FAST CMOS 16-BIT BUS TRANSCEIVER/REGISTER (3-STATE)
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
FAST CMOS 16-BIT
BUS TRANSCEIVER/
REGISTER (3-STATE)
FEATURES:
−
−
−
−
−
−
−
−
−
−
0.5 MICRON CMOS Technology
High-speed, low-power CMOS replacement for ABT functions
Typical t
SK
(o) (Output Skew) < 250ps
Low input and output leakage
≤1µ
A (max.)
ESD > 2000V per MIL-STD-883, Method 3015; > 200V using
machine model (C = 200pF, R = 0)
V
CC
= 5V ±10%
High drive outputs (-32mA I
OH
, 64mA I
OL
)
Power off disable outputs permit “live insertion”
Typical V
OLP
(Output Ground Bounce) < 1.0V at V
CC
= 5V, T
A
=
25°C
Available in the following packages:
•
Industrial: SSOP, TSSOP, TVSOP
•
Military: CERPACK
IDT54/74FCT16646T/AT/CT/ET
DESCRIPTION:
The FCT16646T 16-bit registered transceiver is built using advanced
dual metal CMOS technology. These high-speed, low-power devices are
organized as two independent 8-bit bus transceivers with 3-state D-type
registers. The control circuitry is organized for multiplexed transmission of
data between A bus and B bus either directly or from the internal storage
registers. Each 8-bit transceiver/register features direction control (xDIR),
over-riding Output Enable control (xOE) and Select lines (xSAB and xSBA)
to select either real-time data or stored data. Separate clock inputs are
provided for A and B port registers. Data on the A or B data bus, or both,
can be stored in the internal registers by the low-to-high transitions at the
appropriate clock pins. Flow-through organization of signal pins simplifies
layout. All inputs are designed with hysteresis for improved noise margin.
The FCT16646T is ideally suited for driving high-capacitance loads and
low-impedance backplanes. The output buffers are designed with power off
disable capability to allow "live insertion" of boards when used as backplane
drivers.
FUNCTIONAL BLOCK DIAGRAM
1
OE
1
DIR
2
OE
2
DIR
1
CLKBA
1
SBA
1
CLKAB
1
SAB
B R EG
2
CLKBA
2
SBA
2
CLKAB
2
SAB
B R EG
D
C
1
A
1
A R EG
1
B
1
2
A
1
A R EG
D
C
2
B
1
D
C
D
C
TO S EVEN O THER C HAN NELS
TO S EVEN O THER C HAN NELS
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
1
c
1999 Integrated Device Technology, Inc.
JUNE 2000
DSC-5448/-
IDT54/74FCT16646T/AT/CT/ET
FAST CMOS 16-BIT BUS TRANSCEIVER/REGISTER (3-STATE)
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
PIN CONFIGURATION
1DIR
1
CLKAB
1
SAB
ABSOLUTE MAXIMUM RATINGS
(1)
56
55
54
53
52
51
50
49
48
47
46
45
44
1
OE
1
CLKBA
1
SBA
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
Symbol
V
TERM(2)
V
TERM(3)
T
STG
I
OUT
Description
Terminal Voltage with Respect to GND
Terminal Voltage with Respect to GND
Storage Temperature
DC Output Current
Max
–0.5 to +7
–0.5 to V
CC
+0.5
–65 to +150
–60 to +120
Unit
V
V
°C
mA
5v16-link
GND
1
A
1
1
A
2
GND
1
B
1
1
B
2
V
CC
1
A
3
1
A
4
1
A
5
V
CC
1
B
3
1
B
4
1
B
5
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. All device terminals except FCT162XXX Output and I/O terminals.
3. Output and I/O terminals for FCT162XXX.
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
O
C, f = 1.0MHz)
Symbol
C
IN
C
OUT
Parameter
(1)
Input Capacitance
Output Capacitance
Conditions
V
IN
= 0V
V
OUT
= 0V
Typ.
3.5
3.5
Max.
6
8
Unit
pF
pF
5v16-link
SO56-1 43
SO56-2
SO56-3 42
E56-1 41
40
39
38
37
36
35
34
33
32
31
30
29
NOTE:
