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.
GND
1
A
6
1
A
7
1
A
8
2
A
1
2
A
2
2
A
3
GND
1
B
6
1
B
7
1
B
8
2
B
1
2
B
2
2
B
3
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.
4.5
6.5
6.5
Max.
6
8
8
Unit
pF
pF
pF
NOTE:
1. As applicable to the device type.
GND
2
A
4
2
A
5
2
A
6
GND
2
B
4
2
B
5
2
B
6
V
CC
2
A
7
2
A
8
V
CC
2
B
7
2
B
8
PIN DESCRIPTION
Pin Names
xAx
Description
Data Register A Inputs
Data Register B Outputs
xBx
xCLKAB, xCLKBA
xSAB, xSBA
xOEAB, xOEBA
Data Register B Inputs
Data Register A Outputs
Clock Pulse Inputs
Output Data Source Select Inputs
Output Enable Inputs
GND
2
SAB
2
CLKAB
2
OEAB
GND
2
SBA
2
CLKBA
2
OEBA
SSOP/ TSSOP/ TVSOP
TOP VIEW
2
IDT74LVC16652A
3.3V CMOS 16-BIT BUS REGISTERED TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
FUNCTION TABLE
(1,2)
Inputs
xOEAB
L
L
X
H
L
L
L
L
H
H
H
xOEBA
H
H
H
H
X
L
L
L
H
H
L
xCLKAB
H or L
↑
↑
↑
H or L
↑
X
X
X
H or L
H or L
xCLKBA
H or L
↑
H or L
↑
↑
↑
X
H or L
X
X
H or L
xSAB
X
X
X
X
(2)
X
X
X
X
L
H
H
xSBA
X
X
X
X
X
X
(2)
L
H
X
X
H
Output
Output
Input
Output
Input
Input
Unspecified
(3)
Output
Output
Unspecified
Output
Input
Input
Input
(3)
Data I/O
xAx
Input
(3)
xBx
Input
Operation or Function
Isolation
Store A and B data
Store A, Hold B
Store A in both registers
Store B, Hold A
Store B in both registers
Real time B data to A bus
Store B data to A bus
Real time A data to B bus
Store A data to B bus
Store A data to B bus and
Store B data to A bus
NOTES:
1. H = HIGH Voltage Level
X = Don’t Care
L = LOW Voltage Level
↑
= LOW-to-HIGH transition
2. Select Control = L: clocks can occur simultaneously.
Select Control = H: clocks can be staggered to load both registers.
3. The data output functions may be enabled or disabled by various signals at the xOEAB or xOEBA inputs. Data input functions are always enabled, i.e. data at the bus pins
will be stored on every LOW-to-HIGH transition of the clock inputs.
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
I
OFF
V
IK
V
H
I
CCL
I
CCH
I
CCZ
∆I
CC
High Impedance Output Current
(3-State Output pins)
Input/Output Power Off Leakage
Clamp Diode Voltage
Input Hysteresis
Quiescent Power Supply Current
V
CC
= 0V, V
IN
or V
O
≤
5.5V
V
CC
= 2.3V, I
IN
= –18mA
V
CC
= 3.3V
V
CC
= 3.6V
V
IN
= GND or V
CC
—
—
—
—
—
—
—
–0.7
100
—
—
—
±50
–1.2
—
10
10
500
µA
V
mV
µA
V
CC
= 3.6V
V
O
= 0 to 5.5V
—
—
±10
µA
Parameter
Input HIGH Voltage Level
Input LOW Voltage Level
Input Leakage Current
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
I
= 0 to 5.5V
Test Conditions
Min.
1.7
2
—
—
—
Typ.
(1)
—
—
—
—
—
Max.
—
—
0.7
0.8
±5
µA
V
Unit
V
Quiescent Power Supply Current
Variation
3.6
≤
V
IN
≤
5.5V
(2)
One input at V
CC
- 0.6V, other inputs at V
CC
or GND
µA
NOTES:
1. Typical values are at V
CC
= 3.3V, +25°C ambient.
2. This applies in the disabled state only.
3
IDT74LVC16652A
3.3V CMOS 16-BIT BUS REGISTERED TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
BUS
A
BUS
B
BUS
A
BUS
B
xOEAB xOEBA xCLKAB
L
X
L
xCLKBA
X
xSAB
X
xSBA
L
xOEAB xOEBA xCLKAB
H
X
H
xCLKBA
X
xSAB
L
xSBA
X
REAL-TIME TRANSFER
BUS B TO A
REAL-TIME TRANSFER
BUS A TO B
BUS
A
BUS
B
BUS
A
BUS
B
xOEAB xOEBA xCLKAB
H
X
↑
X
L
X
H
L
↑
xCLKBA
X
↑
↑
xSAB
X
X
X
xSBA
X
X
X
xOEAB xOEBA xCLKAB
L
H or L
H
xCLKBA
H or L
xSAB
H
xSBA
H
STORAGE FROM
A, B, OR A AND B
TRANSFER STORED
DATA TO A AND/OR B
4
IDT74LVC16652A
3.3V CMOS 16-BIT BUS REGISTERED TRANSCEIVER
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
2.2
—
—
—
—
—
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, V
CC
= 3.3V ± 0.3V, T
A
= 25°C
Symbol
C
PD
C
PD
Parameter
Power Dissipation Capacitance per Transceiver Outputs enabled
Power Dissipation Capacitance per Transceiver Outputs disabled
白光LED光衰原因之荧光粉性能的衰退 到目前，白光 LED、尤其是小功率白光 LED 的发光性能快速衰退已越来越为人们所认识。其实，盲目地夸大宣传，只能将 LED 行业引向歧途，不正视白光 LED 存在的问题，只能延缓白光 LED 应用的发展。只有正视问题、研究问题、尽早解决问题，白光 LED 才能健康、快速发展。 白光 LED 当前面临的一个主要问题就寿命问题。由于白光 LED 的价格尚很...[详细]
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