IDT IDT74FCT16245ATE Fast cmos 16-bit bidirectional transceiver Datasheet

Integrated Device Technology, Inc.
FAST CMOS 16-BIT
BIDIRECTIONAL
TRANSCEIVERS
IDT54/74FCT16245T/AT/CT/ET
IDT54/74FCT162245T/AT/CT/ET
IDT54/74FCT166245T/AT/CT
IDT54/74FCT162H245T/AT/CT/ET
FEATURES:
DESCRIPTION:
• Common features:
– 0.5 MICRON CMOS Technology
– High-speed, low-power CMOS replacement for
ABT functions
– Typical tSK(o) (Output Skew) < 250ps
– Low input and output leakage ≤ 1µA (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 IOH, 64mA IOL)
– Power off disable outputs permit “live insertion”
– Typical VOLP (Output Ground Bounce) < 1.0V at
VCC = 5V, TA = 25°C
• Features for FCT162245T/AT/CT/ET:
– Balanced Output Drivers: ±24mA (commercial),
±16mA (military)
– Reduced system switching noise
– Typical VOLP (Output Ground Bounce) < 0.6V at
VCC = 5V,TA = 25°C
The 16-bit transceivers are built using advanced dual metal
CMOS technology. These high-speed, low-power transceivers 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 transceivers or one 16-bit transceiver. The direction control pin
(xDIR) controls the direction of data flow. The output enable
pin (xOE) 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-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 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-topoint driving where there is a single receiver, or a light lumped
FUNCTIONAL BLOCK DIAGRAM
1
DIR
2
DIR
2OE
1OE
2A1
1A1
1B1
2B1
1A2
2A2
1B2
2B2
1A3
2A3
2B3
1B3
1A4
2A4
2B4
1B4
1A5
2A5
2B5
1B5
1A6
2A6
2B6
1B6
1A7
2A7
1B7
2B7
1A8
2A8
1B8
2B8
2545 drw 02
2545 drw 01
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
1996 Integrated Device Technology, Inc.
5.3
AUGUST 1996
DSC-2545/9
1
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
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 VOLP (Output Ground Bounce) < 0.25V at
VCC = 5V,TA = 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 resistors. 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
1DIR
1
48
1OE
1A1
1B1
2
47
1A1
46
1A2
1B2
3
46
1A2
4
45
GND
GND
4
45
GND
1B3
5
44
1A3
1B3
5
44
1A3
1B4
6
43
1A4
1B4
6
43
1A4
VCC
7
42
VCC
VCC
7
42
VCC
1B5
8
41
1A5
1B5
8
41
1A5
1B6
9
40
1A6
1B6
9
40
1A6
GND
10
39
GND
GND
10
39
GND
1B7
11
38
1A7
1B7
11
38
1A7
1B8
12
1A8
1B8
12
37
1A8
2B1
13
SO48-1 37
SO48-2
SO48-3 36
2A1
2B1
13
36
2A1
2B2
14
35
2A2
2B2
14
35
2A2
GND
15
34
GND
GND
15
34
GND
2B3
16
33
2A3
2B3
16
33
2A3
2B4
17
32
2A4
2B4
17
32
2A4
VCC
18
31
VCC
VCC
18
31
VCC
2B5
19
30
2A5
2B5
19
30
2A5
2B6
20
29
2A6
2B6
20
29
2A6
GND
21
28
GND
GND
21
28
GND
2B7
22
27
2A7
2B7
22
27
2A7
2B8
23
26
2A8
2B8
23
26
2A8
2DIR
24
25
2OE
2DIR
24
25
2OE
1DIR
1
48
1OE
1B1
2
47
1B2
3
GND
E48-1
2545 drw 03
2545 drw 04
SSOP/
TSSOP/TVSOP
TOP VIEW
CERPACK
TOP VIEW
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
FUNCTION TABLE(1)
PIN DESCRIPTION
Pin Names
xOE
Inputs
Description
Output Enable Input (Active LOW)
xOE
xDIR
Outputs
Direction Control Input
L
L
Bus B Data to Bus A
xAx
Side A Inputs or 3-State Outputs(1,2)
L
H
Bus A Data to Bus B
xBx
Side B Inputs or 3-State Outputs(1,3)
H
X
High Z State
xDIR
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.
