INDUSTRIAL TEMPERATURE RANGE
IDT74ALVCH162245
3.3V CMOS 16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS
1
APRIL 1999
INDUSTRIAL TEMPERATURE RANGE
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
1999 Integrated Device Technology, Inc.
DSC-4748/1
.EATURES:
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 (0.4
W typ. static)
Rail-to-Rail output swing for increased noise margin
Available in SSOP, TSSOP, and TVSOP packages
.UNCTIONAL BLOCK DIAGRAM
IDT74ALVCH162245
3.3V CMOS 16-BIT BUS
TRANSCIEVER WITH
3-STATE OUTPUTS
AND BUS-HOLD
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 mini-
mizes 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 structure
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
DRIVE .EATURES:
Balanced Output Drivers: 12mA (A port)
High Output Drivers: 24mA (B port)
1
D IR
1
A
1
1
A
2
1
A
3
1
A
4
1
A
5
1
A
6
1
A
7
1
A
8
1
B
8
1
B
7
1
B
6
1
B
5
1
B
4
1
B
3
1
B
2
1
B
1
1
O E
2
D IR
2
A
1
2
A
2
2
A
3
2
A
4
2
A
5
2
A
6
2
A
7
2
A
8
2
B
8
2
B
7
2
B
6
2
B
5
2
B
4
2
B
3
2
B
2
2
B
1
2
O E
1
47
46
44
43
41
40
38
37
12
11
9
8
6
5
3
2
48
24
36
35
33
32
30
29
27
26
23
22
20
19
17
16
14
13
25
INDUSTRIAL TEMPERATURE RANGE
2
IDT74ALVCH162245
3.3V CMOS 16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS
SSOP/ TSSOP/ TVSOP
TOP VIEW
PIN CON.IGURATION
1
DIR
1
B
1
GND
V
CC
GND
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
40
41
42
43
44
45
46
47
48
1
1
B
2
1
B
3
1
B
4
1
B
5
1
B
6
1
B
7
1
B
8
2
B
1
2
B
2
GND
2
B
3
2
B
4
2
B
6
2
B
5
V
CC
GND
2
B
8
2
B
7
2
DIR
1
OE
1
A
1
GND
V
CC
GND
1
A
2
1
A
3
1
A
4
1
A
5
1
A
6
1
A
7
1
A
8
2
A
1
2
A
2
GND
2
A
3
2
A
4
2
A
6
2
A
5
V
CC
GND
2
A
8
2
A
7
2
OE
NOTE:
1. As applicable to the device type.
Symbol
Parameter
(1)
Conditions
Typ.
Max.
Unit
C
IN
Input Capacitance
V
IN
= 0V
5
7
pF
C
OUT
Output Capacitance
V
OUT
= 0V
7
9
pF
C
I/O
I/O Port Capacitance
V
IN
= 0V
7
9
pF
Symbol
Description
Max
Unit
V
TERM
(2)
Terminal Voltage with Respect to GND
0.5 to +4.6
V
V
TERM
(3)
Terminal Voltage with Respect to GND
0.5 to V
CC
+0.5
V
T
STG
Storage Temperature
65 to +150
C
I
OUT
DC Output Current
50 to +50
mA
I
IK
Continuous Clamp Current,
50
mA
V
I
< 0 or V
I
> V
CC
I
OK
Continuous Clamp Current, V
O
< 0
50
mA
I
CC
Continuous Current through each
100
mA
I
SS
V
CC
or GND
ABSOLUTE MAXIMUM RATINGS
(1)
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
.
