IDT74ALVCH162821
3.3V CMOS 20-BIT BUS-INTERFACE FLIP-FLOP
EXTENDED COMMERCIAL TEMPERATURE RANGE
3.3V CMOS 20-BIT
BUS-INTERFACE FLIP-
FLOP WITH 3-STATE OUT-
PUTS 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 ALVCH162821:
– Balanced Output Drivers: ±12mA
– Low switching noise
–
–
–
IDT74ALVCH162821
technology. The ALVCH162821 device can be used as two 10-bit flip-
flops or one 20-bit flip-flop. The 20-bit flip-flops are edge-triggered D-
type flip-flops. On the positive transition of the clock (CLK) input, the
device provides true data at the Q outputs.
A buffered output-enable (OE) input can be used to place the ten
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
increased drive provide the capability to drive bus lines without the need
for interface or pullup components. OE input does not affect the internal
operation of the flip-flops. Old data can be retained or new data can be
entered while the outputs are in the high-impedance state.
The ALVCH162821 has series resistors in the device output structure
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 ALVCH162821 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.
APPLICATIONS:
•
3.3V High Speed Systems
•
3.3V and lower voltage computing systems
DESCRIPTION:
This 20-bit bus-interface flip-flop is built using advanced CMOS
FUNCTIONAL BLOCK DIAGRAM
1
OE
1
2
OE
28
1
C LK
56
2
C LK
29
C
1
1
D
1
55
1
D
2
C
1
1
Q
1
2
D
1
42
1
D
15
2
Q
1
One of 10
C hannels
One of 10
C hannels
TO 9 OTHER C HA NN ELS
TO 9 OTH ER C HANN ELS
EXTENDED COMMERCIAL TEMPERATURE RANGE
1
c
1999 Integrated Device Technology, Inc.
AUGUST 1999
DSC-4538/-
IDT74ALVCH162821
3.3V CMOS 20-BIT BUS-INTERFACE FLIP-FLOP
EXTENDED COMMERCIAL TEMPERATURE RANGE
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATING
Symbol
V
TERM(2)
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
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
25
26
27
28
56
55
54
53
52
51
50
49
48
47
46
45
SO56-1 44
SO56-2
43
SO56-3
42
41
40
39
38
37
36
35
34
33
32
31
30
29
1
CLK
1
D
1
1
D
2
V
TERM(3)
T
STG
I
OUT
I
IK
I
OK
I
CC
I
SS
GND
1
Q
3
1
Q
4
GND
1
D
3
1
D
4
V
CC
1
Q
5
1
Q
6
1
Q
7
V
CC
1
D
5
1
D
6
1
D
7
GND
1
Q
8
1
Q
9
1
Q
10
2
Q
1
2
Q
2
2
Q
3
GND
1
D
8
1
D
9
1
D
10
2
D
1
2
D
2
2
D
3
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
2
Q
4
2
Q
5
2
Q
6
GND
2
D
4
2
D
5
2
D
6
V
CC
2
Q
7
2
Q
8
V
CC
2
D
7
2
D
8
NOTE:
1. As applicable to the device type.
GND
2
Q
9
2
Q
10
2
OE
GND
2
D
9
2
D
10
2
CLK
FUNCTION TABLE
xOE
L
L
L
H
Inputs
xCLK
↑
↑
H or L
X
(each 10-bit flip-flop)
Output
xQx
H
L
Q
0
Z
(1)
xDx
H
L
X
X
SSOP/
TSSOP/TVSOP
TOP VIEW
PIN DESCRIPTION
Pin Names
xDx
xCLK
xQx
xOE
Data Inputs
(1)
Description
Clock Inputs
3–State Outputs
3–State Output Enable Inputs (Active Low)
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Z = High-Impedance
-
= LOW-to-HIGH Transition
Q0 = Level of Q 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
IDT74ALVCH162821
3.3V CMOS 20-BIT BUS-INTERFACE FLIP-FLOP
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
IDT74ALVCH162821
3.3V CMOS 20-BIT BUS-INTERFACE FLIP-FLOP
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
= – 4mA
I
OH
= – 6mA
V
CC
= 2.7V
V
CC
= 3.0V
V
OL
Output LOW Voltage
V
CC
= 2.3V to 3.6V
V
CC
= 2.3V
V
CC
= 2.7V
V
CC
= 3.0V
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
NEW16link
Unit
V
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 per flip-flop
Outputs enabled
Power Dissipation Capacitance per flip-flop
Outputs disabled
Test Conditions
C
L
= 0pF, f = 10Mhz
Typical
40
26
V
CC
= 3.3V ± 0.3V
Typical
45
28
Unit
pF
pF
SWITCHING CHARACTERISTICS
Symbol
f
MAX
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
W
t
SU
t
H
t
SK(O)
Parameter
Propagation Delay
xCLK to xQx
Output Enable Time
xOE to xQx
Output Disable Time
xOE to xQx
Pulse Duration, xCLK HIGH or LOW
Setup Time, data before xCLK↑
Hold Time, data after xCLK↑
Output Skew
(2)
Min.
