IDT74ALVCH162245
3.3V CMOS 16-BIT BUS TRANSCEIVER W/3-STATE OUTPUTS
EXTENDED COMMERCIAL TEMPERATURE RANGE
3.3V CMOS 16-BIT BUS
TRANSCEIVER WITH
3-STATE OUTPUTS
AND BUS-HOLD
FEATURES:
0.5 MICRON CMOS Technology
Typical t
SK(0)
(Output Skew) < 250ps
ESD > 2000V per MIL-STD-883, Method 3015;
> 200V using machine model (C = 200pF, R = 0)
– 0.635mm pitch SSOP, 0.50mm pitch TSSOP,
and 0.40mm pitch TVSOP packages
– Extended commercial range of – 40°C to + 85°C
– 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)
– Rail-to-Rail output swing for increased noise margin
Drive Features for ALVCH162245:
– Balanced Output Drivers: ±12mA (A port)
– High Output Drivers: ±24mA (B port)
–
–
–
IDT74ALVCH162245
DESCRIPTION:
This 16-bit bus transceiver is built using advanced dual metal CMOS
technology. The ALVCH162245 is designed for asynchronous commu-
nication between data buses. The control-function implementation
minimizes external timing requirements.
This device can be used as two 8-bit transceivers or one 16-bit
transceiver. It allows data transmission from the A bus to the B bus or
from the B bus to the A bus, depending on the logic level at the direction-
control (DIR) input. The output-enable (OE) input can be used to disable
the device so that the buses are effectively isolated.
The ALVCH162245 has series resistors in the device out-put struc-
ture of the “A” port which will significantly reduce line noise when used with
light loads. This driver has been designed to drive ±12mA at the
designated threshold levels. The “B” port has a ±24mA driver.
The ALVCH162245 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.
APPLICATIONS:
•
3.3V High Speed Systems
•
3.3V and lower voltage computing systems
Functional Block Diagram
1
DIR
1
48
2
DIR
1
OE
24
25
36
13
35
14
33
16
32
17
30
19
29
20
27
22
2
OE
1
A
1
47
2
46
3
44
5
43
6
41
8
40
9
38
11
2
A
1
1
B
1
2
A
2
1
B
2
2
A
3
1
B
3
2
A
4
1
B
4
2
A
5
1
B
5
2
A
6
1
B
6
2
A
7
1
B
7
2
A
8
12
2
B
1
1
A
2
2
B
2
1
A
3
2
B
3
1
A
4
2
B
4
1
A
5
2
B
5
1
A
6
2
B
6
1
A
7
2
B
7
1
A
8
37
26
1
B
8
23
2
B
8
EXTENDED COMMERCIAL TEMPERATURE RANGE
1
c
1999 Integrated Device Technology, Inc.
APRIL 1999
DSC-4748/-
IDT74ALVCH162245
3.3V CMOS 16-BIT BUS TRANSCEIVER W/3-STATE OUTPUTS
EXTENDED COMMERCIAL TEMPERATURE RANGE
PIN CONFIGURATION
1
OE
ABSOLUTE MAXIMUM RATING
Symbol
V
TERM(2)
Description
Terminal Voltage
with Respect to GND
Terminal Voltage
with Respect to GND
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
(1)
Unit
V
V
°C
mA
mA
mA
mA
NEW16link
Max.
– 0.5 to + 4.6
– 0.5 to
V
CC
+ 0.5
– 65 to + 150
– 50 to + 50
± 50
– 50
±100
1
DIR
1
B
1
1
B
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
SO48-1 37
SO48-2
SO48-3 36
35
34
33
32
31
30
29
28
27
26
25
V
TERM(3)
1
A
1
1
A
2
T
STG
I
OUT
I
IK
I
OK
I
CC
I
SS
GND
1
B
3
1
B
4
GND
1
A
3
1
A
4
V
CC
1
B
5
1
B
6
V
CC
1
A
5
1
A
6
GND
1
B
7
1
B
8
2
B
1
2
B
2
GND
1
A
7
1
A
8
2
A
1
2
A
2
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
B
3
2
B
4
CAPACITANCE
(T
A
= +25
o
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
NEW16link
GND
2
A
3
2
A
4
V
CC
2
B
5
2
B
6
V
CC
2
A
5
2
A
6
NOTE:
1. As applicable to the device type.
GND
2
B
7
2
B
8
2
DIR
GND
2
A
7
2
A
8
2
OE
FUNCTION TABLE
Inputs
xOE
L
L
H
xDIR
L
H
X
(each 8-bit section)(1)
Outputs
SSOP/
TSSOP/TVSOP
TOP VIEW
B data to A bus
A data to B bus
Isolation
PIN DESCRIPTION
Pin Names
xOE
xDIR
xAx
xBx
(1)
(1)
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Description
Output Enable Inputs (Active LOW)
Direction Control Inputs
Side A Inputs or 3-State Outputs
Side B Inputs or 3-State Outputs
NOTE:
1. These pins have “Bus-Hold.” All other pins are standard inputs,
outputs, or I/Os.
c 1998 Integrated Device Technology, Inc.
