SH3000UM SEMTECH [Semtech Corporation], SH3000UM Datasheet - Page 6

• Manufacturer Part Number: SH3000UM
• Manufacturer: SEMTECH [Semtech Corporation]

©2006 Semtech Corp.
POWER MANAGEMENT
Pin Confi guration
Pin Descriptions
Pin
T
1
2
3
4
5
6
7
8
VREG
VBAK
VDD
VSS
Pin Name
CLK
V
X
V
V
V
V
X
REG
BAK
OUT
1
2
3
4
DD
SS
SS
IN
SEL
MLP 16: 3x3 16 LEAD
16
5
TOP VIEW
15
6
Analog Out
Analog In
Digital In
T
Power
Power
Power
Power
Power
Type
14
7
13
8
12
11
10
9
Thermal pad - connect to ground
Ground, 0V - All V
Output of internal Voltage Regulator, 2.2V nominal. This pin can power exter-
nal loads of < 5mA. If load is “noisy” it requires a bypass capacitor. May be left
unconnected or used as a high logic level signal for CLK
Main power supply, +2.3 to +5.5V
Back-up power supply for real-time clock, +2.3 to +5.5V (+1.8 to +5.5V typical).
This voltage can be higher or lower than V
backup capacitor (with external recharge circuit). Connect to V
Oscillator pins for optional external low frequency crystal, typically 32.768kHz
crystal with nominal 12.5pF load cap. Keep open or connect to V
A logic low level selects the internal 32.768kHz RC oscillator (CLK
V
connected to V
RC oscillator. If CLK
crystal oscillator once it has stabilized, and RC oscillator is disabled for power
conservation. Do not connect CLK
must not be left open.
Ground, 0V. All V
SS
). A high state on this pin selects the 32.768kHz crystal oscillator (CLK
TEST VSS
RST
NRST
NRST
REG
Not authorized for release outside of Semtech
SS
). The SH3003 always starts up using the internal 32.768kHz
SS
pins and TEST (V
6
SEL
pins and TEST (V
Ordering Information
SH3003IMLTR
SH3003IMLTRT
EVK-SH3000USB
SH3000EK.pdf
SH3000UM.pdf
is high, the internal 32.768kHz clock switches to the
Device
Pin Function
SEL
to any signals except V
SS
SS
) pin must be connected together.
) pin must be connected together.
DD
. Connect a backup battery or
MLP 3x3mm, 16 pins
MLP 3x3mm, 16 pins, lead-free
SH3000 Evaluation Kit
SH3000 Evaluation Kit User Guide
SH3000 Reference Manual
SEL
Package
pin.
SS
DD
or V
SS
if not used.
SEL
www.semtech.com
SH3003
if not used.
REG
tied to
- DRAFT
. CLK
SEL
is
SEL