INDUSTRIAL TEMPERATURE RANGE
IDT74LVC16501A
3.3V CMOS 18-BIT REGISTERED TRANSCEIVER
1
MARCH 1999
INDUSTRIAL TEMPERATURE RANGE
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
1999 Integrated Device Technology, Inc.
DSC-4481/2
FEATURES:
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 (0.4
W typ. static)
All inputs, outputs, and I/O are 5V tolerant
Supports hot insertion
Available in SSOP, TSSOP, and TVSOP packages
FUNCTIONAL BLOCK DIAGRAM
APPLICATIONS:
5V and 3.3V mixed voltage systems
Data communication and telecommunication systems
DRIVE FEATURES:
High Output Drivers: 24mA
Reduced system switching noise
IDT74LVC16501A
DESCRIPTION:
The LVC16501A is built using advanced dual metal CMOS technology.
This high-speed, low power 18-bit registered bus transceiver combines D-
type latches and D-type flip-flops to allow data flow in transparent, latched,
and clocked modes. Data flow in each direction is controlled by output-
enable (OEAB and OEBA), latch enable (LEAB and LEBA) and clock
(CLKAB and CLKBA) inputs. For A-to-B data flow, the device operates in
transparent mode when LEAB is high. When LEAB is low, the A data is
latched if CLKAB is held at a high or low logic level. If LEAB is low, the A
bus data is stored in the latch/flip-flop on the low-to-high transition of CLKAB.
OEAB performs the output enable function on the B port. Data flow from B
port to A port is similar but requires using OEBA, LEBA and CLKBA. Flow-
through organization of signal pins simplifies layout. All inputs are designed
with hysteresis for improved noise margin.
The LVC16501A has been designed with a 24mA output driver. This
driver is capable of driving a moderate to heavy load while maintaining
speed performance.
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.
B
1
C
D
C
D
A
1
LEAB
CLKAB
OEBA
LEBA
CLKBA
OEAB
TO 17 OTHER CHANNELS
C
D
C
D
1
30
28
27
55
2
3
54
3.3V CMOS 18-BIT
REGISTERED TRANSCEIVER
WITH 3-STATE OUTPUTS,
5 VOLT TOLERANT I/O
INDUSTRIAL TEMPERATURE RANGE
2
IDT74LVC16501A
3.3V CMOS 18-BIT REGISTERED TRANSCEIVER
SSOP/ TSSOP/ TVSOP
TOP VIEW
PIN CONFIGURATION
Symbol
Description
Max
Unit
V
TERM
Terminal Voltage with Respect to GND
0.5 to +6.5
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
I
OK
V
I
< 0 or V
O
< 0
I
CC
Continuous Current through each
100
mA
I
SS
V
CC
or GND
ABSOLUTE MAXIMUM RATINGS
(1)
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.
NOTE:
1. As applicable to the device type.
Symbol
Parameter
(1)
Conditions
Typ.
Max.
Unit
C
IN
Input Capacitance
V
IN
= 0V
4.5
6
pF
C
OUT
Output Capacitance
V
OUT
= 0V
6.5
8
pF
C
I/O
I/O Port Capacitance
V
IN
= 0V
6.5
8
pF
CAPACITANCE
(T
A
= +25C, F = 1.0MHz)
OEAB
LEAB
GND
A
2
A
3
V
CC
A
4
A
5
GND
A
6
A
7
A
8
A
9
GND
A
10
A
11
V
CC
A
12
A
13
OEBA
A
14
A
15
LEBA
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
48
49
50
51
52
53
54
55
56
1
GND
B
1
B
2
GND
B
3
B
4
V
CC
B
5
B
6
GND
B
7
B
8
B
9
B
10
GND
B
11
B
12
V
CC
B
13
B
14
GND
B
15
B
16
GND
A
16
A
17
25
26
27
28
32
31
30
29
B
18
GND
A
18
CLKBA
B
17
CLKAB
A
1
Pin Names
Description
OEAB
A-to-B Output Enable Input (Active HIGH)
OEBA
B-to-A Output Enable Input (Active LOW)
LEAB
A-to-B Latch Enable Input
LEBA
B-to-A Latch Enable Input
CLKAB
A-to-B Clock Input
CLKBA
B-to-A Clock Input
A x
A-to-B Data Inputs or B-to-A 3-State Outputs
B x
B-to-A Data Inputs or A-to-B 3-State Outputs
PIN DESCRIPTION
INDUSTRIAL TEMPERATURE RANGE
IDT74LVC16501A
3.3V CMOS 18-BIT REGISTERED TRANSCEIVER
3
NOTES:
1. H = HIGH Voltage Level
X = Don't Care
L = LOW Voltage Level
Z = High-Impedance
= LOW-to-HIGH transition
2. A-to-B data flow is shown. B-to-A data flow is similar but uses OEBA, LEBA, and CLKBA.
3. Output level before the indicated steady-state input conditions were established.
4. Output level before the indicated steady-state input conditions were established,
provided that CLKAB was HIGH before LEAB went LOW.
