IDT74ALVCH16374
3.3V CMOS 16-BIT EDGE-TRIGGERED D-TYPE LATCH WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
3.3V CMOS 16-BIT EDGE-
TRIGGERED D-TYPE
LATCH WITH 3-STATE
OUTPUTS 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 SSOP, TSSOP, and TVSOP packages
IDT74ALVCH16374
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 16-bit edge-triggered D-type flip-flop is built using advanced dual metal
CMOS technology. The ALVCH16374 is particularly suitable for implementing
buffer registers, I/O ports, bidirectional bus drivers, and working registers. It can
be used as two 8-bit flip-flops or one 16-bit flip-flop. On the positive transition of
the clock (CLK) input, the Q outputs of the flip-flop take on the logic levels at the
data (D) inputs.
OE
can be used to place the eight outputs in either a normal logic
state (high or low logic levels) or a high-impedance state. In the high-impedance
state, the outputs neither load nor drive the bus lines significantly. The high-
impedance state and the increased drive provide the capability to drive bus lines
without need for interface or pullup components.
OE
does not affect internal
operations of the flip-flop. Old data can be retained or new data can be entered
while the outputs are in the high-impedance state.
The ALVCH16374 has been designed with a ±24mA output driver. This
driver is capable of driving a moderate to heavy load while maintaining speed
performance.
The ALVCH16374 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 resistor.
FUNCTIONAL BLOCK DIAGRAM
1
OE
1
2
OE
24
1
C LK
48
2
CLK
25
C1
2
C1
1
Q
1
2
D
1
36
13
2
Q
1
1
D
1
47
1D
1D
TO 7 OTHER C HANN ELS
TO 7 OTHER CH ANNELS
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
© 1999 Integrated Device Technology, Inc.
APRIL 1999
DSC-4564/1
IDT74ALVCH16374
3.3V CMOS 16-BIT EDGE-TRIGGERED D-TYPE LATCH WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
1
CLK
1
D
1
1
D
2
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
OE
1
Q
1
1
Q
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
GND
1
Q
3
1
Q
4
GND
1
D
3
1
D
4
V
CC
1
Q
5
1
Q
6
V
CC
1
D
5
1
D
6
GND
1
Q
7
1
Q
8
2
Q
1
2
Q
2
GND
1
D
7
1
D
8
2
D
1
2
D
2
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
GND
2
Q
3
2
Q
4
GND
2
D
3
2
D
4
NOTE:
1. As applicable to the device type.
V
CC
2
Q
5
2
Q
6
V
CC
2
D
5
2
D
6
PIN DESCRIPTION
Pin Names
xDx
xCLK
xQx
xOE
Data Inputs
(1)
Clock Inputs
3-State Outputs
3-State Output Enable Input (Active LOW)
Description
GND
2
Q
7
2
Q
8
2
OE
GND
2
D
7
2
D
8
2
CLK
NOTE:
1. These pins have "Bus-Hold". All other pins are standard inputs, outputs, or I/Os.
FUNCTION TABLE
(EACH FLIP-FLOP)
(1)
SSOP/ TSSOP/ TVSOP
TOP VIEW
Inputs
xOE
L
L
L
H
xCLK
↑
↑
H or L
X
xDx
H
L
X
X
Output
xQx
H
L
Q
(2)
Z
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 the indicated steady-state input conditions were established.
2
IDT74ALVCH16374
3.3V CMOS 16-BIT EDGE-TRIGGERED D-TYPE LATCH 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
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
3
IDT74ALVCH16374
3.3V CMOS 16-BIT EDGE-TRIGGERED D-TYPE LATCH WITH 3-STATE OUTPUTS
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
31
16
V
CC
= 3.3V ± 0.3V
Typical
30
18
Unit
pF
SWITCHING CHARACTERISTICS
(1)
V
CC
= 2.5V ± 0.2V
Symbol
f
MAX
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
SU
t
H
t
W
t
SK
(o)
Propagation Delay
xCLK to xQx
Output Enable Time
xOE to xQx
Output Disable Time
xOE to xQx
Set-up Time, data before CLK↑
Hold Time, data after CLK↑
Pulse Duration, CLK HIGH or LOW
Output Skew
(2)
2.1
0.6
3.3
—
—
—
—
—
2.2
0.5
3.3
—
—
—
—
—
1.9
0.5
3.3
—
—
—
—
500
ns
ns
ns
ps
1
5.3
—
4.7
1.2
4.3
ns
1
6.2
—
5.9
1
4.8
ns
Parameter
Min.
