IDT74ALVCH16901
3.3V CMOS 18-BIT UNIVERSAL BUS TRANSCEIVER WITH PARITY
INDUSTRIAL TEMPERATURE RANGE
3.3V CMOS 18-BIT
IDT74ALVCH16901
UNIVERSAL BUS TRANSCEIVER
WITH PARITY GENERATORS/
CHECKERS AND BUS-HOLD
• 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 TSSOP package
FEATURES:
DESCRIPTION:
DRIVE FEATURES:
• High Output Drivers: ±24mA
• Suitable for heavy loads
APPLICATIONS:
• 3.3V high speed systems
• 3.3V and lower voltage computing systems
This 18-bit universal bus transceiver is built using advanced dual metal
CMOS technology. The ALVCH16901 is a dual 9-bit to dual 9-bit parity
transceiver with registers. The device can operate as a feed-through
transceiver or it can generate/check parity from the two 8-bit data buses in
either direction.
The ALVCH16901 features independent clock (CLKAB or CLKBA),
latch-enable (LEAB or LEBA), and dual 9-bit clock enable (CLKENAB or
CLKENBA)
inputs. It also provides parity-enable (SEL) and parity-select
(ODD/EVEN) inputs and separate error-signal (ERRA and
ERRB)
outputs
for checking parity. The direction of data flow is controlled by
OEAB
and
OEBA.
When
SEL
is low, the parity functions are enabled. When
SEL
is high,
the parity functions are disabled and the device acts as an 18-bit registered
transceiver.
The ALVCH16901 has been designed with a ±24mA output driver. This
driver is capable of driving a moderate to heavy load while maintaining
speed performance.
The ALVCH16901 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.
FUNCTIONAL BLOCK DIAGRAM
LEAB
1
CLKENAB
2
CLKENAB
2
1
32
3
30
2
CLKAB
OEAB
35
OEBA
1
A
1
-
1
A
8
1
APAR
1
ERRB
2
A
1
-
2
A
8
2
APAR
2
ERRB
28
36
5
61
18
A-Port
Parity
Generate
and
Check
B Data
18-Bit
Storage
18
Q
A
B-Port
Parity
Generate
and
Check
A Data
18
29
60
4
1
B
1
-
1
B
8
1
BPAR
1
ERRA
2
B
1
-
2
A
8
37
2
BPAR
2
ERRA
18
Q
B
18-Bit
Storage
ODD/EVEN
SEL
34
31
62
CLKBA
1
CLKENBA
2
CLKENBA
2
64
33
63
LEBA
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
©2000 Integrated Device Technology, Inc.
JUNE 2000
DSC-4582/1
IDT74ALVCH16901
3.3V CMOS 18-BIT UNIVERSAL BUS TRANSCEIVER WITH PARITY
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
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
29
30
31
32
TSSOP
TOP VIEW
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
Description
Max
V
TERM
(2)
Terminal Voltage with Respect to GND
–0.5 to +4.6
–0.5 to V
CC
+0.5
–65 to +150
–50 to +50
±50
–50
±100
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
Unit
V
V
°C
mA
mA
mA
mA
1
CLKENAB
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
1
CLKENBA
LEAB
CLKAB
1
ERRA
1
APAR
LEBA
CLKBA
1
ERRB
1
BPAR
GND
1
A
1
1
A
2
1
A
3
GND
1
B
1
1
B
2
1
B
3
V
CC
1
A
4
1
A
5
1
A
6
V
CC
1
B
4
1
B
5
1
B
6
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
OUT
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
GND
1
A
7
1
A
8
2
A
1
2
A
2
GND
1
B
7
1
B
8
2
B
1
2
B
2
NOTE:
1. As applicable to the device type.
GND
2
A
3
2
A
4
2
A
5
GND
2
B
3
2
B
4
2
B
5
PIN DESCRIPTION
Pin Names
OEAB
OEBA
LEAB
LEBA
xCLKENAB
xCLKENBA
CLKAB
CLKBA
xERRA
xERRB
xAPAR
xBPAR
ODD/EVEN
SEL
xAx
xBx
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 9-bit Clock Enables
B-to-A 9-bit Clock Enables
A-to-B Clock Input
B-to-A Clock Input
A Error-Signal Outputs
B Error-Signal Outputs
A Port Parities
B Port Parities
Parity Select Input
Parity Enables
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)
V
CC
2
A
6
2
A
7
2
A
8
V
CC
2
B
6
2
B
7
2
B
8
GND
2
APAR
2
ERRA
GND
2
BPAR
2
ERRB
OEAB
SEL
2
CLKENAB
OEBA
ODD/EVEN
2
CLKENBA
NOTE:
1. These pins have "Bus-Hold". All other pins are standard inputs, outputs, or I/Os.
2
IDT74ALVCH16901
3.3V CMOS 18-BIT UNIVERSAL BUS TRANSCEIVER WITH PARITY
INDUSTRIAL TEMPERATURE RANGE
FUNCTION TABLE
(1,2)
Inputs
CLKENAB
X
X
X
H
L
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
↑
↑
L
H
xAx
X
L
H
X
L
H
X
X
Outputs
xBx
Z
L
H
B
(3)
L
H
B
(3)
B
(4)
PARITY ENABLE
Inputs
SEL OEBA OEAB
L
L
L
L
H
H
H
H
H
L
H
L
L
L
H
H
L
H
H
L
L
H
L
H
Operation or Function
Parity is checked on port A and is generated on port B.
