IDT74ALVCH16260
3.3V CMOS 12-BIT TO 24-BIT MULTIPLEXED D-TYPE LATCH
EXTENDED COMMERCIAL TEMPERATURE RANGE
3.3V CMOS 12-BIT TO 24-BIT
MULTIPLEXED D-TYPE LATCH
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 ALVCH16260:
– High Output Drivers: ±24mA
– Suitable for heavy loads
–
–
–
IDT74ALVCH16260
in which two separate data paths must be multiplexed onto, or
demultiplexed from, a single data path. Typical applications include
multiplexing and/or demultiplexing address and data information in
microprocessor or bus-interface applications. This device also is useful
in memory interleaving applications.
Three 12-bit I/O ports (A1-A12, 1B1-1B12, and 2B1-2B12) are
available for address and/or data transfer. The output-enable (OE1B,
OE2B, and OEA) inputs control the bus transceiver functions. The OE1B
and OE2B control signals also allow bank control in the A-to-B direction.
Address and/or data information can be stored using the internal storage
latches. The latch-enable (LE1B, LE2B, LEA1B, and LEA2B) inputs are
used to control data storage. When the latch-enable input is high, the
latch is transparent. When the latch-enable input goes low, the data
present at the inputs is latched and remains latched until the latch-enable
input is returned high.
The ALVCH16260 has been designed with a ±24mA output driver.
This driver is capable of driving a moderate to heavy load while
maintaining speed performance.
The ALVCH16260 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.
APPLICATIONS:
•
3.3V High Speed Systems
•
3.3V and lower voltage computing systems
DESCRIPTION:
This 12-bit to 24-bit multiplexed D-type latch is built using advanced
dual metal CMOS technology. The ALVCH16260 is used in applications
Functional Block Diagram
OE1B
LEA1B
29
30
A-1B
LATCH
12
1
B
1:12
LE1B
SEL
OEA
2
12
28
1
1B-A
LATCH
12
12
A
1:12
12
M
U
X
1
0
12
12
LE2B
27
2B-A
LATCH
12
LEA2B
OE2B
55
A-2B
LATCH
2
B
1:12
12
56
EXTENDED COMMERCIAL TEMPERATURE RANGE
1
c
1999 Integrated Device Technology, Inc.
MARCH 1999
DSC-4737/-
IDT74ALVCH16260
3.3V CMOS 12-BIT TO 24-BIT MULTIPLEXED D-TYPE LATCH
EXTENDED COMMERCIAL TEMPERATURE RANGE
PIN CONFIGURATION
OEA
LE1B
2
B
3
ABSOLUTE MAXIMUM RATING
Symbol
V
TERM(2)
O E2B
LEA2B
2
B
4
(1)
Unit
V
V
°C
mA
mA
mA
mA
NEW16link
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
S O 5 6 -1
S O 5 6 -2
S O 5 6 -3
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
V
TERM(3)
T
STG
I
OUT
I
IK
I
OK
I
CC
I
SS
GND
2
B
2
2
B
1
GND
2
B
5
2
B
6
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
V
CC
A
1
A
2
A
3
GND
A
4
A
5
A
6
A
7
A
8
A
9
GND
A
10
A
11
A
12
V
CC
1
B
1
1
B
2
V
CC
2
B
7
2
B
8
2
B
9
GND
2
B
10
2
B
11
2
B
12
1
B
12
1
B
11
1
B
10
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
GND
1
B
9
1
B
8
1
B
7
V
CC
1
B
6
1
B
5
NOTE:
1. As applicable to the device type.
GND
1
B
3
GND
1
B
4
LE2B
SEL
LEA1B
O E1B
FUNCTION TABLES(1)
B TO A (OEB = H)
Inputs
1
Bx
2
Bx
SSOP/
TSSOP/TVSOP
TOP VIEW
Output
LE2B
X
X
X
H
H
L
X
OEA
L
L
L
L
L
L
H
Ax
H
L
A
0
H
L
A
0
Z
(2)
(2)
H
L
X
X
X
X
X
X
X
X
H
L
X
X
SEL
H
H
H
L
L
L
X
LE1B
H
H
L
X
X
X
X
2
IDT74ALVCH16260
3.3V CMOS 12-BIT TO 24-BIT MULTIPLEXED D-TYPE LATCH
EXTENDED COMMERCIAL TEMPERATURE RANGE
FUNCTION TABLES (CONT'D)
A TO B (OEA = H)
Inputs
Ax
H
L
H
L
H
L
X
X
X
X
X
LEA1B LEA2B
H
H
H
H
H
L
L
L
X
X
X
X
H
L
L
H
H
L
X
X
X
X
OE1B
L
L
L
L
L
L
L
H
L
H
L
OE2B
L
L
L
L
L
L
L
H
H
L
L
1
Bx
Outputs
2
Bx
H
L
H
L
1
B
0
1
B
0
1
B
0
(2)
(2)
(2)
H
L
2
B
0
2
B
0
(2)
(2)
H
L
2
B
0
(2)
Z
Active
Z
Active
Z
Z
Active
Active
NOTES:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Z = High-Impedance
2. Output level before the indicated steady-state input conditions were
established.
