IDT74ALVCH16500
3.3V CMOS 18-BIT UNIVERSAL BUS TRANSCEIVER
EXTENDED COMMERCIAL TEMPERATURE RANGE
3.3V CMOS 18-BIT
UNIVERSAL BUS TRANS-
CEIVER 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 ALVCH16500:
– High Output Drivers: ±24mA
– Suitable for heavy loads
–
–
–
IDT74ALVCH16500
DESCRIPTION:
This 18-bit universal bus transceiver is built using advanced dual
metal CMOS technology. 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 high-to-low
transition of CLKAB. OEAB performs the output enable function on the B
port. Data flow from B port to A port is similiar 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 ALVCH16500 has been designed with a ±24mA output driver.
This driver is capable of driving a moderate to heavy load while
maintaining speed performance.
The ALVCH16500 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
OEAB
CLKAB
1
55
LEAB
LEBA
CLKBA
OEBA
2
28
30
27
A
1
3
1D
C1
CLK
54
B
1
1D
C1
CLK
TO 17 OTHER CHANNELS
EXTENDED COMMERCIAL TEMPERATURE RANGE
1
c
1999 Integrated Device Technology, Inc.
APRIL 1999
DSC-4539/1
IDT74ALVCH16500
3.3V CMOS 18-BIT UNIVERSAL BUS TRANSCEIVER
EXTENDED COMMERCIAL TEMPERATURE RANGE
PIN CONFIGURATION
OEAB
LEAB
A
1
GND
A
2
A
3
V
CC
A
4
A
5
A
6
GND
A
7
A
8
A
9
A
10
A
11
A
12
GND
A
13
A
14
A
15
V
CC
A
16
A
17
GND
A
18
OEBA
LEBA
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
SO56-1
SO56-2
SO56-3
ABSOLUTE MAXIMUM RATING
Symbol
V
TERM(2)
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
GND
CLKAB
B
1
GND
B
2
B
3
V
CC
B
4
B
5
B
6
GND
B
7
B
8
B
9
B
10
B
11
B
12
GND
B
13
B
14
B
15
V
CC
B
16
B
17
GND
B
18
CLKBA
GND
(1)
Unit
V
V
°C
mA
mA
mA
mA
NEW16link
V
TERM(3)
T
STG
I
OUT
I
IK
I
OK
I
CC
I
SS
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
Max.
– 0.5 to + 4.6
– 0.5 to
V
CC
+ 0.5
– 65 to + 150
– 50 to + 50
± 50
– 50
±100
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
.
PIN DESCRIPTION
Pin Names
OEAB
OEBA
LEAB
LEBA
CLKAB
CLKBA
Ax
Bx
Description
A-to-B Output Enable Input
B-to-A Output Enable Input (Active LOW)
A-to-B Latch Enable Input
B-to-A Latch Enable Input
A-to-B Clock Input
B-to-A Clock Input
A-to-B Data Inputs or B-to-A 3-State Outputs
B-to-A Data Inputs or A-to-B 3-State Outputs
(1)
(1)
SSOP/TSSOP/TVSOP
TOP VIEW
NOTE:
1. These pins have “Bus-Hold.” All other pins are standard inputs,
outputs, or I/Os.
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
NOTE:
1. As applicable to the device type.
2
IDT74ALVCH16500
3.3V CMOS 18-BIT UNIVERSAL BUS TRANSCEIVER
EXTENDED COMMERCIAL TEMPERATURE RANGE
FUNCTION TABLE
OEAB
L
H
H
H
H
H
Inputs
LEAB
CLKAB
X
H
H
L
L
L
X
X
X
↓
↓
L or H
(1, 2)
Output
Ax
X
L
H
L
H
X
Bx
Z
L
H
L
H
B
0(3)
NOTES:
1. A-to-B data flow is shown. B-to-A data flow is similar but uses
OEBA,
LEBA, and
CLKBA.
2. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Z = High-Impedance
↓
= HIGH-to-LOW Transition
3. Output level before the indicated steady-state input conditions were es-
tablished.
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.
3
IDT74ALVCH16500
3.3V CMOS 18-BIT UNIVERSAL BUS TRANSCEIVER
EXTENDED COMMERCIAL TEMPERATURE RANGE
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.
OUTPUT DRIVE CHARACTERISTICS
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.
4
IDT74ALVCH16500
3.3V CMOS 18-BIT UNIVERSAL BUS TRANSCEIVER
EXTENDED COMMERCIAL TEMPERATURE RANGE
OPERATING CHARACTERISTICS, T
A
= 25
o
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
40
6
V
CC
= 3.3V ± 0.3V
Typical
51
6
Unit
pF
pF
SWITCHING CHARACTERISTICS
Symbol
f
MAX
t
PLH
t
PHL
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
H
t
SU
t
H
t
W
t
W
t
SK
(o)
Parameter
Propagation Delay
Ax to Bx or Bx to Ax
Propagation Delay
LEBA to Ax or LEAB to Bx
Propagation Delay
CLKBA to Ax or CLKAB to Bx
Output Enable Time
OEBA to Ax
Output Enable Time
OEAB to Bx
Output Disable Time
OEBA to Ax
Output Disable Time
OEAB to Bx
Set-up Time, HIGH or LOW, Ax to CLKAB or
Bx to CLKBA
Hold Time, HIGH or LOW, Ax to CLKAB or
Bx to CLKBA
Set-up Time, HIGH or LOW,
CLK LOW
Ax to LEAB or Bx to LEBA
Hold Time, HIGH or LOW,
Ax to LEAB or Bx to LEBA
Pulse Width, LE HIGH
Pulse Width, CLK HIGH or LOW
Output Skew
(2)
CLK HIGH
CLK LOW
CLK HIGH
(1)
V
CC
= 2.5V ± 0.2V
Min.
150
1
1
1
1
1
1
1
1.7
1.7
1.9
1.1
1.6
2
3.3
3.3
—
Max.
—
5.1
5.9
6.6
6.2
5.7
5.4
6.1
—
—
—
—
—
—
—
—
—
V
CC
= 2.7V
Min.
150
—
—
—
—
—
—
—
1.4
1.6
1.6
1
1.5
1.8
3.3
3.3
—
Max.
—
4.7
5.5
6.6
6.2
5.4
4.6
5.7
—
—
—
—
—
—
—
—
—
V
CC
= 3.3V ± 0.3V
Min.
150
1
1
1.1
1
1
1
1.5
1.3
1.3
1.4
1
1.2
1.5
3.3
3.3
—
Max.
—
3.9
4.7
5.5
5.2
4.6
4.3
5
—
—
—
—
—
—
—
—
500
Unit
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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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