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
Z = High Impedance
ABSOLUTE MAXIMUM RATINGS(1)
CAPACITANCE (TA = +25°C, f = 1.0MHz)
2545 tbl 01
Symbol
Description
Max.
VTERM(2) Terminal Voltage with Respect to –0.5 to +7.0
GND
VTERM(3) Terminal Voltage with Respect to
–0.5 to
GND
VCC +0.5
TSTG
Storage Temperature
–65 to +150
Unit
V
I OUT
mA
DC Output Current
–60 to +120
Symbol
Parameter(1)
CIN
Input
Capacitance
CI/O
I/O
Capacitance
V
°C
2545 tbl 02
Conditions
VIN = 0V
Typ.
3.5
VOUT = 0V
3.5
Max. Unit
6.0
pF
8.0
NOTE:
1. This parameter is measured at characterization but not tested.
pF
2545 lnk 04
2545 lnk 03
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 FCT162XXXT and FCT166XXXT (A-Port)
Output and I/O terminals.
3. Output and I/O terminals for FCT162XXXT and FCT166XXXT (A-Port).
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
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE (STANDARD PARTS)
Following Conditions Apply Unless Otherwise Specified:
Commercial: TA =–40°C to +85°C, VCC = 5.0V ± 10%; Military: TA = –55°C to +125°C, VCC = 5.0V ± 10%
Parameter
Input HIGH Level
Test Conditions(1)
Guaranteed Logic HIGH Level
VIL
Input LOW Level
II H
Input HIGH Current (Input pins)(5)
Symbol
VIH
Min.
2.0
Typ.(2)
—
Max.
Guaranteed Logic LOW Level
—
—
0.8
V
VCC = Max.
—
—
±1
µA
—
—
±1
—
—
±1
—
—
±1
—
—
±1
VI = VCC
Input HIGH Current (I/O pins)(5)
II L
Input LOW Current (Input
pins)(5)
VI = GND
Input LOW Current (I/O pins)(5)
I OZH
High Impedance Output Current
VCC = Max.
VO = 2.7V
pins) (5)
I OZL
(3-State Output
VIK
Clamp Diode Voltage
VO = 0.5V
VCC = Min., IIN = –18mA
I OS
Short Circuit Current
VCC = Max., VO =
VH
Input Hysteresis
I CCL
I CCH
I CCZ
Quiescent Power Supply Current
GND (3)
—
VCC = Max., VIN = GND or VCC
—
Unit
V
µA
—
—
±1
—
–0.7
–1.2
V
–80
–140
–225
mA
—
100
—
mV
—
5
500
µA
2545 lnk 05
OUTPUT DRIVE CHARACTERISTICS FOR FCT16245T AND FCT166245T (B-PORT)
Symbol
IO
Parameter
Output Drive Current
VOH
Output HIGH Voltage
Test Conditions(1)
VCC = Max., VO = 2.5V(3)
Min.
–50
Typ.(2)
—
Max.
–180
Unit
mA
VCC = Min.
2.5
3.5
—
V
2.4
3.5
—
V
2.0
3.0
—
V
—
0.2
0.55
V
—
—
±1
I OH = –3mA
VIN = VIH or V IL
VOL
Output LOW Voltage
I OFF
Input/Output Power Off Leakage(5)
VCC = Min.
VIN = VIH or V IL
VCC = 0V, VIN or V O
I OH = –12mA MIL.
I OH = –15mA COM'L.
I OH = –24mA MIL.
I OH = –32mA COM'L.(4)
I OL = 48mA MIL.
I OL = 64mA COM'L.
≤ 4.5V
µA
2545 lnk 06
OUTPUT DRIVE CHARACTERISTICS FOR FCT162245T
Symbol
I ODL
Parameter
Output LOW Current
Test Conditions(1)
VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V (3)
Min.
60
Typ.(2)
115
Max.
200
Unit
mA
I ODH
Output HIGH Current
VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V(3)
–60
–115
–200
mA
VOH
Output HIGH Voltage
2.4
3.3
—
V
VOL
Output LOW Voltage
VCC = Min.