NOTE:
1. These pins have "Bus-Hold". All other pins are standard inputs, outputs, or I/Os.
CAPACITANCE
(T
A
= +25C, F = 1.0MHz)
Pin Names
Description
x
OE
Output Enable Inputs (Active LOW)
DIR
Direction Control Inputs
xAx
(1)
Side A Inputs or 3-State Outputs
xBx
(1)
Side B Inputs or 3-State Outputs
PIN DESCRIPTION
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
Inputs
x
OE
xDIR
Outputs
L
L
B data to A bus
L
H
A data to B bus
H
X
Isolation
.UNCTION TABLE
(EACH 8-BIT SECTION)
(1)
INDUSTRIAL TEMPERATURE RANGE
IDT74ALVCH162245
3.3V CMOS 16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS
3
Symbol
Parameter
Test Conditions
Min.
Typ.
(1)
Max.
Unit
V
IH
Input HIGH Voltage Level
V
CC
= 2.3V to 2.7V
1.7
--
--
V
V
CC
= 2.7V to 3.6V
2
--
--
V
IL
Input LOW Voltage Level
V
CC
= 2.3V to 2.7V
--
--
0.7
V
V
CC
= 2.7V to 3.6V
--
--
0.8
I
IH
Input HIGH Current
V
CC
= 3.6V
V
I
= V
CC
--
--
5
A
I
IL
Input LOW Current
V
CC
= 3.6V
V
I
= GND
--
--
5
A
I
OZH
High Impedance Output Current
V
CC
= 3.6V
V
O
= V
CC
--
--
10
A
I
OZL
(3-State Output pins)
V
O
= GND
--
--
10
V
IK
Clamp Diode Voltage
V
CC
= 2.3V, I
IN
= 18mA
--
0.7
1.2
V
V
H
Input Hysteresis
V
CC
= 3.3V
--
100
--
mV
I
CCL
Quiescent Power Supply Current
V
CC
= 3.6V
--
0.1
40
A
I
CCH
V
IN
= GND or V
CC
I
CCZ
I
CC
Quiescent Power Supply Current
One input at V
CC
- 0.6V, other inputs at V
CC
or GND
--
--
750
A
Variation
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Operating Condition: T
A
= 40C to +85C
NOTE:
1.
Typical values are at V
CC
= 3.3V, +25C ambient.
BUS-HOLD CHARACTERISTICS
Symbol
Parameter
(1)
Test Conditions
Min.
Typ.
(2)
Max.
Unit
I
BHH
Bus-Hold Input Sustain Current
V
CC
= 3V
V
I
= 2V
75
--
--
A
I
BHL
V
I
= 0.8V
75
--
--
I
BHH
Bus-Hold Input Sustain Current
V
CC
= 2.3V
V
I
= 1.7V
45
--
--
A
I
BHL
V
I
= 0.7V
45
--
--
I
BHHO
Bus-Hold Input Overdrive Current
V
CC
= 3.6V
V
I
= 0 to 3.6V
--
--
500
A
I
BHLO
NOTES:
1.
Pins with Bus-Hold are identified in the pin description.
2.
Typical values are at V
CC
= 3.3V, +25C ambient.
INDUSTRIAL TEMPERATURE RANGE
4
IDT74ALVCH162245
3.3V CMOS 16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS
OPERATING CHARACTERISTICS, T
A
= 25C
V
CC
= 2.5V 0.2V
V
CC
= 3.3V 0.3V
Symbol
Parameter
Test Conditions
Typical
Typical
Unit
C
PD
Power Dissipation Capacitance Outputs enabled
C
L
= 0pF, f = 10Mhz
23
30
pF
C
PD
Power Dissipation Capacitance Outputs disabled
4
5
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
= 40C to + 85C.
OUTPUT DRIVE CHARACTERISTICS (B PORT)
Symbol
Parameter
Test Conditions
(1)
Min.
Max.
