IDT74FCT166245TE [IDT]
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS; FAST CMOS 16位双向收发器
| 型号： | IDT74FCT166245TE |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS |
| 文件： | 总10页 (文件大小：189K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
IDT54/74FCT16245T/AT/CT/ET
IDT54/74FCT162245T/AT/CT/ET
IDT54/74FCT166245T/AT/CT
FAST CMOS 16-BIT
BIDIRECTIONAL
TRANSCEIVERS
IDT54/74FCT162H245T/AT/CT/ET
Integrated Device Technology, Inc.
DESCRIPTION:
FEATURES:
The16-bittransceiversarebuiltusingadvanceddualmetal
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 (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-capaci-
tance loads and low-impedance backplanes. The output buff-
ersaredesignedwithpoweroffdisablecapabilitytoallow"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.
• 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
The FCT166245T are suited for very low noise, point-to-
point driving where there is a single receiver, or a light lumped
– Typical VOLP (Output Ground Bounce) < 0.6V at
VCC = 5V,TA = 25°C
FUNCTIONAL BLOCK DIAGRAM
1 DIR
2 DIR
2
2
2
2
2
OE
1OE
2
A
A
1
2
1A1
1B1
B
B
1
2
3
4
1A2
2
1B2
1A3
2
A
A
A
A
3
4
B
B
B
B
1B3
1A4
2
1B4
1A5
2
2
5
6
2
2
5
6
1B5
1A6
1B6
1A7
2
A
A
7
8
1B7
2
B
B
7
8
1A8
2
1B8
2
2545 drw 02
2545 drw 01
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
AUGUST 1996
1996 Integrated Device Technology, Inc.
5.3
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
DESCRIPTION: (Cont'd.)
FEATURES: (Cont'd.)
• Features for FCT166245T/AT/CT:
– Light Drive A Port: ±8mA (commercial),
±6mA (military)
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.
– 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
PIN CONFIGURATIONS
1DIR
1
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
1OE
1A1
1
DIR
1
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
1
1
1
OE
1B1
1B2
2
1
1
B
1
2
2
A
1
2
3
1A2
B
3
A
GND
1B3
4
GND
1A3
GND
4
GND
5
1
1
B
3
4
5
1
1
A
3
4
1B4
6
1A4
B
6
A
VCC
1B5
7
VCC
1A5
V
CC
7
V
CC
8
1
B
5
6
8
1
A5
1B6
9
1A6
1
B
9
1A
6
GND
1B7
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
GND
1A7
GND
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
GND
1
1
2
2
B7
B8
B1
B2
1
1
2
2
A7
A8
A1
A2
1B8
1A8
SO48-1
SO48-2
SO48-3
E48-1
2B1
2A1
2B2
2A2
GND
2B3
GND
2A3
GND
GND
2
2
B
3
4
2
2
A
3
4
2B4
2A4
B
A
VCC
2B5
VCC
2A5
V
CC
V
CC
2
B
5
6
2
A5
2B6
2A6
2
B
2A
6
GND
2B7
GND
2A7
GND
GND
2
2
B
7
8
2
2
A
7
8
2B8
2A8
B
A
2DIR
2
DIR
2OE
2
OE
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
Inputs
Pin Names
Description
x
xDIR
Outputs
Bus B Data to Bus A
OE
L
xOE
Output Enable Input (Active LOW)
L
H
X
xDIR
xAx
Direction Control Input
Side A Inputs or 3-State Outputs(1,2)
Side B Inputs or 3-State Outputs(1,3)
L
Bus A Data to Bus B
High Z State
H
xBx
2545 tbl 02
NOTE:
2545 tbl 01
NOTES:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
1. OnFCT162H245Tthesepinshave“BusHold”. Allotherpinsarestandard
inputs, outputs or I/Os.
2. On FCT166245T this is the ±8mA Port.
Z = High Impedance
3. On FCT166245T this is the +64/–32mA Port.
ABSOLUTE MAXIMUM RATINGS(1)
CAPACITANCE (TA = +25°C, f = 1.0MHz)
Symbol
Description
Max.
Unit
Symbol
Parameter(1)
Input
Capacitance
I/O
Conditions
Typ. Max. Unit
(2) Terminal Voltage with Respect to
VTERM
–0.5 to +7.0
V
CIN
VIN = 0V
3.5
6.0
pF
GND
(3) Terminal Voltage with Respect to
GND
VTERM
–0.5 to
VCC +0.5
V
CI/O
VOUT = 0V
3.5
8.0
pF
Capacitance
TSTG
Storage Temperature
DC Output Current
–65 to +150 °C
2545 lnk 04
NOTE:
1. This parameter is measured at characterization but not tested.
IOUT
–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
onlyandfunctionaloperationofthedeviceattheseoranyotherconditions
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%
Symbol
Parameter
Input HIGH Level
Test Conditions(1)
Min. Typ.(2) Max.
