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參數(shù)資料
| 型號： | A1193LUA-T |
| 廠商： | Allegro Microsystems Inc |
| 文件頁數(shù)： | 9/18頁 |
| 文件大小： | 383K |
| 描述： | IC SW HALL EFFECT CHOPPER 3SIP |
| 特色產(chǎn)品： | A119x Switches |
| 標(biāo)準(zhǔn)包裝： | 4,000 |
| 類型： | 單極開關(guān) |
| 電源電壓： | 3 V ~ 24 V |
| 電流 - 電源： | 6.9mA |
| 輸出類型： | 數(shù)字 |
| 特點(diǎn)： | 可編程 |
| 工作溫度： | -40°C ~ 150°C |
| 封裝/外殼： | 3-SSIP |
| 供應(yīng)商設(shè)備封裝： | 3-SIP |
| 包裝： | 散裝 |
| 其它名稱： | 620-1410 |
Programming Guidelines
Overview
Programming is accomplished by sending a series of input volt-
age pulses serially through the VCC (supply) pin of the device.
A unique combination of different voltage level pulses controls
the internal programming logic of the device to select a desired
programmable parameter and change its value. There are three
voltage levels that must be taken into account when program-
ming. These levels are referred to as high (V
PH
), mid (V
PM
), and
low (V
PL
) (see figure 1 and table 1).
The A119x family features two programmable modes, Try mode
and Blow mode.
" In Try mode, programmable parameter values are set and mea-
sured. A parameter value is stored temporarily, and reset after
cycling the supply voltage.
" In Blow mode, the value of a programmable parameter may
be permanently set by blowing solid-state fuses internal to the
device. Device locking is also accomplished in this mode.
The programming sequence is designed to help prevent the
device from being programmed accidentally; for example, as a
result of noise on the supply line. Although any programmable
variable power supply can be used to generate the pulse wave-
forms, Allegro highly recommends using the Allegro Sensor IC
Evaluation Kit, available on the Allegro website On-line Store.
The manual for that kit is available for download free of charge,
and provides additional information on programming these
devices.
Definition of Terms
Register. The section of the programming logic that controls the
choice of programmable modes and parameters.
Bit Field. The internal fuses unique to each register, represented
as a binary number. Changing the bit field selection in a particu-
lar register causes its programmable parameter to change, based
on the internal programming logic.
Key. A series of V
PM
voltage pulses used to select a register or mode.
Table 1. Programming Pulse Requirements, Protocol at T
A
= 25癈 (refer also to figure 4)
Characteristic Symbol
Notes
Min. Typ. Max. Unit
Programming Voltage
V
PL
Measured at the VCC pin.
4.5 5 5.5 V
V
PM
12.5 14 V
V
PH
21 27 V
Programming Current I
PP
t
Pr
= 11 約, V
CC
= 5 ?26 V, C
BLOW
= 0.1 糉 (min). Minimum supply current
required to ensure proper fuse blowing. C
BLOW
must be connected between the
VCC and GND pins during programming to provide the current necessary for fuse
blowing.
175 mA
Pulse Width
t
LOW
Duration at V
PL
separating pulses at V
PM
or V
PH
.
20 約
t
ACTIVE
Duration of pulses at V
PM
or V
PH
for key/code selection.
20 約
t
BLOW
Duration of pulse at V
PH
for fuse blowing.
90 100 約
Pulse Rise Time
t
Pr
V
PL
to V
PM
, or V
PL
to V
PH
.
5 100 約
Pulse Fall Time
t
Pf
V
PH
to V
PL
, or V
PM
to V
PL
.
5 100 約
Blow Pulse Slew Rate SR
BLOW
375 mV/ 約
0
(Supply
cycled)
Programming
pulses
Blow
pulse
t
ACTIVE
t
LOW
t
LOW
t
BLOW
t
Pr
t
Pf
V
PH
V
PM
V
PL
Figure 4. Programming pulse definition (see table 1)
Programmable, Chopper-Stabilized,
Two Wire Hall-Effect Switches
A1190, A1192,
and A1193
9
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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