DS1847

2 of 17

PIN DESCRIPTIONS

Name TSSOP BGA

Description

14

A3

Power Supply Terminal. The DS1847 will support supply

voltages ranging from +3.0V to +5.5V.

GND

7

D1

Ground Terminal.

SDA

1

B2

2-Wire Serial Data Interface. The serial data pin is for serial data

transfer to and from the DS1847. The pin is open drain and may

be wire-ORed with other open drain or open collector interfaces.

SCL

2

A2

2-Wire Serial Clock Input. The serial clock input is used to

clock data into the DS1847 on rising edges and clock data out on

falling edges.

WP

6

C1

Write Protect Input. If open or set to logic 1, all memory, control

registers, and Look-up tables are write protected. If set to a logic 0, the

device is not write protected and can be written to. The WP pin is pulled

high internally.

A0

3

A1

Address Input. Pins A0, A1, and A2 are used to specify the

address of each DS1847 when used in a multi-dropped

configuration.

A1

4

B1

Address Input.

A2

5

C2

Address Input.

H0

13

A4

High terminal of Resistor 0. For both resistors, it is

not required that the high terminal be connected to a potential

greater than the low terminal. Voltage applied to the high terminal

H1

11

B3

High terminal of Resistor 1.

L0

8

D3

Low terminal of Resistor 0. For both resistors, it is

not required that the low terminal be connected to a potential less

than the high terminal. Voltage applied to the low terminal of each

L1

10

C4

Low terminal of Resistor 1.

NC

9

D4

No Connect.

NC

12

B4

No Connect.

NC

C3

No Connect.

NC

D2

No Connect.