90E21 Datasheet, PDF (9/57 Pages) Integrated Device Technology – Single-Phase High-Performance Wide-Span Energy Metering IC

90E21/22/23/24
1
PIN ASSIGNMENT
SINGLE-PHASE HIGH-PERFORMANCE WIDE-SPAN ENERGY METERING IC
MMD1
DGND
DVDD
Reset
AVDD
AGND
I2P
I2N
NC
I1P
I1N
NC
Vref
AGND
1^{note 1}
2
3
4
5
6
7^{note 2}
8^{note 2}
9
10
11
12
13
14
28^{note 1}
27
26
25
24
23
22
21
20
19^{note 3}
18
17
16
15
MMD0
SDI
SDO
SCLK
CS
OSCO
OSCI
ZX
IRQ
CF2
CF1
WarnOut
VP
VN
Figure-5 Pin Assignment (Top View)
Note 1: Pin 1 and 28 are dedicated for the 90E23/24. Pin 1 should connect to DGND and pin 28 should connect to DVDD for 90E21/22.
Note 2: Pin 7 and 8 are dedicated for the 90E23/24. They should be left open for the 90E21/22.
Note 3: Pin 19 is dedicated for the 90E22/24. It should be left open for the 90E21/23.
Pin Assignment
9
January 10, 2012