Inputs
Outputs
OEAB
LEAB
CLKAB
Ax
Bx
L
X
X
X
Z
H
H
X
L
L
H
H
X
H
H
H
L
L
L
H
L
H
H
H
L
L
X
B
(3)
H
L
H
X
B
(4)
FUNCTION TABLE
(1,2)
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 Leakage Current
V
CC
= 3.6V
V
I
= 0 to 5.5V
--
--
5
A
I
IL
I
OZH
High Impedance Output Current
V
CC
= 3.6V
V
O
= 0 to 5.5V
--
--
10
A
I
OZL
(3-State Output pins)
I
OFF
Input/Output Power Off Leakage
V
CC
= 0V, V
IN
or V
O
5.5V
--
--
50
A
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
V
IN
= GND or V
CC
--
--
10
A
I
CCH
I
CCZ
3.6
V
IN
5.5V
(2)
--
--
10
I
CC
Quiescent Power Supply Current
One input at V
CC
- 0.6V, other inputs at V
CC
or GND
--
--
500
A
Variation
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Operating Condition: T
A
= 40C to +85C
NOTES:
1. Typical values are at V
CC
= 3.3V, +25C ambient.
2. This applies in the disabled state only.
INDUSTRIAL TEMPERATURE RANGE
4
IDT74LVC16501A
3.3V CMOS 18-BIT REGISTERED TRANSCEIVER
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
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
2.2
--
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
OPERATING CHARACTERISTICS, V
CC
= 3.3V 0.3V, T
A
= 25C
Symbol
Parameter
Test Conditions
Typical
Unit
C
PD
Power Dissipation Capacitance per Transceiver Outputs enabled
C
L
= 0pF, f = 10Mhz
pF
C
PD
Power Dissipation Capacitance per Transceiver Outputs disabled
SWITCHING CHARACTERISTICS
(1)
V
CC
= 2.7V
V
CC
= 3.3V 0.3V
Symbol
Parameter
Min.
Max.
Min.
Max.
Unit
f
MAX
150
--
150
--
MHz
t
PLH
Propagation Delay
1.5
5.1
1.5
4.6
ns
t
PHL
Ax to Bx or Bx to Ax
t
PLH
Propagation Delay
1.5
5.6
1.5
5.3
ns
t
PHL
LEBA to Ax, LEAB to Bx
t
PLH
Propagation Delay
1.5
5.6
1.5
5.3
ns
t
PHL
CLKBA to Ax, CLKAB to Bx
t
PZH
Output Enable Time
1.5
6
1.5
5.6
ns
t
PZL
OEBA to Ax, OEAB to Bx
t
PHZ
Output Disable Time
1.5
5.6
1.5
5.2
ns
t
PLZ
OEBA to Ax, OEAB to Bx
t
SU
Set-up Time HIGH or LOW, Ax to CLKAB, Bx to CLKBA
3
--
3
--
ns
t
H
Hold Time HIGH or LOW, Ax to CLKAB, Bx to CLKBA
0
--
0
--
ns
t
SU
Set-up Time HIGH or LOW
Clock LOW
2.5
--
2.5
--
ns
Ax to LEAB, Bx to LEBA
Clock HIGH
2.5
--
2.5
--
t
H
Hold Time HIGH or LOW, Ax to LEAB, Bx to LEBA
1.5
--
1.5
--
ns
t
W
LEAB or LEBA Pulse Width HIGH or LOW
3
--
3
--
ns
t
W
CLKAB or CLKBA Pulse Width HIGH or LOW
3
--
3
--
ns
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
IDT74LVC16501A
3.3V CMOS 18-BIT REGISTERED TRANSCEIVER
5
Open
V
LOAD
GND
V
CC
Pulse
Generator
D.U.T.
500
500
C
L
R
T
V
IN
V
OUT
(1, 2)
LVC 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
LVC 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
LVC Link
DATA
INPUT
0V
0V
0V
0V
t
REM
TIMING
INPUT
ASYNCHRONOUS
CONTROL
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
LVC Link
LOW-HIGH-LOW
PULSE
HIGH-LOW-HIGH
PULSE
V
T
t
W
V
T
LVC Link
CONTROL
INPUT
t
PLZ
0V
OUTPUT
NORMALLY
LOW
t
PZH
0V
SWITCH
CLOSED
OUTPUT
NORMALLY
HIGH
ENABLE
DISABLE
SWITCH
OPEN
t
PHZ
0V
V
OL+
V
LZ
V
OH
V
T
V
T
t
PZL
V
LOAD/2
V
LOAD/2
V
IH
V
T
V
OL
V
OH-
V
HZ
LVC Link
TEST CIRCUITS AND WAVEFORMS
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
10MHz; t
F
2.5ns; t
R
2.5ns.
2. Pulse Generator for All Pulses: Rate
10MHz; 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
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