IDT74LVCHR16543A
3.3V CMOS 16-BIT REGISTERED TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
3.3V CMOS 16-BIT
IDT74LVCHR16543A
REGISTERED TRANSCEIVER
WITH 3-STATE OUTPUTS,
5 VOLT TOLERANT I/O, BUS-HOLD
• Typical t
SK(o)
(Output Skew) < 250ps
• ESD > 2000V per MIL-STD-883, Method 3015; > 200V using
machine model (C = 200pF, R = 0)
• V
CC
= 3.3V ± 0.3V, Normal Range
• V
CC
= 2.7V to 3.6V, Extended Range
• CMOS power levels (0.4µ W typ. static)
µ
• All inputs, outputs, and I/O are 5V tolerant
• Supports hot insertion
• Available in SSOP, TSSOP, and TVSOP packages
FEATURES:
DRIVE FEATURES:
• Balanced Output Drivers: ±12mA
• Low switching noise
APPLICATIONS:
• 5V and 3.3V mixed voltage systems
• Data communication and telecommunication systems
The LVCHR16543A 16-bit registered transceiver is built using advanced
dual metal CMOS technology. The LVCHR16543A device can be used as
two independent 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) must be low in order to enter
data from A or to output data from B. If
CEAB
is low and
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. With
CEAB
and
OEAB
both low, the
3-state B outputs are active and reflect the data present at the output of the
A latches. Data flow from B to A is similar, but requires using the
CEBA, LEBA,
and
OEBA
inputs. To ensure the high-impedance state during power up or
power down,
OE
should be tied to Vcc through a pullup resistor; the minmum
value of the resistor is determined by the current sinking capability of the
driver.
The LVCHR16543A has series resistors in the device output structure
which will significantly reduce line noise when used with light loads. The
driver has been designed to drive ±12mA at the designated threshold levels.
Inputs 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 LVCHR16543A has “bus-hold” which retains the input’s last state
whenever the input goes to a high impedance. This prevents floating inputs
and eliminates the need for pull-up/down resistors.
DESCRIPTION:
FUNCTIONAL BLOCK DIAGRAM
1
OEBA
1
CEBA
54
1
LEBA
1
OEAB
1
CEAB
1
LEAB
55
1
3
2
56
2
OEBA
29
2
CEBA
31
2
LEBA
2
OEAB
2
CEAB
2
LEAB
30
28
26
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
© 1999 Integrated Device Technology, Inc.
OCTOBER 1999
DSC-4680/1
IDT74LVCHR16543A
3.3V CMOS 16-BIT REGISTERED TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
Description
Max
V
TERM
Terminal Voltage with Respect to GND
Storage Temperature
DC Output Current
Continuous Clamp Current,
V
I
< 0 or V
O
< 0
Continuous Current through each
V
CC
or GND
–0.5 to +6.5
–65 to +150
–50 to +50
–50
±100
T
STG
Unit
V
°C
mA
mA
mA
1
OEAB
1
LEAB
1
CEAB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
1
OEBA
1
LEBA
1
CEBA
I
OUT
I
IK
I
OK
I
CC
I
SS
GND
1
A
1
1
A
2
GND
1
B
1
1
B
2
V
CC
1
A
3
1
A
4
1
A
5
V
CC
1
B
3
1
B
4
1
B
5
NOTE:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause
permanent damage to the device. This is a stress rating only and functional operation
of the device at these or any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect reliability.
CAPACITANCE
(T
A
= +25°C, F = 1.0MHz)
Symbol
C
IN
C
OUT
C
I/O
Parameter
(1)
Input Capacitance
Output Capacitance
I/O Port Capacitance
Conditions
V
IN
= 0V
V
OUT
= 0V
V
IN
= 0V
Typ.
4.5
6.5
6.5
Max.