PIN DESCRIPTION
Pin Names
Ax
(1:12)
1
Bx
(1:12)
2
Bx
(1:12)
I/O
I/O
I/O
I/O
I
I
I
I
I
I
I
I
Description
Bidirectional Data Port A. Usually connected to the CPU's Address/Data bus.
(1)
(1)
Bidirectional Data Port 1B. Connected to the even path or even bank of memory.
Bidirectional Data Port 2B. Connected to the odd path or odd bank of memory.
(1)
LEA1B
LEA2B
LE1B
LE2B
SEL
OEA
OE1B
OE2B
Latch Enable Input for A-1B latch. The latch is open when LEA1B is HIGH. Data from the A port is latched
on the HIGH to LOW transition of LEA1B.
Latch Enable Input for A-2B latch. The latch is open when LEA2B is HIGH. Data from the A port is latched
on the HIGH to LOW transition of LEA2B.
Latch Enable Input for 1B-A latch. The latch is open when LE1B is HIGH. Data from the 1B port is latched
on the HIGH to LOW transition of LE1B.
Latch Enable Input for 2B-A latch. The latch is open when LE2B is HIGH. Data from the 2B port is latched
on the HIGH to LOW transition of LE2B.
1B or 2B Path Selection. When HIGH, SEL enables data transfer from 1B port to A port. When LOW, SEL
enables data transfer from 2B port to A port.
Output Enable for A port (Active LOW)
Output Enable for 1B port (Active LOW)
Output Enable for 2B port (Active LOW)
NOTE:
1. These pins have “Bus-Hold.” All other pins are standard inputs, outputs, or I/Os.
3
IDT74ALVCH16260
3.3V CMOS 12-BIT TO 24-BIT MULTIPLEXED D-TYPE LATCH
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.
4
IDT74ALVCH16260
3.3V CMOS 12-BIT TO 24-BIT MULTIPLEXED D-TYPE LATCH
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
Parameter
C
PD
Power Dissipation Capacitance
Outputs enabled
C
PD
Power Dissipation Capacitance
Outputs disabled
Test Conditions
C
L
= 0pF, f = 10Mhz
Typical
37
4
V
CC
= 3.3V ± 0.3V
Typical
41
7
Unit
pF
pF
SWITCHING CHARACTERISTICS
V
CC
= 2.5V ± 0.2V
Symbol
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
PHZ
t
PLZ
t
SU
t
H
t
W
t
SK
(o)
Parameter
Propagation Delay
A
X
to
1
B
X
or Ax to
2
B
X
Propagation Delay
1
B
X
to A
X
or
2
B
X
to A
X
Propagation Delay
LE
X
B to A
X
Propagation Delay
LEA1B to
1
B
X
or LEA2B to
2
B
X
Propagation Delay
SEL to A
X
Output Enable Time
OEA to A
X
, OE1B to
1
B
X,
or OE2B to
2
B
X
Output Disable Time
OEA to A
X
, OE1B to
1
B
X
, or OE2B to
2
B
X
Setup Time, data before LE1B, LE2B, LEA1B,
LEA2B
Hold Time, data after LE1B, LE2B, LEA1B, LEA2B
Pulse Width, LE1B, LE2B, LEA1B, or LEA2B HIGH
Output Skew
(2)
Min.
1
1
1
1
1
1
1
1.4
1.6
3.3
—
Max.
5.4
5.4
5.6
5.6
6.9
6.7
5.7
—
—
—
—
—
—
—
—
—
—
—
1.1
1.9
3.3
—
V
CC
= 2.7V
Min.
Max.
5.1
5.1
5.2
5.2
6.6
6.4
5
—
—
—
—
V
CC
= 3.3V ± 0.3V
Min.
1.2
1.2
1
1
1.1
1
1.3
1.1
1.5
3.3
—
Max.
4.3
4.3
4.4
4.4
5.6
5.4
4.6
—
—
—
500
Unit
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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