Parity is checked on port B and is generated on port A.
Parity is checked on port B and port A.
Parity is generated on port A and B if device is in FF
mode.
Parity functions are
Q
A
data to B, Q
B
data to A
disabled; device acts as
Q
B
data to A
a standard 18-bit
Q
A
data to B
registered transceiver.
Isolation
NOTES:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
↑
= LOW-to-HIGH Transition
2. A-to-B data flow is shown. B-to-A data flow is similar but uses
OEBA,
LEBA,
and
CLKENBA.
3. Output level before the indicated steady-state conditions were established.
4. Output level before the indicated steady-state conditions were established,
provided that CLKAB was LOW before LEAB went LOW.
PARITY
SEL
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
OEBA
H
H
H
H
L
L
L
L
H
H
H
H
L
L
L
L
H
H
H
H
H
H
H
H
L
L
OEAB
L
L
L
L
H
H
H
H
L
L
L
L
H
H
H
H
H
H
H
H
H
H
H
H
L
L
ODD/EVEN
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
L
L
L
L
H
H
H
H
L
H
Inputs
∑
OF INPUTS
A1-−A8 = H
−
0, 2, 4, 6, 8
1, 3, 5, 7
0, 2, 4, 6, 8
1, 3, 5, 7
N/A
N/A
N/A
N/A
0, 2, 4, 6, 8
1, 3, 5, 7
0, 2, 4, 6, 8
1, 3, 5, 7
N/A
N/A
N/A
N/A
0, 2, 4, 6, 8
1, 3, 5, 7
0, 2, 4, 6, 8
1, 3, 5, 7
0, 2, 4, 6, 8
1, 3, 5, 7
0, 2, 4, 6, 8
1, 3, 5, 7
N/A
N/A
Outputs
∑
OF INPUTS
B1—−B8 = H
−
N/A
N/A
N/A
N/A
0, 2, 4, 6, 8
1, 3, 5, 7
0, 2, 4, 6, 8
1, 3, 5, 7
N/A
N/A
N/A
N/A
0, 2, 4, 6, 8
1, 3, 5, 7
0, 2, 4, 6, 8
1, 3, 5, 7
0, 2, 4, 6, 8
1, 3, 5, 7
0, 2, 4, 6, 8
1, 3, 5, 7
0, 2, 4, 6, 8
1, 3, 5, 7
0, 2, 4, 6, 8
1, 3, 5, 7
N/A
N/A
xAPAR
L
L
H
H
N/A
N/A
N/A
N/A
L
L
H
H
N/A
N/A
N/A
N/A
L
L
H
H
L
L
H
H
N/A
N/A
xBPAR
N/A
N/A
N/A
N/A
L
L
H
H
N/A
N/A
N/A
N/A
L
L
H
H
L
L
H
H
L
L
H
H
N/A
N/A
xAPAR
N/A
N/A
N/A
N/A
L
H
L
H
N/A
N/A
N/A
N/A
H
L
H
L
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
PE
(1)
PO
(2)
xERRA
H
L
L
H
Z
Z
Z
Z
L
H
H
L
Z
Z
Z
Z
H
L
L
H
L
H
H
L
Z
Z
xBPAR
L
H
L
H
N/A
N/A
N/A
N/A
H
L
H
L
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
PE
(1)
PO
(2)
xERRB
Z
Z
Z
Z
H
L
L
H
Z
Z
Z
Z
L
H
H
L
H
L
L
H
L
H
H
L
Z
Z
NOTES:
1. Parity output is set to the level so that the specific bus side is set to even parity.
2. Parity output is set to the level so that the specific bus side is set to odd parity.
3
IDT74ALVCH16901
3.3V CMOS 18-BIT UNIVERSAL BUS TRANSCEIVER WITH PARITY
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
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
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
= 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
4
IDT74ALVCH16901
3.3V CMOS 18-BIT UNIVERSAL BUS TRANSCEIVER WITH PARITY
INDUSTRIAL TEMPERATURE RANGE
OUTPUT DRIVE CHARACTERISTICS
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.
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
22
5
V
CC
= 3.3V ± 0.3V
Typical
27
8
Unit
pF
5
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