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參數(shù)資料
| 型號(hào)： | SMM764FR4 |
| 廠商： | Summit Microelectronics, Inc. |
| 英文描述： | Four-Channel Active DC Output Controller, Monitor, Marginer and Sequencer with Sequence-Link⑩ |
| 中文描述： | 四通道有源直流輸出控制器，監(jiān)視器，Marginer和音序器的序列連接⑩ |
| 文件頁數(shù)： | 6/33頁 |
| 文件大小： | 392K |
| 代理商： | SMM764FR4 |
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SMM764
Preliminary Information
Summit Microelectronics, Inc
2098 1.1 6/29/2005
6
Pin
Number
Pin
Type
Pin Name
Pin Description
13
I/O
SEQ_LINK
SEQ_LINK (Sequence-Link) is an open drain bi-directional pin. This pin
should be attached to other Sequence-Link devices, during linked operation.
SEQ_LINK must be pulled high through an external pull-up resistor when
multiple Sequence-Link devices are used. When the SMM764 is not used
with another Sequence-Link device, SEQ_LINK should be tied directly to
ground.
VREF (Voltage Reference) is a bi-directional analog pin. VREF is used for
Active DC Output Control and margining. VREF can be programmed to
output the internal 1.25V reference, or accept an external reference. VREF is
also used as a reference for the ADC.
FILT_CAP (Filter Capacitor) is an external capacitor input used to filter VM
X
inputs.
14
I/O
VREF
15
CAP
FILT_CAP
16,17,
18,20,
21,22,
23,25
41,36,
31,26
42,37,
32,27
43,38,
33,28
44,39,
34,29
NC
No Connect
Leave open, do not connect. These pins must be left floating.
IN
VM
X
VM
X
(Voltage Monitor) pins are analog inputs. These pins are normally
attached to the positive converter sense line, VM
A
through VM
D.
External capacitor input used to filter the VM
X
inputs to the 10-bit ADC, CAP
A
through CAP
D
. This provides an RC filter where R = 25k
..
PUP
X
(Power Up Permitted) pins are programmable active high/low open
drain converter enable output, PUP
A
through PUP
D.
Output voltage used to control the output of DC/DC converters, TRIM
A
through TRIM
D.
TRIM_CAP
X
is an analog output pin used to control the output of DC/DC
converters. If the ADOC/margining functionality is not used on a channel the
associated TRIM_CAP
X
pin should be
l
eft floating. There are 4 TRIM_CAP
X
pins, TRIM_CAP
A
through TRIM_CAP
D
.
CAP
CAP
X
OUT
PUP
X
OUT
TRIM
X
45,40,
35,30
CAP
TRIM_CAP
X
46
PWR
VDD
Power supply of the part
47
PWR
12VIN
12VIN (12 Volt Input) is a power supply input internally regulated to either
3.6V or 5.5V.
VDD_CAP ( VDD Capacitor) is an external capacitor input used to filter the
internal supply.
48
CAP
VDD_CAP
PIN DESCRIPTIONS (Cont.)
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