2
DSC-123456
IDT74ALVCH162245
3.3V CMOS 16-BIT BUS TRANSCEIVER W/3-STATE OUTPUTS
EXTENDED COMMERCIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Operating Condition: TA = – 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
Quiescent Power Supply
Current Variation
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
Test Conditions
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
Min.
1.7
2
—
—
—
—
—
—
—
—
—
Typ.
(1)
—
—
—
—
—
—
—
—
– 0.7
100
0.1
Max.
—
—
0.7
0.8
±5
±5
± 10
± 10
– 1.2
—
40
µA
µA
V
mV
µA
µA
V
Unit
V
—
—
750
µA
NEW16link
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
NEW16link
Parameter
(1)
Bus-Hold Input Sustain Current
Bus-Hold Input Sustain Current
Bus-Hold Input Overdrive Current
V
CC
= 3.0V
V
CC
= 2.3V
V
CC
= 3.6V
Test Conditions
V
I
= 2.0V
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
NOTES:
1. Pins with Bus-hold are identified in the pin description.
2. Typical values are at V
CC
= 3.3V, +25°C ambient.
3
IDT74ALVCH162245
3.3V CMOS 16-BIT BUS TRANSCEIVER W/3-STATE OUTPUTS
EXTENDED COMMERCIAL TEMPERATURE RANGE
OUTPUT DRIVE CHARACTERISTICS (A PORT)
Symbol
V
OH
Parameter
Output HIGH Voltage
V
CC
Test Conditions
(1)
= 2.3V to 3.6V
I
OH
= – 0.1mA
I
OH
= – 4mA
I
OH
= – 6mA
V
CC
= 2.7V
V
CC
= 3.0V
V
OL
Output LOW Voltage
V
CC
= 2.3V to 3.6V
V
CC
= 2.3V
V
CC
= 2.7V
V
CC
= 3.0V
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
NEW16link
Unit
V
V
CC
= 2.3V
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.
OUTPUT DRIVE CHARACTERISTICS (B PORT)
Symbol
V
OH
Parameter
Output HIGH Voltage
V
CC
Test Conditions
(1)
= 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
I
OH
= – 24mA
I
OL
= 0.1mA
I
OL
= 6mA
I
OL
= 12mA
V
CC
= 2.7V
V
CC
= 3.0V
I
OL
= 12mA
I
OL
= 24mA
2
—
—
—
—
—
Max.
—
—
—
—
—
—
0.2
0.4
0.7
0.4
0.55
NEW16link
Unit
V
V
CC
= 2.3V
V
CC
= 2.3V
V
CC
= 2.7V
V
CC
= 3.0V
V
CC
= 3.0V
V
OL
Output LOW Voltage
V
CC
= 2.3V to 3.6V
V
CC
= 2.3V
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
o
C
V
CC
= 2.5V ± 0.2V
Symbol
Parameter
C
PD
Power Dissipation Capacitance
Outputs enabled
C
PD
Power Dissipation Capacitance
Outputs disabled
Test Conditions
C
L
= 0pF, f = 10Mhz
Typical
23
4
V
CC
= 3.3V ± 0.3V
Typical
30
5
Unit
pF
pF
4
IDT74ALVCH162245
3.3V CMOS 16-BIT BUS TRANSCEIVER W/3-STATE OUTPUTS
EXTENDED COMMERCIAL TEMPERATURE RANGE
SWITCHING CHARACTERISTICS (A PORT)(1)
V
CC
= 2.5V ± 0.2V
Symbol
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
SK
(o)
Parameter
Propagation Delay
xBx to xAx
Output Enable Time
xOE to xAx
Output Disable Time
xOE to xAx
Output Skew
(2)
Min.
1
1
1
—
Max.
4.9
6.8
6.3
—
V
CC
= 2.7V
Min.
—
—
—
—
Max.
4.7
6.7
5.7
—
V
CC
= 3.3V ± 0.3V
Min.
1
1
1
—
Max.
4.2
5.6
5.5
500
Unit
ns
ns
ns
ps
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.
SWITCHING CHARACTERISTICS (B PORT)(1)
V
CC
= 2.5V ± 0.2V
Symbol
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
SK
(o)
Parameter
Propagation Delay
xAx to xBx
Output Enable Time
xOE to xBx
Output Disable Time
xOE to xBx
Output Skew
(2)
Min.
1
1
1
—
Max.
3.7
5.7
5.2
—
V
CC
= 2.7V
Min.
—
—
—
—
Max.
3.6
5.4
4.6
—
V
CC
= 3.3V ± 0.3V
Min.
1
1
1
—
Max.
3
4.4
4.1
500
Unit
ns
ns
ns
ps
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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