1. This parameter is measured at characterization but not tested.
GND
2
A
4
2
A
5
2
A
6
GND
2
B
4
2
B
5
2
B
6
PIN DESCRIPTION
Pin Names
xAx
xBx
xCLKAB, xCLKBA
xSAB, xSBA
xDIR, xOE
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
V
CC
2
A
7
2
A
8
V
CC
2
B
7
2
B
8
GND
2
SAB
2
CLKAB
2
DIR
GND
2
SBA
2
CLKBA
2
OE
SSOP/ TSSOP/ TVSOP/ CERPACK
TOP VIEW
2
IDT54/74FCT16646T/AT/CT/ET
FAST CMOS 16-BIT BUS TRANSCEIVER/REGISTER (3-STATE)
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
FUNCTION TABLE
(2)
Inputs
xOE
H
H
L
L
L
L
xDIR
X
X
L
L
H
H
xCLKAB
H or L
↑
X
X
X
H or L
xCLKBA
H or L
↑
X
H or L
X
X
xSAB
X
X
X
X
L
H
xSBA
X
X
L
H
X
X
xAx
Input
Output
Input
Data I/O
(1)
xBx
Input
Input
Output
Isolation
Store A and B Data
Real Time B Data to A Bus
Stored B Data to A Bus
Real Time A Data to B Bus
Stored A Data to B Bus
Operation or Function
NOTES:
1. The data output functions may be enabled or disabled by various signals at the xOE or xDIR inputs. Data input functions are always enabled, i.e. data
at the bus pins will be stored on every LOW-to-HIGH transition on the clock inputs.
2. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
↑
= LOW-to-HIGH Transition
3
IDT54/74FCT16646T/AT/CT/ET
FAST CMOS 16-BIT BUS TRANSCEIVER/REGISTER (3-STATE)
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
BUS
A
BUS
B
BUS
A
BUS
B
x
DIR
x
OE
x
CLKAB
x
CLKBA
x
SAB
x
SBA
x
DIR
x
OE
x
CLKAB
x
CLKBA
x
SAB
x
SBA
L
L
X
X
X
L
H
L
X
X
L
X
REAL-TIME TRANSFER
BUS B TO A
REAL-TIME TRANSFER
BUS A TO B
BUS
A
BUS
B
BUS
A
BUS
B
x
DIR
x
OE
x
CLKAB
x
CLKBA
x
SAB
x
SBA
x
DIR
(1)
x
OE
x
CLKAB
x
CLKBA
x
SAB
x
SBA
H
L
X
L
L
H
↑
X
↑
↑
X
X
X
X
X
X
L
H
L
L
X
H or L
H or L
X
X
H
H
X
X
↑
STORAGE FROM
A AND/OR B
TRANSFER STORED
DATA TO A AND/OR B
NOTE:
1. Cannot transfer data to A bus and B bus simultaniously.
4
IDT54/74FCT16646T/AT/CT/ET
FAST CMOS 16-BIT BUS TRANSCEIVER/REGISTER (3-STATE)
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: T
A
= -40°C to +85°C, V
CC
= 5.0V ±10%; Military: T
A
= -55°C to +125°C, V
CC
= 5.0V ±10%
Symbol
V
IH
V
IL
I
IH
I
IL
I
OZH
I
OZL
V
IK
I
OS
V
H
I
CCL
I
CCH
I
CCZ
Parameter
Input HIGH Level
Input LOW Level
Input HIGH Current (Input pins)
(5)
Input HIGH Current (I/O pins)
(5)
Input LOW Current (Input pins)
(5)
Input LOW Current (I/O pins)
(5)
High Impedance Output Current
(3-State Output pins)
(5)
Clamp Diode Voltage
Short Circuit Current
Input Hysteresis
Quiescent Power Supply Current
V
CC
= Max.
V
IN
= GND or V
CC
V
CC
= Min., I
IN
= –18mA
V
CC
= Max., V
O
= GND
(3)
—
V
CC
= Max.
V
O
= 2.7V
V
O
= 0.5V
V
I
= GND
Test Conditions
(1)
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
CC
= Max.
V
I
= V
CC
Min.
2
—
—
—
—
—
—
—
—
–80
—
—
Typ.
(2)
—
—
—
—
—
—
—
—
–0.7
–140
100
5
Max.
—
0.8
±1
±1
±1
±1
±1
±1
–1.2
–250
—
500
V
mA
mV
µA
µA
Unit
V
V
µA
5v16-link
OUTPUT DRIVE CHARACTERISTICS
Symbol
I
O
V
OH
Parameter
Output Drive Current
Output HIGH Voltage
Test Conditions
(1)
V
CC
= Max., V
O
= 2.5V
(3)
V
CC
= Min.
V
IN
=
V
IH
or V
IL
I
OH
= –3mA
I
OH
= –12mA MIL
I
OH
= –15mA IND
I
OH
= –24mA MIL
I
OH
= –32mA IND
(4)
V
OL
I
OFF
Output LOW Voltage
Input/Output Power Off Leakage
(5)
V
CC
= Min.
V
IN
=
V
IH
or V
IL
V
CC
= 0V, V
IN
or V
O
≤
4.5V
I
OL
= 48mA MIL
I
OL
= 64mA IND
—
—
±1
µA
—
0.2
0.55
V
2
3
—
V
Min.
–50
2.5
2.4
Typ.
(2)
—
3.5
3.5
Max.
–180
—
—
Unit
mA
V
V
NOTES:
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at V
CC
= 5.0V, +25°C ambient.
3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second.
4. Duration of the condition can not exceed one second.
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