MILITARY AND COMMERCIAL TEMPERATURE RANGES
AUGUST 1996
©
1996 Integrated Device Technology, Inc.
5.3
DSC-2545/9
1
Integrated Device Technology, Inc.
The 16-bit transceivers are built using advanced dual metal
CMOS technology. These high-speed, low-power transceiv-
ers are ideal for synchronous communication between two
busses (A and B). The Direction and Output Enable controls
operate these devices as either two independent 8-bit trans-
ceivers or one 16-bit transceiver. The direction control pin
(xDIR) controls the direction of data flow. The output enable
pin (x
OE
) overrides the direction control and disables both
ports. All inputs are designed with hysteresis for improved
noise margin.
The FCT16245T are ideally suited for driving high-capaci-
tance loads and low-impedance backplanes. The output buff-
ers are designed with power off disable capability to allow "live
insertion" of boards when used as backplane drivers.
The FCT162245T have balanced output drive with current
limiting resistors. This offers low ground bounce, minimal
undershoot, and controlled output fall times– reducing the
need for external series terminating resistors. The
FCT162245T are plug-in replacements for the FCT16245T
and ABT16245 for on-board interface applications.
The FCT166245T are suited for very low noise, point-to-
point driving where there is a single receiver, or a light lumped
DESCRIPTION:
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
FUNCTIONAL BLOCK DIAGRAM
1
DIR
1
OE
1
A
1
1
A
2
1
A
3
1
A
4
1
A
5
1
A
6
1
A
7
1
A
8
1
B
1
1
B
2
1
B
3
1
B
4
1
B
5
1
B
6
1
B
7
1
B
8
2545 drw 02
2
DIR
2
OE
2
A
1
2
A
2
2
A
3
2
A
4
2
A
5
2
A
6
2
A
7
2
A
8
2
B
1
2
B
2
2
B
3
2
B
4
2
B
5
2
B
6
2
B
7
2
B
8
2545 drw 01
IDT54/74FCT16245T/AT/CT/ET
IDT54/74FCT162245T/AT/CT/ET
IDT54/74FCT166245T/AT/CT
IDT54/74FCT162H245T/AT/CT/ET
FAST CMOS 16-BIT
BIDIRECTIONAL
TRANSCEIVERS
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
µ
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 FCT16245T/AT/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 FCT162245T/AT/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
5.3
2
IDT54/74FCT16245T/AT/CT/ET, 162245T/AT/CT/ET, IDT54/74FCT166245T/AT/CT, IDT54/74FCT162H245T/AT/CT/ET
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
1
DIR
1
B
1
GND
1
B
3
V
CC
GND
2
B
2
GND
V
CC
GND
1
B
2
1
B
4
1
B
5
1
B
6
1
B
7
1
B
8
2
B
1
2
B
3
2
B
4
2
B
5
2
B
7
2
B
8
2
B
6
2
DIR
1
A
1
1
A
2
GND
1
A
3
1
A
4
V
CC
1
A
5
1
A
6
1
A
7
1
A
8
2
A
1
2
A
2
2
A
3
2
A
4
V
CC
2
A
5
2
A
7
2
A
8
2
A
6
GND
GND
GND
2
OE
1
OE
39
29
30
31
32
33
34
35
36
37
38
25
26
27
28
48
47
41
42
43
44
45
46
40
1
2
3
4
5
6
7
8
9
10
12
13
14
15
16
17
18
19
20
11
21
22
23
24
2545 drw 04
CERPACK
TOP VIEW
E48-1
FEATURES: (Cont'd.)
DESCRIPTION: (Cont'd.)
• Features for FCT166245T/AT/CT:
–
Light Drive A Port:
±
8mA (commercial),
±
6mA (military)
–
High Drive B Port:
+64mA, –32mA (commercial),
+48mA, –24mA (military)
–
Minimal system switching noise
–
Typical V
OLP
(Output Ground Bounce) < 0.25V at
V
CC
= 5V,T
A
= 25
°
C (A Port Switching)
• Features for FCT162H245T/AT/CT/ET:
–
Bus Hold retains last active bus state during 3-state
–
Eliminates the need for external pull up resistors
load (<100pF). The buffers are designed to limit the output
current to levels which will avoid noise and ringing on the
signal lines without using external series terminating resis-
tors. These parts have a
±
8mA driver on the "A" Port and a
+64/–32mA driver on the "B" Port, making them ideal for
interfacing noisy system busses to noise sensitive interfaces.