VIN = VIH or V IL
VCC = Min.
VIN = VIH or V IL
—
0.3
0.55
V
I OH = –16mA MIL.
I OH = –24mA COM'L.
I OL = 16mA MIL.
I OL = 24mA COM'L.
N
O
I
T
2545 lnk 07
OUTPUT DRIVE CHARACTERISTICS FOR FCT166245T (A-PORT ONLY)
MA
Symbol
I ODL
Parameter
Output LOW Current
Test Conditions(1)
VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V (3)
Min.
16
Typ.(2)
48
Max.
96
Unit
mA
I ODH
Output HIGH Current
VCC = 5V, VIN = VIH or V IL, VOUT = 1.5V (3)
–16
–48
–96
mA
VOH
Output HIGH Voltage
2.4
3.3
—
V
VOL
Output LOW Voltage
VCC = Min.
VIN = VIH or VIL
VCC = Min.
VIN = VIH or V IL
—
0.3
0.55
V
A
V
D
E
C
N
O
F
N
I
R
I OH = –6mA MIL.
I OH = –8mA COM'L.
I OL = 6mA MIL.
I OL = 8mA COM'L.
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 ± 5µA at TA = –55°C.
A
5.3
2545 lnk 08
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
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE (BUS HOLD)
Following Conditions Apply Unless Otherwise Specified:
Commercial: TA =–40°C to +85°C, VCC = 5.0V ± 10%; Military: TA = –55°C to +125°C, VCC = 5.0V ± 10%
Symbol
VIH
Test Conditions(1)
Guaranteed Logic HIGH Level
Parameter
Input HIGH Level
VIL
Input LOW Level
II H
Input
Standard Input(5)
HIGH
Current(4)
Typ.(2)
—
Max.
—
Unit
V
Guaranteed Logic LOW Level
—
—
0.8
V
VCC = Max.
—
—
±1
µA
Standard I/O(5)
—
—
±1
Bus Hold Input
—
—
±100
VI = VCC
—
—
±100
—
—
±1
LOW
Standard
I/O(5)
—
—
±1
Current(4)
Bus Hold Input
—
—
±100
Bus Hold I/O
—
—
±100
VI = 2.0V
–50
—
—
VI = 0.8V
+50
—
—
VO = 2.7V
—
—
±1
VO = 0.5V
—
—
±1
—
–0.7
–1.2
–80
–140
–225
mA
—
100
—
mV
—
5
500
µA
Bus Hold I/O
II L
Min.
2.0
Input
Standard Input(5)
I BHH
Bus Hold
Bus Hold Input
I BHL
I OZH
Sustain
Current(4)
High Impedance Output Current
I OZL
(3-State Output pins) (5,6)
VIK
Clamp Diode Voltage
I OS
Short Circuit Current
VH
Input Hysteresis
I CCL
I CCH
I CCZ
Quiescent Power Supply Current
VI = GND
VCC = Min.
VCC = Max.
VCC = Min., IIN = –18mA
VCC = Max., VO =
GND(3)
—
VCC = Max., VIN = GND or VCC
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 ± 5µA at TA = –55°C.
6. Does not include Bus Hold I/O pins.
5.3
µA
µA
V
2545 lnk 09
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
POWER SUPPLY CHARACTERISTICS
Symbol
Parameter
Test Conditions(1)
Min.
Typ.(2)
Max.
Unit
—
0.5
1.5
mA
∆ICC
Quiescent Power Supply Current
TTL Inputs HIGH
Vcc = Max.
VIN = 3.4V(3)
ICCD
Dynamic Power Supply Current(4)
Vcc = Max.
Outputs Open
xOE = xDIR = GND
One Input Toggling
50% Duty Cycle
VIN = VCC
VIN = GND
—
60
100
µA/
MHz
IC
Total Power Supply Current(6)
Vcc = Max.
Outputs Open
fi = 10MHz
50% Duty Cycle
xOE = xDIR = GND
One Bit Toggling
VIN = VCC
VIN = GND
—
0.6
1.5
mA
VIN = 3.4V
VIN = GND
—
0.9
2.3
Vcc = Max.