6
8
8
Unit
pF
pF
pF
GND
1
A
6
1
A
7
1
A
8
2
A
1
2
A
2
2
A
3
GND
1
B
6
1
B
7
1
B
8
2
B
1
2
B
2
2
B
3
NOTE:
1. As applicable to the device type.
PIN DESCRIPTION
Pin Names
xOEAB
xOEBA
xCEAB
xCEBA
xLEAB
xLEBA
xAx
xBx
Description
A-to-B Output Enable Input (Active LOW)
B-to-A Output Enable Input (Active LOW)
A-to-B Enable Input (Active LOW)
B-to-A Enable Input (Active LOW)
A-to-B Latch Enable Input (Active LOW)
B-to-A Latch Enable Input (Active LOW)
A-to-B Data Inputs or B-to-A 3-State Outputs
(1)
B-to-A Data Inputs or A-to-B 3-State Outputs
(1)
GND
2
A
4
2
A
5
2
A
6
GND
2
B
4
2
B
5
2
B
6
V
CC
2
A
7
2
A
8
V
CC
2
B
7
2
B
8
NOTE:
1. These pins have "Bus-Hold". All other pins are standard inputs, outputs, or I/Os.
FUNCTION TABLE
(EACH 8-BIT SECTION)
(1,2)
Inputs
xCEAB
H
X
L
L
L
xLEAB
X
X
H
L
L
xOEAB
X
H
L
L
L
xAx
X
X
X
L
H
Output Buffers
xBx
Z
Z
B
(3)
L
H
GND
2
CEAB
2
LEAB
2
OEAB
GND
2
CEBA
2
LEBA
2
OEBA
SSOP/ TSSOP/ TVSOP
TOP VIEW
NOTES:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Z = High-Impedance
2. A-to-B data flow is shown. B-to-A data flow is similar but uses
CEBA, LEBA,
and
OEBA.
3. Before
LEAB
LOW-to-HIGH transition.
2
IDT74LVCHR16543A
3.3V CMOS 16-BIT REGISTERED TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Operating Condition: T
A
= –40°C to +85°C
Symbol
V
IH
V
IL
I
IH
I
IL
I
OZH
I
OZL
I
OFF
V
IK
V
H
I
CCL
I
CCH
I
CCZ
∆I
CC
High Impedance Output Current
(3-State Output pins)
Input/Output Power Off Leakage
Clamp Diode Voltage
Input Hysteresis
Quiescent Power Supply Current
V
CC
= 0V, V
IN
or V
O
≤
5.5V
V
CC
= 2.3V, I
IN
= –18mA
V
CC
= 3.3V
V
CC
= 3.6V
V
IN
= GND or V
CC
—
—
—
—
—
—
—
–0.7
100
—
—
—
±50
–1.2
—
10
10
500
µA
V
mV
µA
V
CC
= 3.6V
V
O
= 0 to 5.5V
—
—
±10
µA
Parameter
Input HIGH Voltage Level
Input LOW Voltage Level
Input Leakage Current
V
CC
= 2.3V to 2.7V
V
CC
= 2.7V to 3.6V
V
CC
= 2.3V to 2.7V
V
CC
= 2.7V to 3.6V
V
CC
= 3.6V
V
I
= 0 to 5.5V
Test Conditions
Min.
1.7
2
—
—
—
Typ.
(1)
—
—
—
—
—
Max.
—
—
0.7
0.8
±5
µA
V
Unit
V
Quiescent Power Supply Current
Variation
3.6
≤
V
IN
≤
5.5V
(2)
One input at V
CC
- 0.6V, other inputs at V
CC
or GND
µA
NOTES:
1. Typical values are at V
CC
= 3.3V, +25°C ambient.
2. This applies in the disabled state only.
BUS-HOLD CHARACTERISTICS
Symbol
I
BHH
I
BHL
I
BHH
I
BHL
I
BHHO
I
BHLO
NOTES:
1. Pins with Bus-Hold are identified in the pin description.
2. Typical values are at V
CC
= 3.3V, +25°C ambient.
