MAX3002E Maxim Integrated Products, MAX3002E Datasheet - Page 15

• Manufacturer Part Number: MAX3002E
• Description: +1.2V to +5.5V, ±15kV ESD-Protected, 0.1µA, 35Mbps, 8-Channel Level Translators
• Manufacturer: Maxim Integrated Products

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
either side of the device. Logic signals present on the
V
signal on the V
The MAX3000E/MAX3001E/MAX3002/MAX3003 are
bidirectional level translators allowing data translation
in either direction (V
The MAX3004–MAX3012 unidirectional level translators
level shift data in one direction (V
V
MAX3002–MAX3012 accept V
devices have V
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
current to less than 2µA when in shutdown. The
MAX3000E/MAX3001E have ±15kV ESD protection on
the V
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.
For proper operation, ensure that +1.65V ≤ V
+1.2V ≤ V
sequencing, V
During power-supply sequencing, when V
and V
sourced to each load on the V
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).
The MAX3001E/MAX3002–MAX3012 architecture is
based on a one-shot accelerator output stage. See
Figure
state except when there is a transition on any of the
translators on the input side, either I/O V
L
L
CC
) on any single data line. The MAX3000E/MAX3001E/
side of the device appear as a higher voltage logic
supply current to less than 2µA, and V
CC
L
5. Accelerator output stages are always in three-
+1.2V to +5.5V, ±15kV ESD-Protected, 0.1µA,
is powering up, up to 10mA current can be
side for greater protection in applications that
L
≤ +5.5V, and V
L
CC
CC
≥ V
______________________________________________________________________________________
ranging from +1.65V to +5.5V, mak-
side of the device, and vice-versa.
CC
L
CC
Input Driver Requirements
↔ V
Detailed Description
and V
does not damage the device.
35Mbps, 8-Channel Level Translators
CC
L
L
L
) on any single data line.
L
≤ V
, set the logic levels on
side, yet the device does
from +1.2V to +5.5V. All
Level Translation
CC
L
. During power-up
→ V
L
or I/O V
CC
CC
CC
or V
is floating
L
≤ +5.5V,
CC
supply
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: 50Ω maximum output impedance and
20mA minimum output current (for 20Mbps versions),
400Ω maximum output impedance and 4mA minimum
output current (for 4Mbps versions), 1kΩ maximum out-
put impedance and 1mA minimum output current (for
230kbps versions). Figure 6 shows a typical input cur-
rent vs. input voltage.
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
through I/O V
V
tors. Drive EN to logic high (V
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
1B through 4B remain in three-state mode.
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
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
acterized for protection to ±15kV using the Human
Body Model.
L
L
1 through I/O V
) to enable channels 1A through 4A, while channels
CC
lines of the MAX3000E/MAX3001E are char-
Enable Output Mode (EN, EN A/B)
CC
8 in three-state output mode, while I/O
L
8 have internal 6kΩ pulldown resis-
CC
lines have extra protection
±15kV ESD Protection
L
) for normal operation. For
CC
15
1