Outputs Open
fi = 2.5MHz
50% Duty Cycle
xOE = xDIR = GND
Sixteen Bits Toggling
VIN = VCC
VIN = GND
—
2.4
4.5(5)
VIN = 3.4V
VIN = GND
—
6.4
16.5(5)
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. Per TTL driven input (VIN = 3.4V). All other inputs at VCC or GND.
4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.
5. Values for these conditions are examples of the ICC formula. These limits are guaranteed but not tested.
6. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ∆ICC DHNT + ICCD (fCPNCP/2 + fiNi)
ICC = Quiescent Current (ICCL, ICCH and ICCZ)
∆ICC = Power Supply Current for a TTL High Input (VIN = 3.4V)
DH = Duty Cycle for TTL Inputs High
NT = Number of TTL Inputs at DH
ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices)
NCP = Number of Clock Inputs at fCP
fi = Input Frequency
Ni = Number of Inputs at fi
5.3
2545 tbl 10
6
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
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
FCT16245T/162245T(5)
Com'l.
Symbol
Parameter
Condition(1)
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPZH
tPZL
tPHZ
tPLZ
tSK(o)
Propagation Delay
A to B, B to A
Output Enable Time
xOE to A or B
Output Disable Time
xOE to A or B
Output Enable Time
xDIR to A or B (4)
Output Disable Time
xDIR to A or B (4)
Output Skew (3)
CL = 50pF
RL = 500Ω
Min.(2)
1.5
FCT16245AT/162245AT(5)
Mil.
Max.
Min.(2)
7.0
1.5
1.5
9.5
1.5
Com'l.
Max.
Min.(2)
7.5
1.5
1.5
10.0
7.5
1.5
1.5
9.5
1.5
—
Mil.
Max.
Min.(2)
Max.
Unit
4.6
1.5
4.9
ns
1.5
6.2
1.5
6.5
ns
10.0
1.5
5.0
1.5
6.0
ns
1.5
10.0
1.5
6.2
1.5
6.5
ns
7.5
1.5
10.0
1.5
5.0
1.5
6.0
ns
0.5
—
0.5
—
0.5
—
0.5
ns
2545 tbl 11
FCT16245CT/162245CT(5)
Com'l.
FCT16245ET/162245ET(5)
Mil.
Com'l.
Mil.
Symbol
Parameter
Condition(1)
Min.(2)
Max.
Min.(2)
Max.
Min.(2)
Max.
Min.(2)
Max.
Unit
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPZH
tPZL
tPHZ
tPLZ
tSK(o)
Propagation Delay
A to B, B to A
Output Enable Time
xOE to A or B
Output Disable Time
xOE to A or B
Output Enable Time
xDIR to A or B (4)
Output Disable Time
xDIR to A or B (4)
Output Skew (3)
CL = 50pF
RL = 500Ω
1.5
4.1
1.5
4.5
1.5
3.2
—
—
ns
1.5
5.8
1.5
6.2
1.5
4.4
—
—
ns
1.5
4.8
1.5
5.2
1.5
4.0
—
—
ns
1.5
5.8
1.5
6.2
1.5
4.8
—
—
ns
1.5
4.8
1.5
5.2
1.5
4.0
—
—
ns
—
0.5
—
0.5
—
0.5
—
—
ns
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
3. Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design.
4. This parameter is guaranteed but not tested.
5. Including parts with Bus Hold.
5.3
2545 tbl 12
7
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
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
Com'l.
tPLH
tPHL
tPLH
tPHL
tPZH
tPZL
tPZH
tPZL
tPHZ
tPLZ
tPHZ
tPLZ
tPZH
tPZL
tPZH
tPZL
tPHZ
tPLZ
tPHZ
tPLZ
tSK(o)
Parameter
Condition(1)
Min.(2)
Propagation Delay
A to B
Propagation Delay
B to A
Output Enable Time
xOE to B
Output Enable Time
xOE to A
Output Disable Time
xOE to B
Output Disable Time
xOE to A
Output Enable Time
xDIR to B (4)
Output Enable Time
xDIR to A (4)
Output Disable Time
xDIR to B (4)
Output Disable Time
xDIR to A (4)
Output Skew (3)
CL = 50pF
RL = 500Ω
1.5
1.5
1.5
1.5
1.5
1.5
1.5
Mil.