The FCT162H245T have "Bus Hold" which retains 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.
PIN CONFIGURATIONS
1
DIR
1
B
1
GND
1
B
3
V
CC
GND
2
B
2
GND
V
CC
GND
1
B
2
1
B
4
1
B
5
1
B
6
1
B
7
1
B
8
2
B
1
2
B
3
2
B
4
2
B
5
2
B
7
2
B
8
2
B
6
2
DIR
1
A
1
1
A
2
GND
1
A
3
1
A
4
V
CC
1
A
5
1
A
6
1
A
7
1
A
8
2
A
1
2
A
2
2
A
3
2
A
4
V
CC
2
A
5
2
A
7
2
A
8
2
A
6
GND
GND
GND
2
OE
1
OE
2545 drw 03
39
29
30
31
32
33
34
35
36
37
38
25
26
27
28
48
47
41
42
43
44
45
46
40
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
SO48-1
SO48-2
SO48-3
5.3
3
IDT54/74FCT16245T/AT/CT/ET, 162245T/AT/CT/ET, IDT54/74FCT166245T/AT/CT, IDT54/74FCT162H245T/AT/CT/ET
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
NOTE:
1. This parameter is measured at characterization but not tested.
PIN DESCRIPTION
ABSOLUTE MAXIMUM RATINGS
(1)
2545 tbl 02
CAPACITANCE
(T
A
= +25
°
C, f = 1.0MHz)
2545 lnk 04
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
FUNCTION TABLE
(1)
Inputs
x
OE
OE
xDIR
Outputs
L
L
Bus B Data to Bus A
L
H
Bus A Data to Bus B
H
X
High Z State
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
Z = High Impedance
2545 tbl 01
NOTES:
1. On FCT162H245T these pins have “Bus Hold”. All other pins are standard
inputs, outputs or I/Os.
2. On FCT166245T this is the
±
8mA Port.
3. On FCT166245T this is the +64/–32mA Port.
Pin Names
Description
x
OE
Output Enable Input (Active LOW)
xDIR
Direction Control Input
xAx
Side A Inputs or 3-State Outputs
(1,2)
xBx
Side B Inputs or 3-State Outputs
(1,3)
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
2545 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 and FCT166XXXT (A-Port)
Output and I/O terminals.
3. Output and I/O terminals for FCT162XXXT and FCT166XXXT (A-Port).
5.3
4
IDT54/74FCT16245T/AT/CT/ET, 162245T/AT/CT/ET, IDT54/74FCT166245T/AT/CT, IDT54/74FCT162H245T/AT/CT/ET
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
ADVANCE INFORMATION
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
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
OUTPUT DRIVE CHARACTERISTICS FOR FCT162245T
OUTPUT DRIVE CHARACTERISTICS FOR FCT166245T (A-PORT ONLY)
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)
16
48
96
mA
I
ODH
Output HIGH Current
V
CC
= 5V, V
IN
= V
IH
or V
IL,
V
OUT
= 1.5V
(3)
–16
–48
–96
mA
V
OH
Output HIGH Voltage
V
CC
= Min.
V
IN
= V
IH
or
V
IL
I
OH
= –6mA MIL.
I
OH
= –8mA COM'L.
2.4
3.3
—
V
V
OL
Output LOW Voltage
V
CC
= Min.
V
IN
= V
IH
or V
IL
I
OL
= 6mA MIL.
I
OL
= 8mA COM'L.
—
0.3
0.55
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 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
µ
A at T
A
= –55
°
C.
2545 lnk 08
2545 lnk 07
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
µ
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
µ
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
µ
A
2545 lnk 05
OUTPUT DRIVE CHARACTERISTICS FOR FCT16245T AND FCT166245T (B-PORT)
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
µ
A
2545 lnk 06
5.3
5
IDT54/74FCT16245T/AT/CT/ET, 162245T/AT/CT/ET, IDT54/74FCT166245T/AT/CT, IDT54/74FCT162H245T/AT/CT/ET
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
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