IDT74ALVCH162601
3.3V CMOS 18-BIT UNIVERSAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
3.3V CMOS 18-BIT UNIVERSAL
IDT74ALVCH162601
BUS TRANSCEIVER WITH
3-STATE OUTPUTS
AND BUS-HOLD
FEATURES:
• 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
DESCRIPTION:
This 18-bit universal bus transceiver is built using advanced dual metal
CMOS technology. The ALVCH162601 combines D-type latchesand D-type
flip-flops to allow data flow in transparent, latched, clocked, and clock-enabled
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. The
clock can be controlled by the clock-enable (CLKENAB and
CLKENBA)
inputs.
For A-to-B data flow, the device operates in the 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 data is stored in the latch/flip-flop on the low-
to-high transition of CLKAB. When
OEAB
is low, the outputs are active. When
OEAB
is high, the outputs are in the high-impedance state.
Data flow for B to A is similar to that of A to B but uses
OEBA,
LEBA, CLKBA
and
CLKENBA.
The ALVCH162601 has series resistors in the device output structure of the
“B” 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 “A” port has a ±24mA driver.
The ALVCH162601 has “bus-hold” which retains the inputs’ last state
whenever the input goes to a high impedance. This prevents floating inputs and
eliminates the need for pull-up/down resistors.
DRIVE FEATURES:
• High Output Drivers: ±24mA (A port)
• Balanced Output Drivers: ±12mA (B port)
APPLICATIONS:
• 3.3V high speed systems
• 3.3V and lower voltage computing systems
FUNCTIONAL BLOCK DIAGRAM
OEAB
CLKENAB
55
1
56
CLKAB
LEAB
LEBA
CLKBA
CLKENBA
OEBA
A
1
2
28
30
29
27
CE
3
1D
C1
CLK
54
B
1
CE
1D
C1
CLK
TO 17 OTHER CHANNELS
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
© 1999 Integrated Device Technology, Inc.
MARCH 1999
DSC-4733/1
IDT74ALVCH162601
3.3V CMOS 18-BIT UNIVERSAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL 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
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
CLKENA B
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
CLKENB A
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
Description
Max
–0.5 to +4.6
–0.5 to V
CC
+0.5
–65 to +150
–50 to +50
±50
–50
±100
Unit
V
V
°C
mA
mA
mA
mA
V
TERM
(2)
Terminal Voltage with Respect to GND
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
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
.
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
NOTE:
1. As applicable to the device type.
FUNCTION TABLE
(1,2)
Inputs
CLKENAB
X
X
X
H
H
L
L
L
OEAB
H
L
L
L
L
L
L
L
LEAB
X
H
H
L
L
L
L
L
CLKAB
X
X
X
X
X
↑
↑
L or H
Ax
X
L
H
X
X
L
H
X
Outputs
Bx
Z
L
H
B
0(3)
B
0(3)
L
H
B
0(3)
SSOP/ TSSOP/ TVSOP
TOP VIEW
PIN DESCRIPTION
Pin Names
OEAB
OEBA
LEAB
LEBA
CLKAB
CLKBA
Ax
Bx
CLKENAB
CLKENBA
Description
A-to-B Output Enable Input (Active LOW)
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
(1)
B-to-A Data Inputs or A-to-B 3-State Outputs
(1)
A-to-B Clock Enable Input (Active LOW)
B-to-A Clock Enable Input (Active LOW)
NOTES:
1. A-to-B data flow is shown. B-to-A data flow is similar but uses
OEBA,
LEBA,
CLKBA, and
CLKENBA.
2. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Z = High Impedance
↑
= LOW-to-HIGH transition
3. Output level before the indicated steady-state input conditions were established.
NOTE:
1. These pins have "Bus-Hold". All other pins are standard inputs, outputs, or I/Os.
2
IDT74ALVCH162601
3.3V CMOS 18-BIT UNIVERSAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
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
Parameter
Input HIGH Voltage Level
V
CC
= 2.3V to 2.7V
V
CC
= 2.7V to 3.6V
V
IL
I
IH
I
IL
I
OZH
I
OZL
V
IK
V
H
I
CCL
I
CCH
I
CCZ
∆I
CC
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
= 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
IDT74ALVCH162601
3.3V CMOS 18-BIT UNIVERSAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
OUTPUT DRIVE CHARACTERISTICS (A PORT)
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.
OUTPUT DRIVE CHARACTERISTICS (B PORT)
Symbol
V
OH
Parameter
Output HIGH Voltage
V
CC
= 2.3V
V
CC
= 2.7V
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
Test Conditions
(1)
V
CC
= 2.3V to 3.6V
I
OH
= – 0.1mA
I
OH
= – 4mA
I
OH
= – 6mA
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
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.
4
IDT74ALVCH162601
3.3V CMOS 18-BIT UNIVERSAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
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
41
6
V
CC
= 3.3V ± 0.3V
Typical
50
6
Unit
pF
SWITCHING CHARACTERISTICS (A AND B PORTS)
(1)
V
CC
= 2.5V ± 0.2V
Symbol
f
MAX
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PZH
t
PZL
t
PZH
t
PZL
t
PZH
t
PZL
t
PZH
t
PZL
t
SU
t
SU
t
SU
t
SU
t
H
t
H
t
H
t
H
t
W
t
W
t
SK(O)
Propagation Delay
Ax to Bx
Propagation Delay
Bx to Ax
Propagation Delay
LEXB to Ax
Propagation Delay
LEXB to Bx
Propagation Delay
CLKAB to Bx
Propagation Delay
CLKBA to Ax
Output Enable Time
OEAB
to Bx
Output Enable Time
OEBA
to Ax
Output Disable Time
OEAB
to Bx
Output Disable Time
OEBA
to Ax
Set-up Time, data before CLK↑
Set-up Time, data before LE↓, CLK HIGH
Set-up Time, data before LE↓, CLK LOW
Set-up Time,
CLKEN
before CLK↑
Hold Time, data after CLK↑
Hold Time, data after LE↓, CLK HIGH
Hold Time, data after LE↓, CLK LOW
Hold Time,
CLKEN
after CLK↑
Pulse Width, LE HIGH
Pulse Width, CLK HIGH or LOW
Output Skew
(2)
2.3
2
1.3
2
0.7
1.3
1.7
0.3
3.3
3.3
—
—
—
—
—
—
—
—
—
—
—
—
2.4
1.6
1.2
2
0.7
1.6
2
0.5
3.3
3.3
—
—
—
—
—
—
—
—
—
—
—
—
2.1
1.6
1.1
1.7
0.8
1.4
1.7
0.6
3.3
3.3
—
—
—
—
—
—
—
—
—
—
—
500
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ps
1.3
5.2
—
4.8
1.8
4.4
ns
1.8
5.7
—
5.3
1.8
4.8
ns
1.1
5.5
—
6.1
1.1
5.2
ns
1.6
6.1
—
6.7
1.6
5.7
ns
1.3
5.6
—
5.8
1.4
5
ns
1.5
6.1
—
6.3
1.6
5.5
ns
1
5
—
5.3
1
4.7
ns
1
5.5
—
5.9
1.5
5.1
ns
1
4.3
—
4.6
1
4.1
ns
Parameter
Min.
140
1.3
Max.
—
4.8
V
CC
= 2.7V
Min.
150
—
Max.
—
5.2
V
CC
= 3.3V ± 0.3V
Min.
150
1.6
Max.
—
4.5
Unit
MHz
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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