150
1
1
1
3.3
4.7
0
(1)
V
CC
= 2.5V ± 0.2V
Max.
6.3
7
6.2
3.3
4.1
0
V
CC
= 2.7V
Min.
150
Max.
5.8
6.6
5.5
V
CC
= 3.3V ± 0.3V
Min.
150
1
1
1
3.3
3.6
0
500
Max.
5
5.5
5.1
Unit
MHz
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.
4
IDT74ALVCH162821
3.3V CMOS 20-BIT BUS-INTERFACE FLIP-FLOP
EXTENDED COMMERCIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS:
TEST CONDITIONS
PROPAGATION DELAY
Symbol
V
LOAD
V
IH
V
T
V
LZ
V
HZ
C
L
V
CC
(1)
= 3.3V±0.3V
6
2.7
1.5
300
300
50
V
CC
(1)
= 2.7V
6
2.7
1.5
300
300
50
V
CC
(2)
= 2.5V±0.2V
2 x Vcc
Vcc
Vcc / 2
150
150
30
Unit
V
V
V
mV
mV
pF
NEW16link
SAM E PHAS E
INPUT TRANSITION
t
PLH
OUTPUT
t
PLH
OPPOSITE PHASE
INPUT TRANSITION
t
PH L
t
PH L
V
IH
V
T
0V
V
OH
V
T
V
OL
V
IH
V
T
0V
ALV C Link
TEST CIRCUITS FOR ALL OUTPUTS
V
CC
500
Ω
Pulse
Generator
(1, 2)
ENABLE AND DISABLE TIMES
ENABLE
CONTROL
INPUT
t
PZL
OUTPUT
SW ITCH
NORM ALLY
CLOSE D
LOW
t
PZH
OUTPUT
SW ITCH
NORM ALLY
OPEN
HIGH
V
LOAD /2
V
T
t
PH Z
V
T
0V
t
PLZ
DISABLE
V
IH
V
T
0V
V
LOAD /2
V
LZ
V
OL
V
OH
V
HZ
0V
V
LOAD
Open
GND
V
IN
D.U.T.
V
OU T
R
T
500
Ω
C
L
ALV C Link
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
≤
10MHz; t
F
≤
2.5ns; t
R
≤
2.5ns.
2. Pulse Generator for All Pulses: Rate
≤
10MHz; t
F
≤
2ns; t
R
≤
2ns.
ALVC Link
NOTE:
1. Diagram shown for input Control Enable-LOW and input Control
Disable-HIGH.
SET-UP, HOLD, AND RELEASE TIMES
DATA
INPUT
t
S U
t
H
V
IH
V
T
0V
V
IH
V
T
0V
V
IH
V
T
0V
V
IH
V
T
0V
ALV C Link
SWITCH POSITION
Test
Open Drain
Disable Low
Enable Low
Disable High
Enable High
All Other tests
Switch
V
LOAD
TIMING
INPUT
ASYNCHRONOUS
CONTROL
SYNCHRONOUS
CONTROL
NEW16link
t
R EM
GND
Open
t
S U
t
H
OUTPUT SKEW -
INPUT
TSK
(x)
t
PH L1
V
IH
V
T
0V
V
OH
t
PLH1
PULSE WIDTH
LOW -HIGH-LOW
PULSE
t
W
HIGH-LOW -HIGH
PULSE
V
T
ALV C Link
OUTPUT 1
t
SK
(x)
t
SK
(x)
V
T
V
OL
V
OH
V
T
OUTPUT 2
t
PLH2
t
PH L2
V
T
V
OL
t
SK
(x)
= t
PLH2
-
t
P LH1
or
t
PH L2
-
t
P HL1
ALV C Link
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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