IDT74ALVCH16543
3.3V CMOS 16-BIT REGISTERED TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
3.3V CMOS 16-BIT
REGISTERED TRANSCEIVER
WITH 3-STATE OUTPUTS AND
BUS-HOLD
• 0.5 MICRON CMOS Technology
• 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
• V
CC
= 2.5V ± 0.2V
• CMOS power levels (0.4µ W typ. static)
µ
• Rail-to-Rail output swing for increased noise margin
• Available in SSOP, TSSOP, and TVSOP packages
IDT74ALVCH16543
FEATURES:
DESCRIPTION:
DRIVE FEATURES:
• High Output Drivers: ±24mA
• Suitable for heavy loads
APPLICATIONS:
• 3.3V high speed systems
• 3.3V and lower voltage computing systems
This 16-bit registered transceiver is built using advanced dual metal CMOS
technology. The ALVCH16543 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 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
CEBA, LEBA,
and
OEBA.
The ALVCH16543 has been designed with a ±24mA output driver. This
driver is capable of driving a moderate to heavy load while maintaining speed
performance.
The ALVCH16543 has “bus-hold” which retains the inputs’ last state
whenever the input bus goes to a high impedance. This prevents floating inputs
and eliminates the need for pull-up/down resistors.
FUNCTIONAL BLOCK DIAGRAM
1
OEBA
1
CEBA
1
LEBA
1
OEAB
1
CEAB
1
LEAB
1
A
1
56
54
55
1
3
2
5
C1
1D
52
2
OEBA
2
CEBA
2
LEBA
2
OEAB
2
CEAB
2
LEAB
1
B
1
2
A
1
29
31
30
28
26
27
15
C1
1D
42
2
B
1
C1
1D
C1
1D
TO SEVEN OTHER CHANNELS
TO SEVEN OTHER CHANNELS
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
© 1999 Integrated Device Technology, Inc.
JULY 1999
DSC-4490/2
IDT74ALVCH16543
3.3V CMOS 16-BIT REGISTERED TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
1
OEAB
1
LEAB
1
CEAB
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
Description
Max
V
TERM
(2)
Terminal Voltage with Respect to GND
–0.5 to +4.6
–0.5 to V
CC
+0.5
–65 to +150
–50 to +50
±50
–50
±100
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
Unit
V
V
°C
mA
mA
mA
mA
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
V
TERM
(3)
Terminal Voltage with Respect to GND
T
STG
I
OUT
I
IK
I
OK
I
CC
I
SS
Storage Temperature
DC Output Current
Continuous Clamp Current,
V
I
< 0 or V
I
> V
CC
Continuous Clamp Current, V
O
< 0
Continuous Current through each
V
CC
or GND
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
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
NOTES:
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.
2. V
CC
terminals.
3. All terminals except V
CC
.
GND
2
A
4
2
A
5
2
A
6
GND
2
B
4
2
B
5
2
B
6
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.
5
7
7
Max.
7
9
9
Unit
pF
pF
pF
V
CC
2
A
7
2
A
8
V
CC
2
B
7
2
B
8
NOTE:
1. As applicable to the device type.
GND
2
CEAB
2
LEAB
2
OEAB
GND
2
CEBA
2
LEBA
2
OEBA
FUNCTION TABLE
(1,2)
Inputs
Output
xOEAB
X
H
L
L
L
xAx
X
X
X
L
H
xBx
Z
Z
B
(3)
L
H
xCEAB
X
X
L
L
L
xLEAB
X
X
H
L
L
SSOP/ TSSOP/ TVSOP
TOP VIEW
PIN DESCRIPTION
Pin Names
xOEAB
xOEBA
xCEAB
xCEBA
xLEAB
xLEBA
xAx
xBx
Description
A-to-B Output Enable Inputs (Active LOW)
B-to-A Output Enable Inputs (Active LOW)
A-to-B Enable Inputs (Active LOW)
B-to-A Enable Inputs (Active LOW)
A-to-B Latch Enable Inputs (Active LOW)
B-to-A Latch Enable Inputs (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)
NOTES:
1. A-to-B data flow is shown. B-to-A data flow is similar but uses xCEBA, xLEBA, and
xOEBA.
2. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Z = High-Impedance
3. Level of B before the indicated steady-state inputs were established.
NOTE:
1. These pins have "Bus-Hold". All other pins are standard inputs, outputs, or I/Os.
2
IDT74ALVCH16543
3.3V CMOS 16-BIT REGISTERED TRANSCEIVER
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
V
IK
V
H
I
CCL
I
CCH
I
CCZ
∆I
CC
Parameter
Input HIGH Voltage Level
Input LOW Voltage Level
Input HIGH Current
Input LOW Current
High Impedance Output Current
(3-State Output pins)
Clamp Diode Voltage
Input Hysteresis
Quiescent Power Supply Current
V
CC
= 2.3V, I
IN
= –18mA
V
CC
= 3.3V
V
CC
= 3.6V
V
IN
= GND or V
CC
One input at V
CC
- 0.6V, other inputs at V
CC
or GND
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
CC
= 3.6V
V
CC
= 3.6V
V
I
= V
CC
V
I
= GND
V
O
= V
CC
V
O
= GND
Test Conditions
Min.
1.7
2
—
—
—
—
—
—
—
—
—
Typ.
(1)
—
—
—
—
—
—
—
—
–0.7
100
0.1
Max.
—
—
0.7
0.8
±5
±5
±10
±10
–1.2
—
40
V
mV
µA
µA
µA
µA
V
Unit
V
Quiescent Power Supply Current
Variation
—
—
750
µA
NOTE:
1. Typical values are at V
CC
= 3.3V, +25°C ambient.
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
– 45
45
—
Typ.
(2)
—
—
—
—
—
Max.
—
—
—
—
±500
Unit
µA
µA
µA
3
IDT74ALVCH16543
3.3V CMOS 16-BIT REGISTERED TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
OUTPUT DRIVE CHARACTERISTICS
Symbol
V
OH
Parameter
Output HIGH Voltage
V
CC
= 2.3V
V
CC
= 2.3V
V
CC
= 2.7V
V
CC
= 3V
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
I
OH
= – 24mA
I
OL
= 0.1mA
I
OL
= 6mA
I
OL
= 12mA
I
OL
= 12mA
I
OL
= 24mA
Test Conditions
(1)
V
CC
= 2.3V to 3.6V
I
OH
= – 0.1mA
I
OH
= – 6mA
I
OH
= – 12mA
Min.
V
CC
– 0.2
2
1.7
2.2
2.4
2
—
—
—
—
—
Max.
—
—
—
—
—
—
0.2
0.4
0.7
0.4
0.55
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, T
A
= 25°C
V
CC
= 2.5V ± 0.2V
Symbol
C
PD
C
PD
Parameter
Power Dissipation Capacitance Outputs enabled
Power Dissipation Capacitance Outputs disabled
Test Conditions
C
L
= 0pF, f = 10Mhz
Typical
54
6
V
CC
= 3.3V ± 0.3V
Typical
64
7
Unit
pF
4
IDT74ALVCH16543
3.3V CMOS 16-BIT REGISTERED TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
SWITCHING CHARACTERISTICS
(1)
V
CC
= 2.5V ± 0.2V
Symbol
t
PLH
t
PHL
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
PZH
t
PZL
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
xLEAB to xBx or xLEAB to xAx
Output Enable Time
xCEAB to xBx or xCEAB to xAx
Output Disable Time
xCEAB to xBx or xCEAB to xAx
Output Enable Time
xOEAB to xBx or xOEAB to xAx
Output Disable Time
xOEAB to xBx or xOEAB to xAx
Set-up Time, data before
CE↑
Set-up Time, data before
LE↑, CE
LOW
Hold Time, Ax data after
CE↑
Hold Time, Bx data after
LE↑, CE
LOW
Pulse Duration,
LE
or
CE
LOW
Output Skew
(2)
1.2
1.2
1.2
1.2
3.3
—
—
—
—
—
—
—
1.5
1.5
0.8
0.8
3.3
—
—
—
—
—
—
—
1.2
1.2
1.3
1.3
3.3
—
—
—
—
—
—
500
ns
ns
ns
ns
ns
ps
1
5.7
—
4.8
1.1
4.6
ns
1
6.8
—
6.3
1
5.3
ns
1.3
6.1
—
6.2
1.5
5.1
ns
1
7.2
—
6.9
1
5.6
ns
1
6.5
—
6.2
1.1
5
ns
Min.
1
Max.
5.1
V
CC
= 2.7V
Min.
—
Max.
4.8
V
CC
= 3.3V ± 0.3V
Min.
1
Max.
4.3
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
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