150
1
Max.
—
5.3
V
CC
= 2.7V
Min.
150
—
Max.
—
4.9
V
CC
= 3.3V ± 0.3V
Min.
150
1
Max.
—
4.2
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.
4
IDT74ALVCH16374
3.3V CMOS 16-BIT EDGE-TRIGGERED D-TYPE LATCH WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
V
IH
V
T
0V
V
OH
V
T
V
OL
V
IH
V
T
0V
ALVC Link
TEST CIRCUITS AND WAVEFORMS
TEST CONDITIONS
Symbol
V
LOAD
V
IH
V
T
V
LZ
V
HZ
C
L
V
CC(1)
= 3.3V±0.3V V
CC(1)
= 2.7V
6
2.7
1.5
300
300
50
V
CC
500
Ω
Pulse
Generator
(1, 2)
SAME PHASE
INPUT TRANSITION
V
CC(2)
= 2.5V±0.2V
2 x Vcc
Vcc
Vcc / 2
150
150
30
Unit
V
V
V
mV
mV
pF
V
LOAD
Open
GND
t
PLH
OUTPUT
t
PLH
OPPOSITE PHASE
INPUT TRANSITION
t
PHL
6
2.7
1.5
300
300
50
t
PHL
Propagation Delay
ENABLE
CONTROL
INPUT
t
PZL
OUTPUT
SWITCH
NORMALLY
CLOSED
LOW
t
PZH
OUTPUT
SWITCH
NORMALLY
OPEN
HIGH
V
LOAD/2
V
T
t
PHZ
V
T
0V
t
PLZ
DISABLE
V
IH
V
T
0V
V
LOAD/2
V
LZ
V
OL
V
OH
V
HZ
0V
ALVC Link
V
IN
D.U.T.
V
OUT
R
T
500
Ω
C
L
ALVC Link
Test Circuit for All Outputs
DEFINITIONS:
C
L
= Load capacitance: includes jig and probe capacitance.
R
T
= Termination resistance: should be equal to Z
OUT
of the Pulse Generator.
NOTES:
1. Pulse Generator for All Pulses: Rate
≤
1.0MHz; t
F
≤
2.5ns; t
R
≤
2.5ns.
2. Pulse Generator for All Pulses: Rate
≤
1.0MHz; t
F
≤
2ns; t
R
≤
2ns.
SWITCH POSITION
Test
Open Drain
Disable Low
Enable Low
Disable High
Enable High
All Other Tests
Switch
V
LOAD
GND
Open
V
IH
INPUT
V
T
0V
V
OH
OUTPUT 1
V
T
V
OL
V
OH
OUTPUT 2
t
PLH2
t
PHL2
ALVC Link
NOTE:
1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
V
IH
DATA
V
T
INPUT
0V
t
SU
t
H
V
IH
TIMING
V
T
INPUT
0V
t
REM
V
IH
ASYNCHRONOUS
V
T
CONTROL
0V
V
IH
SYNCHRONOUS
V
T
CONTROL
t
SU
0V
t
H
ALVC Link
Enable and Disable Times
Set-up, Hold, and Release Times
t
PLH1
t
PHL1
LOW-HIGH-LOW
PULSE
t
W
HIGH-LOW-HIGH
PULSE
V
T
t
SK
(x)
t
SK
(x)
V
T
V
OL
V
T
ALVC Link
Pulse Width
t
SK
(x)
= t
PLH2
-
t
PLH1
or
t
PHL2
-
t
PHL1
Output Skew - t
SK
(
X
)
NOTES:
1. For t
SK
(o) OUTPUT1 and OUTPUT2 are any two outputs.
2. For t
SK
(b) OUTPUT1 and OUTPUT2 are in the same bank.
5
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