DS1859E-020/T&R Maxim Integrated Products, DS1859E-020/T&R Datasheet - Page 12

• Manufacturer Part Number: DS1859E-020/T&R
• Description: Digital Potentiometer ICs
• Manufacturer: Maxim Integrated Products

Specifications of DS1859E-020/T&R

• Number Of Pots: Dual
• Taps Per Pot: 256
• Resistance: 20 KOhms
• Wiper Memory: Non Volatile
• Digital Interface: Serial (2-Wire)
• Operating Supply Voltage: 3.3 V, 5 V
• Supply Current: 2 mA
• Maximum Operating Temperature: + 95 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.85 V
• Package / Case: TSSOP-16
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

above is accessible only through the Main Device
address. This memory is organized as three tables. The
desired table can be selected by the contents of mem-
ory location 7Fh, Main Device. The Auxiliary Device
address has no access to the tables, but the Auxiliary
Device address can be mapped into the Main Device’s
memory space as a fourth table. Device addresses are
programmable with two control bits in EEPROM.
Dual, Temperature-Controlled Resistors with
Internally Calibrated Monitors
Figure 3. Memory Organization, ADEN = 1
Table 6. Main Device
Table 7. Auxiliary Device
12
WPEN
APEN
0
X
1
0
1
____________________________________________________________________
WPEN
X
X
MPEN
MAIN DEVICE ENABLE
X
0
1
PROTECT AUXILIARY
DEC
127
128
143
199
255
95
96
0
PROTECT MAIN
Yes
EN
80h
No
MEMORY PARTITION WITH ADEN BIT = 1
AUXILIARY
TABLE 00
DEVICE
TABLE SELECT
Yes
No
No
FFh
60h
0
DEVICE
MAIN
DECODER
5Fh
7Fh
EN
EN
80h
ADEN configures memory access to respond to differ-
ent device addresses (see Tables 4 and 5).
The default device address for EEPROM-generated
addresses is A2h.
If the ADEN bit is 1, additional 128 bytes of EEPROM
are accessible through the Main Device, selected as
Table 00 (see Figure 3). In this configuration, the
Auxiliary Device is not accessible. APEN controls the
protection of Table 00 regardless of ADEN’s setting.
ADFIX (address fixed) determines whether the Main
Device address is determined by an EEPROM byte
(Table 01, byte 8Ch, when ADFIX = 1). There can be
up to 128 devices sharing a common 2-wire bus, with
each device having its own unique device address.
TABLE CONTROL
MON LOOK-UP
SEL
EN
TABLE 01
8Fh
80h
F0h
R0 LOOK-UP
RESERVED
TABLE
SEL
EN
TABLE 02
C7h
FFh
80h
F0h
R1 LOOK-UP
RESERVED
TABLE
SEL
EN
TABLE 03
C7h
FFh