IDT74ALVCH16835
3.3V CMOS 18-BIT UNIVERSAL BUS DRIVER W/3-STATE OUTPUTS
EXTENDED COMMERCIAL TEMPERATURE RANGE
3.3V CMOS 18-BIT
UNIVERSAL BUS DRIVER
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
IDT74ALVCH16835
DESCRIPTION:
This 18-bit universal bus driver is built using advanced dual metal
CMOS technology. Data flow from A to Y is controlled by the output-enable
(OE) input. The device operates in the transparent mode when the latch-
enable (LE) input is high. The A data is latched if the clock (CLK) input is
held at a high or low logic level. If LE is low, the A data is stored in the latch
flip-flop on the low-to-high transition of CLK. When
OE
is high, the outputs
are in the high-impedance state.
The ALVCH16835 has been designed with a ±24mA output driver. This
driver is capable of driving a moderate to heavy load while maintaining
speed performance.
The ALVCH16835 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.
Drive Features for ALVCH16835:
−
High Output Drivers: ±24mA
−
Suitable for heavy loads
APPLICATIONS:
•
•
•
SDRAM Modules
PC Motherboards
Workstations
Functional Block Diagram
OE
27
CLK
30
LE
28
A
1
54
1
D
3
C
1
CLK
Y
1
TO 17 OTHER CHANNELS
EXTENDED COMMERCIAL TEMPERATURE RANGE
1
c
1999 Integrated Device Technology, Inc.
MARCH 1999
DSC-4570/1
IDT74ALVCH16835
3.3V CMOS 18-BIT UNIVERSAL BUS DRIVER W/3-STATE OUTPUTS
EXTENDED COMMERCIAL TEMPERATURE RANGE
PIN CONFIGURATION
NC
NC
Y
1
GND
Y
2
Y
3
V
CC
Y
4
Y
5
Y
6
GND
Y
7
Y
8
Y
9
Y
10
Y
11
Y
12
GND
Y
13
Y
14
Y
15
V
CC
Y
16
Y
17
GND
Y
18
OE
LE
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
SO56-1
SO56-2 43
SO56-3
42
41
40
39
38
37
36
35
34
33
32
31
30
29
GND
NC
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
CLK
GND
ABSOLUTE MAXIMUM RATING
Symbol
V
TERM(2)
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
(1)
Unit
V
V
°C
mA
mA
mA
mA
NEW16link
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
.
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.
FUNCTION TABLE
(1)
Inputs
OE
H
L
L
L
L
L
L
LE
X
H
H
L
L
L
L
CLK
X
X
X
↑
↑
H
L
Ax
X
L
H
L
H
X
X
Outputs
Yx
Z
L
H
L
H
Y
0(2)
Y
0(3)
SSOP/
TSSOP/TVSOP
TOP VIEW
PIN DESCRIPTION
Pin Names
OE
CLK
LE
Ax
Yx
Description
3-State Output Enable Inputs (Active LOW)
Register Input Clock
Latch Enable (Transparent HIGH)
Data Inputs
(1)
3-State Outputs
NOTE:
1. These pins have “Bus-Hold.” All other pins are standard inputs,
outputs, or I/Os.
c 1998 Integrated Device Technology, Inc.
NOTES:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Z = High-Impedance
↑
= LOW-to-HIGH Transition
2. Output level before indicated steady-state input conditions were estab-
lished, provided that CLK is HIGH before LE went LOW.
3. Output level before the indicated steady-state input conditions were
established.
2
DSC-123456
IDT74ALVCH16835
3.3V CMOS 18-BIT UNIVERSAL BUS DRIVER W/3-STATE OUTPUTS
EXTENDED COMMERCIAL TEMPERATURE RANGE
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.
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.
3
IDT74ALVCH16835
3.3V CMOS 18-BIT UNIVERSAL BUS DRIVER W/3-STATE OUTPUTS
EXTENDED COMMERCIAL TEMPERATURE RANGE
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.
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
26
12
V
CC
= 3.3V ± 0.3V
Typical
31
14
Unit
pF
pF
4
IDT74ALVCH16835
3.3V CMOS 18-BIT UNIVERSAL BUS DRIVER W/3-STATE OUTPUTS
EXTENDED COMMERCIAL TEMPERATURE RANGE
SWITCHING CHARACTERISTICS
(1)
V
CC
= 2.5V ± 0.2V
Symbol
f
MAX
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
W
t
W
t
SU
t
SU
t
SU
t
H
t
H
t
SK
(o)
Parameter
Propagation Delay
Ax to Yx
Propagation Delay
LE to Yx
Propagation Delay
CLK to Yx
Output Enable Time
OE
to Yx
Output Disable Time
OE
to Yx
Pulse Duration, LE HIGH
Pulse Duration, CLK HIGH or LOW
Setup Time, data before CLK↑
Setup Time, data before LE↓, CLK HIGH
Setup Time, data before LE↓, CLK LOW
Hold Time, data after CLK↑
Hold Time, data after LE
↓,
CLK HIGH or LOW
Output Skew
(2)
Min
.
150
1
1.3
1.4
1.4
1
3.3
3.3
2.2
1.9
1.3
0.6
1.4
—
Max.
—
4.2
5
5.5
5.5
4.5
—
—
—
—
—
—
—
—
V
CC
= 2.7V
Min
.
150
—
—
—
—
—
3.3
3.3
2.1
1.6
1.1
0.6
1.7
—
Max.
—
4.2
4.9
5.2
5.6
4.3
—
—
—
—
—
—
—
—
V
CC
= 3.3V ± 0.3V
Min
.
150
1
1.3
1.4
1.1
1.3
3.3
3.3
1.7
1.5
1
0.7
1.4
—
Max.
—
3.6
4.2
4.5
4.6
3.9
—
—
—
—
—
—
—
500
Unit
MHz
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.
SWITCHING CHARACTERISTICS FROM 0
o
C TO 65
o
C, C
L
= 50 pF
V
CC
= 3.3V ± 0.15V
Symbol
t
PLH
t
PHL
Parameter
Propagation Delay
CLK to Yx
Min.
1.7
Max.
4.5
Unit
pF
5
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