Unit
V
OH
Output HIGH Voltage
V
CC
= 2.3V to 3.6V
I
OH
= 0.1mA
V
CC
0.2
--
V
V
CC
= 2.3V
I
OH
= 6mA
2
--
V
CC
= 2.3V
I
OH
= 12mA
1.7
--
V
CC
= 2.7V
2.2
--
V
CC
= 3V
2.4
--
V
CC
= 3V
I
OH
= 24mA
2
--
V
OL
Output LOW Voltage
V
CC
= 2.3V to 3.6V
I
OL
= 0.1mA
--
0.2
V
V
CC
= 2.3V
I
OL
= 6mA
--
0.4
I
OL
= 12mA
--
0.7
V
CC
= 2.7V
I
OL
= 12mA
--
0.4
V
CC
= 3V
I
OL
= 24mA
--
0.55
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
= 40C to + 85C.
OUTPUT DRIVE CHARACTERISTICS (A PORT)
Symbol
Parameter
Test Conditions
(1)
Min.
Max.
Unit
V
OH
Output HIGH Voltage
V
CC
= 2.3V to 3.6V
I
OH
= 0.1mA
V
CC
0.2
--
V
V
CC
= 2.3V
I
OH
= 4mA
1.9
--
I
OH
= 6mA
1.7
--
V
CC
= 2.7V
I
OH
= 4mA
2.2
--
I
OH
= 8mA
2
--
V
CC
= 3V
I
OH
= 6mA
2.4
--
I
OH
= 12mA
2
--
V
OL
Output LOW Voltage
V
CC
= 2.3V to 3.6V
I
OL
= 0.1mA
--
0.2
V
V
CC
= 2.3V
I
OL
= 4mA
--
0.4
I
OL
= 6mA
--
0.55
V
CC
= 2.7V
I
OL
= 4mA
--
0.4
I
OL
= 8mA
--
0.6
V
CC
= 3V
I
OL
= 6mA
--
0.55
I
OL
= 12mA
--
0.8
INDUSTRIAL TEMPERATURE RANGE
IDT74ALVCH162245
3.3V CMOS 16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS
5
SWITCHING CHARACTERISTICS (A PORT)
(1)
V
CC
= 2.5V 0.2V
V
CC
= 2.7V
V
CC
= 3.3V 0.3V
Symbol
Parameter
Min.
Max.
Min.
Max.
Min.
Max.
Unit
t
PLH
Propagation Delay
1
4.9
--
4.7
1
4.2
ns
t
PHL
xBx to xAx
t
PZH
Output Enable Time
1
6.8
--
6.7
1
5.6
ns
t
PZL
x
OE to xAx
t
PHZ
Output Disable Time
1
6.3
--
5.7
1
5.5
ns
t
PLZ
x
OE to xAx
t
SK
(o)
Output Skew
(2)
--
--
--
--
--
500
ps
NOTES:
1.
See TEST CIRCUITS AND WAVEFORMS. T
A
= 40C to + 85C.
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
V
CC
= 2.7V
V
CC
= 3.3V 0.3V
Symbol
Parameter
Min.
Max.
Min.
Max.
Min.
Max.
Unit
t
PLH
Propagation Delay
1
3.7
--
3.6
1
3
ns
t
PHL
xAx to xBx
t
PZH
Output Enable Time
1
5.7
--
5.4
1
4.4
ns
t
PZL
x
OE to xBx
t
PHZ
Output Disable Time
1
5.2
--
4.6
1
4.1
ns
t
PLZ
x
OE to xBx
t
SK
(o)
Output Skew
(2)
--
--
--
--
--
500
ps
NOTES:
1.
See TEST CIRCUITS AND WAVEFORMS. T
A
= 40C to + 85C.
2.
Skew between any two outputs of the same package and switching in the same direction.
INDUSTRIAL TEMPERATURE RANGE
6
IDT74ALVCH162245
3.3V CMOS 16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS
Open
V
LOAD
GND
V
CC
Pulse
Generator
D.U.T.
