Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
AUGUST 1996
1996 Integrated Device Technology, Inc.
5.10
DSC-2547/8
1
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
IDT54/74FCT16501AT/CT/ET
IDT54/74FCT162501AT/CT/ET
IDT54/74FCT162H501AT/CT/ET
FAST CMOS
18-BIT REGISTERED
TRANSCEIVER
CMOS technology. These high-speed, low-power 18-bit reg-
istered bus transceivers combine D-type latches and D-type
flip-flops to allow data flow in transparent, latched and clocked
modes. Data flow in each direction is controlled by output-
enable (OEAB and
OEBA
), latch enable (LEAB and LEBA)
and clock (CLKAB and CLKBA) inputs. For A-to-B data flow,
the device operates in transparent mode when LEAB is HIGH.
When LEAB is LOW, the A data is latched if CLKAB is held at
a HIGH or LOW logic level. If LEAB is LOW, the A bus data
is stored in the latch/flip-flop on the LOW-to-HIGH transition of
CLKAB. OEAB is the output enable for the B port. Data flow
from the B port to the A port is similar but requires using
OEBA
,
LEBA and CLKBA. Flow-through organization of signal pins
simplifies layout. All inputs are designed with hysteresis for
improved noise margin.
The FCT16501AT/CT/ET are 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.
The FCT162501AT/CT/ET have balanced output drive
with current limiting resistors. This offers low ground bounce,
minimal undershoot, and controlled output fall timesreducing
the need for external series terminating resistors. The
FCT162501AT/CT/ET are plug-in replacements for the
FCT16501AT/CT/ET and ABT16501 for on-board bus inter-
face applications.
The FCT162H501AT/CT/ET have "Bus Hold" which re-
tains the input's last state whenever the input goes to high
impedance. This prevents "floating" inputs and eliminates the
need for pull-up/down resistors.
DESCRIPTION:
The FCT16501AT/CT/ET and FCT162501AT/CT/ET 18-
bit registered transceivers are built using advanced dual metal
2547 drw 01
OEBA
CLKBA
LEBA
OEAB
CLKAB
LEAB
B
1
A
1
C
C
D
D
D
C
D
C
TO 17 OTHER CHANNELS
FUNCTIONAL BLOCK DIAGRAM
FEATURES:
Common 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
1
A (max.)
ESD > 2000V per MIL-STD-883, Method 3015;
> 200V using machine model (C = 200pF, R = 0)
Packages include 25 mil pitch SSOP, 19.6 mil pitch
TSSOP, 15.7 mil pitch TVSOP and 25 mil pitch Cerpack
Extended commercial range of -40
C to +85
C
Features for FCT16501AT/CT/ET:
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
Features for FCT162501AT/CT/ET:
Balanced Output Drivers:
24mA (commercial),
16mA (military)
Reduced system switching noise
Typical V
OLP
(Output Ground Bounce) < 0.6V at
V
CC
= 5V,T
A
= 25
C
Features for FCT162H501AT/CT/ET:
Bus Hold retains last active bus state during 3-state
Eliminates the need for external pull up resistors
5.10
2
IDT54/74FCT16501AT/CT/ET, 162501AT/CT/ET, 162H501AT/CT/ET
FAST CMOS 18-BIT REGISTERED TRANSCEIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN CONFIGURATIONS
OEAB
LEAB
A
1
GND
A
2
A
3
V
CC
A
4
A
5
GND
A
6
A
7
A
8
A
9
GND
A
10
A
11
V
CC
A
12
A
18
A
14
A
13
A
16
GND
A
17
LEBA
A
15
GND
B
2
B
3
GND
B
4
B
5
V
CC
B
6
B
7
B
1
B
8
B
9
B
10
B
11
GND
B
12
B
13
V
CC
B
14
GND
CLKAB
B
16
B
15
B
17
GND
B
18
CLKBA
GND
OEBA
47
37
38
39
40
41
42
43
44
45
46
33
34
35
36
56
55
49
50
51
52
53
54
48
1
2
3
4
5
6
7
8
9
10
12
13
14
15
16
17
18
19
20
11
21
22
23
24
29
30
31
32
25
26
27
28
2547 drw 03
CERPACK
TOP VIEW
E56-1
GND
B
2
B
3
GND
B
4
B
5
V
CC
B
6
B
7
B
1
B
8
B
9
B
10
B
11
GND
B
12
B
13
V
CC
B
14
GND
CLKAB
B
16
B
15
B
17
GND
B
18
CLKBA
GND
OEAB
LEAB
A
1
GND
A
2
A
3
V
CC
A
4
A
5
GND
A
6
A
7
A
8
A
9
GND
A
10
A
11
V
CC
A
12
A
18
A
14
A
13
A
16
GND
A
17
LEBA
A
15
OEBA
2547 drw 02
47
37
38
39
40
41
42
43
44
45
46
33
34
35
36
56
55
49
50
51
52
53
54
48
1
2
3
4
5
6
7
8
9
10
12
13
14
15
16
17
18
19
20
11
21
22
23
24
SSOP/
TSSOP/TVSOP
TOP VIEW
SO56-1
SO56-2
SO56-3
29
30
31
32
25
26
27
28
IDT54/74FCT16501AT/CT/ET, 162501AT/CT/ET, 162H501AT/CT/ET
FAST CMOS 18-BIT REGISTERED TRANSCEIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
5.10
3
FUNCTION TABLE
(1,4)
Inputs
Outputs
OEAB
LEAB
CLKAB
Ax
Bx
L
X
X
X
Z
H
H
X
L
L
H
H
X
H
H
H
L
L
L
H
L
H
H
H
L
L
X
B
(2)
H
L
H
X
B
(3)
NOTES:
2547 tbl 02
1. A-to-B data flow is shown. B-to-A data flow is similar but uses
OEBA
,
LEBA, and CLKBA.
