71M6515H
A Maxim Integrated Products Brand
Energy Meter IC
DATA SHEET
JULY 2011
Pin
No.
Name
Type
Circuit Description
Enables the UART when 0. The UART is disabled when this pin is set
to 1. A positive pulse on this pin will reset the UART. This pin must be
terminated to ground.
UARTCSZ
34
I
3
High-Speed Synchronous Interface (SSI).
SRDY
SFR
SSCLK
SSDATA
24
9
5
I
3
4
4
4
The SRDY input should be tied to ground.
SSI frame pulse output, one SSCLK wide.
SSI clock output (5MHz or 10MHz selectable).
SSI data output, changes on the rising edge of SSCLK.
UART serial Interface receiver input. The voltage at this pin must not
exceed 3.6V. This pin must be terminated to V3P3D or ground.
UART serial Interface transmitter output.
Digital output test multiplexer. Controlled by TMUX[2:0].
Selectable pulse output (default: VARh pulse).
O
O
O
8
RX
44
I
3
TX
4
3
36
35
O
O
O
O
4
4
4
4
TMUXOUT
PULSER
PULSEW
Selectable pulse output (default: Wh pulse).
Power/Ground Pin Description
Name
Pin No. Type
Description
GNDA
49,60
P
P
Analog ground: This pin should be connected directly to the ground plane.
Digital ground: These pins must be connected directly to the ground plane.
1,27,
48,62
GNDD
V3P3A
V3P3D
50
7
P
P
Analog power: A 3.3V analog power supply should be connected to this pin.
Digital power supply: A 3.3V digital power supply should be connected to this pin.
Battery backup power supply. A battery or super-capacitor is to be connected between
VBAT and GNDD. If no battery is used, connect VBAT to V3P3D.
VBAT
V2P5
45
46
P
O
Output of the 2.5V regulator. A 0.1µF capacitor should be connected from this pin to GND.
Pin types: P = Power, O = Output, I = Input, I/O = Input/Output
The circuit number denotes the equivalent circuit, as specified under “I/O Equivalent Circuits”.
Reserved Pins
Pins labeled RESERVED are not to be connected.
Name
Pin No.
2,10,11,12,
Description
13,17,18,19,
20,26,28,29,
30,31,32,43,
64
RESERVED
DO NOT CONNECT THESE PINS!
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