500
500
C
L
R
T
V
IN
V
OUT
(1, 2)
ALVC Link
INPUT
V
IH
0V
V
OH
V
OL
t
PLH1
t
SK
(x)
OUTPUT 1
OUTPUT 2
t
PHL1
t
SK
(x)
t
PLH2
t
PHL2
V
T
V
T
V
OH
V
T
V
OL
t
SK
(x)
= t
PLH2
-
t
PLH1
or
t
PHL2
-
t
PHL1
ALVC Link
SAME PHASE
INPUT TRANSITION
OPPOSITE PHASE
INPUT TRANSITION
0V
0V
V
OH
V
OL
t
PLH
t
PHL
t
PHL
t
PLH
OUTPUT
V
IH
V
T
V
T
V
IH
V
T
ALVC Link
DATA
INPUT
0V
0V
0V
0V
t
REM
TIMING
INPUT
SYNCHRONOUS
CONTROL
t
SU
t
H
t
SU
t
H
V
IH
V
T
V
IH
V
T
V
IH
V
T
V
IH
V
T
ALVC Link
ASYNCHRONOUS
CONTROL
LOW-HIGH-LOW
PULSE
HIGH-LOW -HIGH
PULSE
V
T
t
W
V
T
ALVC Link
CONTROL
INPUT
t
PLZ
0V
OUTPUT
NORMALLY
LOW
t
PZH
0V
SW ITCH
CLOSED
OUTPUT
NORMALLY
HIGH
ENABLE
DISABLE
SW ITCH
OPEN
t
PHZ
0V
V
LZ
V
OH
V
T
V
T
t
PZL
V
LOAD/2
V
LOAD/2
V
IH
V
T
V
OL
V
HZ
ALVC Link
TEST CIRCUITS AND WAVE.ORMS
Propagation Delay
Test Circuit for All Outputs
Enable and Disable Times
Set-up, Hold, and Release Times
NOTES:
1. For t
SK
(o) OUTPUT1 and OUTPUT2 are any two outputs.
2. For t
SK
(b) OUTPUT1 and OUTPUT2 are in the same bank.
DEFINITIONS:
C
L
= Load capacitance: includes jig and probe capacitance.
R
T
= Termination resistance: should be equal to Z
OUT
of the Pulse Generator.
NOTES:
1. Pulse Generator for All Pulses: Rate
1.0MHz; t
F
2.5ns; t
R
2.5ns.
2. Pulse Generator for All Pulses: Rate
1.0MHz; t
F
2ns; t
R
2ns.
Output Skew - t
SK
(
X
)
Pulse Width
NOTE:
1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
Symbol
V
CC
(1)
= 3.3V0.3V V
CC
(1)
= 2.7V
V
CC
(2)
= 2.5V0.2V
Unit
V
LOAD
6
6
2 x Vcc
V
V
IH
2.7
2.7
Vcc
V
V
T
1.5
1.5
Vcc
/ 2
V
V
LZ
300
300
150
mV
V
HZ
300
300
150
mV
C
L
50
50
30
pF
TEST CONDITIONS
SWITCH POSITION
Test
Switch
Open Drain
Disable Low
V
LOAD
Enable Low
Disable High
GND
Enable High
All Other Tests
Open
INDUSTRIAL TEMPERATURE RANGE
IDT74ALVCH162245
3.3V CMOS 16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS
7
ORDERING IN.ORMATION
ID T
X X
A LV C
X X X
X X
P ackage
D evice Type
Tem p. R ange
P V
P A
P F
162
74
S hrink S m all O utline P ackage
Thin S hrink S m all O utline P ackage
Thin V ery Sm all O utline P ackage
16-B it B us Transceiver w ith 3-S tate O utputs
40C to +85C
X
X X
Fam ily
B us-H old
245
B us-H old
D ouble-D ensity w ith R esistors, 12m A (A port)
24m A (B port)
H
CORPORATE HEADQUARTERS
for SALES:
for Tech Support:
2975 Stender Way
800-345-7015 or 408-727-6116
logichelp@idt.com
Santa Clara, CA 95054
fax: 408-492-8674
(408) 654-6459
www.idt.com
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