IDT74LVCH16543A
3.3V CMOS 16-BIT REGISTERED TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
3.3V CMOS 16-BIT
IDT74LVCH16543A
REGISTERED TRANSCEIVER
WITH 3-STATE OUTPUTS,
5 VOLT TOLERANT I/O, BUS-HOLD
鈥?Typical t
SK(o)
(Output Skew) < 250ps
鈥?ESD > 2000V per MIL-STD-883, Method 3015; > 200V using
machine model (C = 200pF, R = 0)
鈥?V
CC
= 3.3V 鹵 0.3V, Normal Range
鈥?V
CC
= 2.7V to 3.6V, Extended Range
鈥?CMOS power levels (0.4碌 W typ. static)
碌
鈥?All inputs, outputs, and I/O are 5V tolerant
鈥?Supports hot insertion
鈥?Available in SSOP and TSSOP packages
FEATURES:
DESCRIPTION
DRIVE FEATURES:
APPLICATIONS:
鈥?High Output Drivers: 鹵24mA
鈥?Reduced system switching noise
鈥?5V and 3.3V mixed voltage systems
鈥?Data communication and telecommunication systems
The LVCH16543A 16-bit registered transceiver is built using advanced
dual metal CMOS technology. The LVCH16543A can be used as two 8-bit
transceivers or one 16-bit transceiver. Separate latch-enable (LEAB or
LEBA)
and output-enable (OEAB or
OEBA)
inputs are provided for each
register to permit independent control in either direction of data flow. The
A-to-B enable (CEAB) input must be low in order to enter data from the A
port or to output data from the B port.
LEAB
controls the latch function. When
LEAB
is low, the A to B latches are transparent. A subsequent low-to-high
transition of
LEAB
puts the A latches in the storage mode.
OEAB
performs
output enable function on the B port. Data flow from the B port to the A port
is similar but requires using
CEBA, LEBA,
and
OEBA
inputs. Flow-through
organization of signal pins simplifies layout. All inputs are designed with
hysteresis for improved noise margin.
All pins of this 16-bit registered transceiver can be driven from either 3.3V
or 5V devices. This feature allows the use of this device as a translator in
a mixed 3.3V/5V supply system.
The LVCH16543A has been designed with a
鹵
24mA output driver. This
driver is capable of driving a moderate to heavy load while maintaining
speed performance.
The LVCH16543A has 鈥渂us-hold鈥?which retains the inputs鈥?last state
whenever the input goes to a high impedance. This prevents floating inputs
and eliminates the need for pull-up/down resistors.
FUNCTIONAL BLOCK DIAGRAM
1
OEBA
56
2
OEBA
29
1
CEBA
54
1
LEBA
1
OEAB
1
CEAB
1
LEAB
55
1
3
2
2
CEBA
31
2
LEBA
2
OEAB
2
CEAB
30
28
26
2
LEAB
27
C1
1
A
1
5
2
A
1
15
C1
42
1D
C1
1D
52
1
B
1
1D
C1
1D
2
B
1
TO SEVEN OTHER CHANNELS
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
TO SEVEN OTHER CHANNELS
INDUSTRIAL TEMPERATURE RANGE
1
漏 2004 Integrated Device Technology, Inc.
JANUARY 2004
DSC-4612/3
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