Parameter
(1)
Bus-Hold Input Sustain Current
Bus-Hold Input Sustain Current
Bus-Hold Input Overdrive Current
V
CC
= 3V
V
CC
= 2.3V
V
CC
= 3.6V
Test Conditions
V
I
= 2V
V
I
= 0.8V
V
I
= 1.7V
V
I
= 0.7V
V
I
= 0 to 3.6V
Min.
– 75
75
—
—
—
Typ.
(2)
—
—
—
—
—
Max.
—
—
—
—
±500
Unit
µA
µA
µA
3
IDT74LVCHR16543A
3.3V CMOS 16-BIT REGISTERED TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
OUTPUT DRIVE CHARACTERISTICS
Symbol
V
OH
Parameter
Output HIGH Voltage
V
CC
= 2.3V
V
CC
= 2.7V
V
CC
= 3V
V
OL
Output LOW Voltage
V
CC
= 2.3V to 3.6V
V
CC
= 2.3V
V
CC
= 2.7V
V
CC
= 3V
Test Conditions
(1)
V
CC
= 2.3V to 3.6V
I
OH
= – 0.1mA
I
OH
= – 4mA
I
OH
= – 6mA
I
OH
= – 4mA
I
OH
= – 8mA
I
OH
= – 6mA
I
OH
= – 12mA
I
OL
= 0.1mA
I
OL
= 4mA
I
OL
= 6mA
I
OL
= 4mA
I
OL
= 8mA
I
OL
= 6mA
I
OL
= 12mA
Min.
V
CC
– 0.2
1.9
1.7
2.2
2
2.4
2
—
—
—
—
—
—
—
Max.
—
—
—
—
—
—
—
0.2
0.4
0.55
0.4
0.6
0.55
0.8
V
Unit
V
NOTE:
1. V
IH
and V
IL
must be within the min. or max. range shown in the DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE table for the appropriate V
CC
range.
T
A
= – 40°C to + 85°C.
OPERATING CHARACTERISTICS, V
CC
= 3.3V ± 0.3V, T
A
= 25°C
Symbol
C
PD
C
PD
Parameter
Power Dissipation Capacitance per Transceiver Outputs enabled
Power Dissipation Capacitance per Transceiver Outputs disabled
Test Conditions
C
L
= 0pF, f = 10Mhz
Typical
Unit
pF
4
IDT74LVCHR16543A
3.3V CMOS 16-BIT REGISTERED TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
SWITCHING CHARACTERISTICS
(1)
V
CC
= 2.7V
Symbol
t
PLH
t
PHL
t
PLH
t
PHL
t
PZH
t
PZL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
PHZ
t
PLZ
t
SU
t
SU
t
H
t
H
t
W
t
SK
(o)
Parameter
Propagation Delay
xAx to xBx or xBx to xAx
Propagation Delay
xLEBA to xAx, xLEAB to xBx
Output Enable Time
xCEBA or xCEAB to xAx or xBx
Output Enable Time
xOEBA or xOEAB to xAx or xBx
Output Disable Time
xCEBA or xCEAB to xAx or xBx
Output Disable Time
xOEBA or xOEAB to xAx or xBx
Set-up Time, data before
CE↑
Set-up Time, data before
LE↑, CE
LOW
Hold Time, data after
CE↑
Hold Time, data after
LE↑, CE
LOW
Pulse Duration, xLEBA or xLEAB, xCEBA or xCEAB LOW
Output Skew
(2)
2
2
2
2
5
—
—
—
—
—
2
2
2
2
5
—
—
—
—
—
500
ns
ns
ns
ns
ns
ps
1.5
7.5
1.5
6.5
ns
1.5
7.5
1.5
6.5
ns
1.5
9
1.5
8
ns
1.5
9
1.5
8
ns
1.5
8
1.5
7
ns
Min.
1.5
Max.
7
V
CC
= 3.3V ± 0.3V
Min.
1.5
Max.
6
Unit
ns
—
—
—
NOTES:
1. See TEST CIRCUITS AND WAVEFORMS. T
A
= – 40°C to + 85°C.
2. Skew between any two outputs of the same package and switching in the same direction.
5
微控制器 MCU
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