Max.
Min.(2)
4.6
1.5
7.0
Com'l.
Max.
Min.(2)
FCT166245CT
4.9
1.5
1.5
7.5
6.2
1.5
9.5
Mil.
Com'l.
Min.(2)
Mil.
Max.
Min.(2)
Max.
4.1
1.5
4.5
ns
1.5
4.6
1.5
4.9
ns
6.5
1.5
5.8
1.5
6.2
ns
1.5
10.0
1.5
6.2
1.5
6.5
ns
5.0
1.5
6.0
1.5
4.8
1.5
5.2
ns
7.5
1.5
10.0
1.5
5.0
1.5
6.0
ns
6.2
1.5
6.5
1.5
5.8
1.5
6.2
ns
AD
VA
NC
E
Symbol
FCT166245AT
IN
FO
RM
AT
IO
N
FCT166245T
Max.
Min.(2)
Max. Unit
1.5
9.5
1.5
10.0
1.5
6.2
1.5
6.5
ns
1.5
5.0
1.5
6.0
1.5
4.8
1.5
5.2
ns
1.5
7.5
1.5
10.0
1.5
5.0
1.5
6.0
ns
—
0.5
—
0.5
—
0.5
—
0.5
ns
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
3. Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design.
4. This parameter is guaranteed but not tested.
5.3
2545 tbl 13
8
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
TEST CIRCUITS AND WAVEFORMS
SWITCH POSITION
TEST CIRCUITS FOR ALL OUTPUTS
V CC
500Ω
Pulse
Generator
Switch
Open Drain
Disable Low
Closed
Enable Low
V OUT
VIN
Test
7.0V
Open
All Other Tests
D.U.T.
50pF
RT
2545 lnk 14
DEFINITIONS:
CL= Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse
Generator.
500Ω
CL
2545 drw 05
SET-UP, HOLD AND RELEASE TIMES
DATA
INPUT
tH
tSU
TIMING
INPUT
ASYNCHRONOUS CONTROL
PRESET
CLEAR
ETC.
SYNCHRONOUS CONTROL
PRESET
CLEAR
CLOCK ENABLE
ETC.
tREM
tSU
PULSE WIDTH
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
LOW-HIGH-LOW
PULSE
1.5V
tW
HIGH-LOW-HIGH
PULSE
1.5V
3V
1.5V
0V
tH
2545 drw 07
2545 drw 06
PROPAGATION DELAY
ENABLE AND DISABLE TIMES
ENABLE
SAME PHASE
INPUT TRANSITION
tPLH
tPHL
OUTPUT
tPLH
OPPOSITE PHASE
INPUT TRANSITION
tPHL
3V
1.5V
0V
DISABLE
3V
1.5V
CONTROL
INPUT
tPZL
VOH
1.5V
VOL
OUTPUT
NORMALLY
LOW
3V
1.5V
0V
SWITCH
CLOSED
2545 drw 08
SWITCH
OPEN
3.5V
3.5V
1.5V
tPZH
OUTPUT
NORMALLY
HIGH
0V
tPLZ
0.3V
VOL
tPHZ
0.3V
VOH
1.5V
0V
0V
2545 drw 09
NOTES:
1. Diagram shown for input Control Enable-LOW and input Control
Disable-HIGH
2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2.5ns; tR ≤ 2.5ns
5.3
9
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
ORDERING INFORMATION
IDT
XX
Temp. Range
FCT
X
X
XXXX
X
X
Drive
Bus Hold
Device Type
Package
Process
Blank
B
Commercial
MIL-STD-883, Class B
PV
PA
PF
E
Shrink Small Outline Package (SO48-1)
Thin Shrink Small Outline Package (SO48-2)
Thin Very Small Outline Package (SO48-3)
CERPACK (E48-1)
245T
245AT
245CT
245ET
Non-Inverting 16-Bit Bidirectional Transceiver
Blank
H
Standard
Bus Hold
16
162
166
16-Bit High Drive
16-Bit Balanced Drive
16-Bit Light Drive
54
74
–55°C to +125°C
–40°C to +85°C
2545 drw 10
5.3
10
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