2. Output level before the indicated steady-state input conditions were
established.
3. Output level before the indicated steady-state input conditions were
established, provided that CLKAB was HIGH before LEAB went LOW.
4. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
Z = High-impedance
=
LOW-to-HIGH Transition
CAPACITANCE
(T
A
= +25
C, f = 1.0MHz)
PIN DESCRIPTION
Pin Names
Description
OEAB
A-to-B Output Enable Input
OEBA
B-to-A Output Enable Input (Active LOW)
LEAB
A-to-B Latch Enable Input
LEBA
B-to-A Latch Enable Input
CLKAB
A-to-B Clock Input
CLKBA
B-to-A Clock Input
Ax
A-to-B Data Inputs or B-to-A 3-State Outputs
(1)
Bx
B-to-A Data Inputs or A-to-B 3-State Outputs
(1)
2547 tbl 01
Symbol
Parameter
(1)
Conditions
Typ.
Max.
Unit
C
IN
Input
Capacitance
V
IN
= 0V
3.5
6.0
pF
C
I/O
I/O
Capacitance
V
OUT
= 0V
3.5
8.0
pF
NOTE:
1. This parameter is measured at characterization but not tested.
2547 lnk 04
ABSOLUTE MAXIMUM RATINGS
(1)
NOTE:
1. On FCT16xH501T these pins have "Bus Hold". All other pins are standard
inputs, outputs or I/Os.
Symbol
Description
Max.
Unit
V
TERM(2)
Terminal Voltage with Respect to
GND
0.5 to +7.0
V
V
TERM(3)
Terminal Voltage with Respect to
GND
0.5 to
V
CC
+0.5
V
T
STG
Storage Temperature
65 to +150
C
I
OUT
DC Output Current
60 to +120 mA
2547 lnk 03
NOTES:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RAT-
INGS 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 FCT162XXXT Output and I/O terminals.
3. Output and I/O terminals for FCT162XXXT.
5.10
4
IDT54/74FCT16501AT/CT/ET, 162501AT/CT/ET, 162H501AT/CT/ET
FAST CMOS 18-BIT REGISTERED TRANSCEIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE (STANDARD PARTS)
Following Conditions Apply Unless Otherwise Specified:
Commercial: 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
Parameter
Test Conditions
(1)
Min.
Typ.
(2)
Max.
Unit
V
IH
Input HIGH Level
Guaranteed Logic HIGH Level
2.0
--
--
V
V
IL
Input LOW Level
Guaranteed Logic LOW Level
--
--
0.8
V
I
I H
Input HIGH Current (Input pins)
(5)
V
CC
= Max.
V
I
= V
CC
--
--
1
A
Input HIGH Current (I/O pins)
(5)
--
--
1
I
I L
Input LOW Current (Input pins)
(5)
V
I
= GND
--
--
1
Input LOW Current (I/O pins)
(5)
--
--
1
I
OZH
High Impedance Output Current
V
CC
= Max.
V
O
= 2.7V
--
--
1
A
I
OZL
(3-State Output pins)
(5)
V
O
= 0.5V
--
--
1
V
IK
Clamp Diode Voltage
V
CC
= Min., I
IN
= 18mA
--
0.7
1.2
V
I
OS
Short Circuit Current
V
CC
= Max., V
O
= GND
(3)
80
140
225
mA
V
H
Input Hysteresis
--
--
100
--
mV
I
CCL
I
CCH
I
CCZ
Quiescent Power Supply Current
V
CC
= Max., V
IN
= GND or V
CC
--
5
500
A
2547 lnk 05
OUTPUT DRIVE CHARACTERISTICS FOR FCT16501T
Symbol
Parameter
Test Conditions
(1)
Min.
