參數(shù)資料
型號(hào)： MAX3000
廠商： Maxim Integrated Products, Inc.
英文描述： CLAMP
中文描述： 1.2V至5.5V的，【15kV ESD保護(hù)，0.1レ甲，35Mbps，8通道電平轉(zhuǎn)換器
文件頁(yè)數(shù)： 15/24頁(yè)
文件大?。?/td> 422K
代理商： MAX3000
M
+1.2V to +5.5V, ±15kV ESD-Protected, 0.1μA,
35Mbps, 8-Channel Level Translators
______________________________________________________________________________________
15
Detailed Description
The MAX3000E/MAX3001E/MAX3002
–
MAX3012 logic-
level translators provide the level shifting necessary to
allow data transfer in a multivoltage system. Externally
applied voltages, V
CC
and V
L
, set the logic levels on
either side of the device. Logic signals present on the
V
L
side of the device appear as a higher voltage logic
signal on the V
CC
side of the device, and vice-versa.
The MAX3000E/MAX3001E/MAX3002/MAX3003 are
bidirectional level translators allowing data translation
in either direction (V
L
V
CC
) on any single data line.
The MAX3004
–
MAX3012 unidirectional level translators
level shift data in one direction (V
L
→
V
CC
or V
CC
→
V
L
) on any single data line. The MAX3000E/MAX3001E/
MAX3002
–
MAX3012 accept V
L
from +1.2V to +5.5V. All
devices have V
CC
ranging from +1.65V to +5.5V, mak-
ing them ideal for data transfer between low-voltage
ASICs/PLDs and higher voltage systems.
The MAX3000E/MAX3001E/MAX3002/MAX3004
–
MAX3012 feature an output enable mode that reduces
V
CC
supply current to less than 2μA, and V
L
supply
current to less than 2μA when in shutdown. The
MAX3000E/MAX3001E have ±15kV ESD protection on
the V
CC
side for greater protection in applications that
route signals externally. The MAX3000E operates at a
guaranteed data rate of 230kbps; the MAX3001E oper-
ates at a guaranteed data rate of 4Mbps and the
MAX3002
–
MAX3012 are guaranteed with a data rate of
20Mbps of operation over the entire specified operating
voltage range.
Level Translation
For proper operation, ensure that +1.65V
≤
V
CC
≤
+5.5V,
+1.2V
≤
V
L
≤
+5.5V, and V
L
≤
V
CC
. During power-up
sequencing, V
L
≥
V
CC
does not damage the device.
During power-supply sequencing, when V
CC
is floating
and V
L
is powering up, up to 10mA current can be
sourced to each load on the V
L
side, yet the device does
not latch up.
The maximum data rate also depends heavily on the
load capacitance (see the
Typical Operating
Characteristics
), output impedance of the driver, and
the operational voltage range (see the
Timing
Characteristics
).
Input Driver Requirements
The MAX3001E/MAX3002
–
MAX3012 architecture is
based on a one-shot accelerator output stage. See
Figure
5. Accelerator output stages are always in three-
state except when there is a transition on any of the
translators on the input side, either I/O V
L
or I/O V
CC
.
Then, a short pulse is generated during which the accel-
erator output stages become active and charge/dis-
charge the capacitances at the I/Os. Due to its
bidirectional nature, both input stages become active
during the one-shot pulse. This can lead to some current
feeding into the external source that is driving the trans-
lator. However, this behavior helps to speed up the tran-
sition on the driven side.
For proper operation, the driver has to meet the follow-
ing conditions: 50
maximum output impedance and
20mA minimum output current (for 20Mbps versions),
400
maximum output impedance and 4mA minimum
output current (for 4Mbps versions), 1k
maximum out-
put impedance and 1mA minimum output current (for
230kbps versions). Figure 6 shows a typical input cur-
rent vs. input voltage.
Enable Output Mode (EN, EN A/B)
The MAX3000E/MAX3001E/MAX3002 and the MAX3004
–
MAX3012 feature an EN input, and the MAX3003 has an
EN A/B input. Pull EN low to set the MAX3000E/
MAX3001E/MAX3002/MAX3004
–
MAX3012s
’
I/O V
CC
1
through I/O V
CC
8 in three-state output mode, while I/O
V
L
1 through I/O V
L
8 have internal 6k
pulldown resis-
tors. Drive EN to logic high (V
L
) for normal operation. For
the MAX3003, pull EN A/B low to place channels 1B
through 4B in active mode, while channels 1A through
4A are in three-state mode. Drive EN A/B to logic high
(V
L
) to enable channels 1A through 4A, while channels
1B through 4B remain in three-state mode.
±15kV ESD Protection
As with all Maxim devices, ESD-protection structures
are incorporated on all pins to protect against electro-
static discharges encountered during handling and
assembly. The I/O V
CC
lines have extra protection
against static discharge. Maxim
’
s engineers have
developed state-of-the-art structures to protect these
pins against ESD of ±15kV without damage. The ESD
structures withstand high ESD in all states: normal
operation, three-state output mode, and powered
down. After an ESD event, Maxim
’
s E versions keep
working without latchup, whereas competing products
can latch and must be powered down to remove
latchup.
ESD protection can be tested in various ways. The
I/O V
CC
lines of the MAX3000E/MAX3001E are char-
acterized for protection to ±15kV using the Human
Body Model.
相關(guān)PDF資料
PDF描述
MAX3000EEUP +1.2V to +5.5V, 【15kV ESD-Protected, 0.1レA, 35Mbps, 8-Channel Level Translators
MAX3007EUP Fixed-Point Digital Signal Processor 532-FCBGA
MAX3001E +1.2V to +5.5V, 【15kV ESD-Protected, 0.1UA, 35Mbps, 8-Channel Level Translators
MAX3002 +1.2V to +5.5V, 【15kV ESD-Protected, 0.1UA, 35Mbps, 8-Channel Level Translators
MAX3002EBP-T +1.2V to +5.5V, 【15kV ESD-Protected, 0.1UA, 35Mbps, 8-Channel Level Translators
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