IDT74LVC652A
3.3V CMOS OCTAL BUS TRANSCEIVER AND REGISTER
INDUSTRIAL TEMPERATURE RANGE
3.3V CMOS OCTAL BUS
TRANSCEIVER AND REGISTER
WITH 3-STATE OUTPUTS
AND 5 VOLT TOLERANT I/O
• 0.5 MICRON CMOS Technology
• 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
• CMOS power levels (0.4µ W typ. static)
µ
• Rail-to-rail output swing for increased noise margin
• All inputs, outputs, and I/O are 5V tolerant
• Supports hot insertion
• Available in SOIC, SSOP, QSOP, and TSSOP packages
IDT74LVC652A
FEATURES:
DESCRIPTION:
DRIVE FEATURES:
• High Output Drivers: ±24mA
• Reduced system switching noise
APPLICATIONS:
• 5V and 3.3V mixed voltage systems
• Data communication and telecommunication systems
The LVC652A octal bus transceiver/register is built using advanced dual
metal CMOS technology. The device consists of a bus transceiver circuit,
D-type flip-flops, and control circuitry arranged for multiplexed transmission
of data directly from the data bus or from the internal storage registers.
Output-enable (OEAB and
OEBA)
inputs are provided to control the
transceiver functions. Select-control (SAB and SBA) inputs are provided
to select whether real-time or stored data is transferred. The circuitry used
for select control eliminates the typical decoding glitch that occurs in a
multiplexer during the transition between stored and real-time data. A low
input selects real-time data, and a high input selects stored data.
Data on the A or B data bus, or both, is stored in the internal D-type flip-
flops by low-to-high transitions at the appropriate clock (CLKAB or CLKBA)
inputs, regardless of the select- or enable-control pins. When the SAB and
SBA are in the real-time transfer mode, it is possible to store data without
using the internal D-type flip-flops by simultaneously enabling OEAB and
OEBA.
In this configuration, each output reinforces its input.
The LVC652A has been designed with a ±24mA output driver. This
driver is capable of driving a moderate to heavy load while maintaining
speed performance.
Inputs can be driven from either 3.3V or 5V devices. This feature allows
the use of this device as a translator in a mixed 3.3V/5V system environ-
ment.
FUNCTIONAL BLOCK DIAGRAM
OEAB
OEBA
CLKBA
SBA
CLKAB
SAB
3
21
23
22
1
2
B REG
D
C
4
A1
A REG
D
C
20
B1
TO SEVEN OTHER CHANNELS
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
© 1999 Integrated Device Technology, Inc.
APRIL 1999
DSC-4620/2
IDT74LVC652A
3.3V CMOS OCTAL BUS TRANSCEIVER AND REGISTER
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
Description
Max
V
TERM
Terminal Voltage with Respect to GND
Storage Temperature
DC Output Current
Continuous Clamp Current,
V
I
< 0 or V
O
< 0
Continuous Current through each
V
CC
or GND
–0.5 to +6.5
–65 to +150
–50 to +50
–50
±100
Unit
V
°C
mA
mA
mA
CLKAB
SAB
OEAB
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
GND
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
V
CC
CLKBA
SBA
OEBA
B
1
B
2
B
3
B
4
B
5
B
6
B
7
B
8
T
STG
I
OUT
I
IK
I
OK
I
CC
I
SS
NOTE:
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.
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
5.5
6.5
Max.
6
8
8
Unit
pF
pF
pF
NOTE:
1. As applicable to the device type.
SOIC/ SSOP/ QSOP/ TSSOP
TOP VIEW
PIN DESCRIPTION
Pin Names
Ax
Bx
CLKAB, CLKBA
SAB, SBA
OEAB,
OEBA
Description
Data Register A Inputs
Data Register B Outputs
Data Register B Inputs
Data Register A Outputs
Clock Pulse Inputs
Output Data Source Select Inputs
Output Enable Inputs
2
IDT74LVC652A
3.3V CMOS OCTAL BUS TRANSCEIVER AND REGISTER
INDUSTRIAL TEMPERATURE RANGE
BUS
A
BUS
B
BUS
A
BUS
B
OEAB OEBA CLKAB
L
X
L
CLKBA
X
SAB
X
SBA
L
OEAB
H
OEBA CLKAB
H
X
CLKBA
X
SAB
L
SBA
X
REAL-TIME TRANSFER BUS B TO BUS A
REAL-TIME TRANSFER BUS A TO BUS B
BUS
A
BUS
B
BUS
A
BUS
B
OEAB OEBA CLKAB
X
H
↑
L
X
X
L
H
↑
CLKBA
X
↑
↑
SAB
X
X
X
SBA
X
X
X
OEAB OEBA
L
H
CLKAB
H or L
CLKBA
H or L
SAB
H
SBA
H
STORAGE FROM A, B, OR A AND B
TRANSFER STORED DATA TO A AND/OR B
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IDT74LVC652A
3.3V CMOS OCTAL BUS TRANSCEIVER AND REGISTER
INDUSTRIAL TEMPERATURE RANGE
FUNCTION TABLE
(1)
Inputs
OEAB
L
L
X
H
L
L
L
L
H
H
H
OEBA
H
H
H
H
X
L
L
L
H
H
L
CLKAB
H or L
↑
↑
↑
H or L
↑
X
X
X
H or L
H or L
CLKBA
H or L
↑
H or L
↑
↑
↑
X
H or L
X
X
H or L
SAB
X
X
X
X
(2)
X
X
X
X
L
H
H
SBA
X
X
X
X
X
X
(2)
L
H
X
X
H
Output
Output
Input
Output
Input
Input
Unspecified
Output
Output
(2)
Data I/O
Ax
Input
(3)
Bx
Input
Unspecified
(2)
Output
Input
Input
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 OEAB or
OEBA
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.
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IDT74LVC652A
3.3V CMOS OCTAL BUS TRANSCEIVER AND REGISTER
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
Test Conditions
C
L
= 0pF, f = 10Mhz
Typical
84
9.5
Unit
pF
SWITCHING CHARACTERISTICS
(1)
V
CC
= 2.7V
Symbol
f
MAX
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
PZH
t
PZL
t
PHZ
t
PLZ
t
W
t
SU
t
H
t
SK
(o)
Propagation Delay
Ax to Bx or Bx to Ax
Propagation Delay
CLKAB, CLKBA to Ax or Bx
Propagation Delay
SBA or SAB to Ax or Bx
Output Enable Time
OEBA
to Ax
Output Disable Time
OEBA
to Ax
Output Enable Time
OEAB to Bx
Output Disable Time
OEAB to Bx
Pulse Duration CLKAB, CLKBA HIGH or LOW
Set-up Time, data before CLKAB↑, CLKBA↑
Hold Time, data after CLKAB↑, CLKBA↑
Output Skew
(2)
3.3
1.9
1.5
—
—
—
3.3
1.9
1.7
—
—
—
500
ns
ns
ns
ps
—
7.7
1.5
7.4
ns
—
8.6
1.5
7.1
ns
—
8.1
1.5
7.5
ns
—
8.9
1.5
7.4
ns
—
9.6
1.5
8.7
ns
—
8.4
1.5
8
ns
Parameter
Min.
80
—
Max.
—
7.8
V
CC
= 3.3V ± 0.3V
Min.
100
1.5
Max.
—
7.4
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.
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