
1100 1001
0111 1111
1100 1001
0111 1111
1100 1001
0111 1111
1100 1001
0100 1101
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
state is 0000 0000, so that a receive byte transmission
(a protocol that lacks the command byte) that occurs
immediately after POR returns the current local temper-
ature data.
Read local temperature
Read remote DX1 temperature
Read remote DX2 temperature
Read remote DX3 temperature
Read remote DX4 temperature
Read status byte 1
Read status byte 2
Read Configuration Byte
Read local T
Read local T
Read remote DX1 T
Read remote DX1 T
Read remote DX2 T
Read remote DX2 T
Read remote DX3 T
Read remote DX3 T
Read remote DX4 T
Read remote DX4 T
Write configuration byte
Write local T
Write local T
Write remote DX1 T
Write remote DX1 T
Write remote DX2 T
Write remote DX2 T
Write remote DX3 T
Write remote DX3 T
Write remote DX4 T
Write remote DX4 T
Read manufacture ID
Read device ID (for MAX1805) [for MAX1989]
HIGH
LOW
HIGH
LOW
limit
limit
limit
limit
FUNCTION
HIGH
LOW
HIGH
LOW
HIGH
LOW
HIGH
LOW
HIGH
LOW
HIGH
LOW
HIGH
LOW
HIGH
LOW
limit
limit
limit
limit
limit
limit
limit
limit
limit
limit
limit
limit
limit (MAX1989)
limit
limit
limit