Typ.
(2)
Max.
Unit
I
O
Output Drive Current
V
CC
= Max., V
O
= 2.5V
(3)
50
--
180
mA
V
OH
Output HIGH Voltage
V
CC
= Min.
I
OH
= 3mA
2.5
3.5
--
V
V
IN
= V
IH
or V
IL
I
OH
= 12mA MIL.
I
OH
= 15mA COM'L.
2.4
3.5
--
V
I
OH
= 24mA MIL.
I
OH
= 32mA COM'L.
(4)
2.0
3.0
--
V
V
OL
Output LOW Voltage
V
CC
= Min.
V
IN
= V
IH
or V
IL
I
OL
= 48mA MIL.
I
OL
= 64mA COM'L.
--
0.2
0.55
V
I
OFF
Input/Output Power Off Leakage
(5)
V
CC
= 0V, V
IN
or V
O
4.5V
--
--
1
A
OUTPUT DRIVE CHARACTERISTICS FOR FCT162501T
2547 lnk 07
2547 lnk 06
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 Vcc = 5.0V, +25
C ambient.
3. Not more than one output should be tested at one time. Duration of the test should not exceed one second.
4. Duration of the condition can not exceed one second.
5. The test limit for this parameter is
5
A at T
A
= 55
C.
Symbol
Parameter
Test Conditions
(1)
Min.
Typ.
(2)
Max.
Unit
I
ODL
Output LOW Current
V
CC
= 5V, V
IN
= V
IH
or
V
IL,
V
OUT
= 1.5V
(3)
60
115
200
mA
I
ODH
Output HIGH Current
V
CC
= 5V, V
IN
= V
IH
or V
IL,
V
OUT
= 1.5V
(3)
60
115
200
mA
V
OH
Output HIGH Voltage
V
CC
= Min.
V
IN
= V
IH
or V
IL
I
OH
= 16mA MIL.
I
OH
= 24mA COM'L.
2.4
3.3
--
V
V
OL
Output LOW Voltage
V
CC
= Min.
V
IN
= V
IH
or V
IL
I
OL
= 16mA MIL.
I
OL
= 24mA COM'L.
--
0.3
0.55
V
IDT54/74FCT16501AT/CT/ET, 162501AT/CT/ET, 162H501AT/CT/ET
FAST CMOS 18-BIT REGISTERED TRANSCEIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
5.10
5
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE (BUS HOLD)
Following Conditions Apply Unless Otherwise Specified:
Commercial: 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
Parameter
Test Conditions
(1)
Min.
Typ.
(2)
Max.
Unit
V
IH
Input HIGH Level
Guaranteed Logic HIGH Level
2.0
--
--
V
V
IL
Input LOW Level
Guaranteed Logic LOW Level
--
--
0.8
V
I
I H
Input
Standard Input
(5)
V
CC
= Max.
V
I
= V
CC
--
--
1
A
HIGH
Standard I/O
(5)
--
--
1
Current
(4)
Bus-Hold Input
--
--
100
Bus-Hold I/O
--
--
100
I
I L
Input
Standard Input
(5)
V
I
= GND
--
--
1
LOW
Standard I/O
(5)
--
--
1
Current
(4)
Bus-Hold Input
--
--
100
Bus-Hold I/O
--
--
100
I
BHH
Bus Hold
Bus-Hold Input
V
CC
= Min.
V
I
= 2.0V
50
--
--
A
I
BHL
Sustain
Current
(4)
V
I
= 0.8V
+50
--
--
I
OZH
High Impedance Output Current
V
CC
= Max.
V
O
= 2.7V
--
--
1
A
I
OZL
(3-State Output pins)
(5,6)
V
O
= 0.5V
--
--
1
V
IK
Clamp Diode Voltage
V
CC
= Min., I
IN
= 18mA
--
0.7
1.2
V
I
OS
Short Circuit Current
V
CC
= Max., V
O
= GND
(3)
80
140
225
mA
V
H
Input Hysteresis
--
--
100
--
mV
I
CCL
I
CCH
I
CCZ
Quiescent Power Supply Current
V
CC
= Max., V
IN
= GND or V
CC
--
5
500
A
2547 lnk 08
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 Vcc = 5.0V, +25
C ambient.
3. Not more than one output should be tested at one time. Duration of the test should not exceed one second.
4. Pins with Bus Hold are identified in the pin description.
5. The test limit for this parameter is
5
A at T
A
= 55
C.
6. Does not include Bus Hold I/O pins.
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