Unit
VIH
Guaranteed Logic HIGH Level
2.0
—
—
—
—
—
—
—
—
–80
—
—
—
—
—
0.8
±1
V
VIL
II H
Input LOW Level
Guaranteed Logic LOW Level
V
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)
VCC = Max.
VI = VCC
—
µA
—
±1
II L
VI = GND
—
±1
—
±1
IOZH
IOZL
VIK
VCC = Max.
VO = 2.7V
VO = 0.5V
—
±1
µA
—
±1
Clamp Diode Voltage
VCC = Min., IIN = –18mA
VCC = Max., VO = GND(3)
—
–0.7
–140
100
5
–1.2
–225
—
V
IOS
VH
Short Circuit Current
mA
mV
µA
Input Hysteresis
ICCL
ICCH
ICCZ
Quiescent Power Supply Current
VCC = Max., VIN = GND or VCC
500
2545 lnk 05
OUTPUT DRIVE CHARACTERISTICS FOR FCT16245T AND FCT166245T (B-PORT)
Symbol
Parameter
Test Conditions(1)
VCC = Max., VO = 2.5V(3)
Min. Typ.(2) Max.
Unit
IO
Output Drive Current
–50
2.5
2.4
—
3.5
3.5
–180
—
mA
VOH
Output HIGH Voltage
VCC = Min.
IOH = –3mA
V
V
VIN = VIH or VIL
IOH = –12mA MIL.
IOH = –15mA COM'L.
IOH = –24mA MIL.
IOH = –32mA COM'L.(4)
IOL = 48mA MIL.
—
2.0
—
3.0
0.2
—
—
0.55
±1
V
V
VOL
Output LOW Voltage
VCC = Min.
VIN = VIH or VIL
IOL = 64mA COM'L.
IOFF
Input/Output Power Off Leakage(5) VCC = 0V, VIN or VO ≤ 4.5V
—
µA
2545 lnk 06
OUTPUT DRIVE CHARACTERISTICS FOR FCT162245T
Symbol
Parameter
Test Conditions(1)
Min. Typ.(2) Max.
Unit
I
I
ODL
Output LOW Current
V
CC = 5V, VIN = VIH or VIL,
CC = 5V, VIN = VIH or VIL,
V
OUT = 1.5V(3)
60
–60
2.4
115
200
mA
ODH
Output HIGH Current
Output HIGH Voltage
V
V
OUT = 1.5V(3)
–115 –200
mA
V
V
OH
OL
V
V
V
V
CC = Min.
IN = VIH or VIL
CC = Min.
I
OH = –16mA MIL.
OH = –24mA COM'L.
OL = 16mA MIL.
3.3
0.3
—
I
I
I
V
Output LOW Voltage
—
0.55
V
IN = VIH or VIL
OL = 24mA COM'L.
2545 lnk 07
OUTPUT DRIVE CHARACTERISTICS FOR FCT166245T (A-PORT ONLY)
Symbol
Parameter
Test Conditions(1)
Min. Typ.(2) Max.
Unit
I
I
ODL
Output LOW Current
V
CC = 5V, VIN = VIH or VIL,
CC = 5V, VIN = VIH or VIL,
V
V
OUT= 1.5V(3)
16
–16
2.4
48
–48
3.3
96
–96
—
mA
ODH
Output HIGH Current
Output HIGH Voltage
V
OUT= 1.5V(3)
mA
V
V
OH
OL
V
V
V
V
CC = Min.
IN = VIH or VIL
CC = Min.
I
I
I
I
OH = –6mA MIL.
OH = –8mA COM'L.
OL = 6mA MIL.
V
Output LOW Voltage
—
0.3
0.55
V
IN = VIH or VIL
OL = 8mA COM'L.
2545 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. Duration of the condition can not exceed one second.
5. The test limit for this parameter is ± 5µA at TA = –55°C.
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
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
Parameter
Input HIGH Level
Input LOW Level
Test Conditions(1)
Min. Typ.(2) Max.
Unit
VIH
Guaranteed Logic HIGH Level
2.0
—
—
—
—
—
—
—
—
—
—
—
—
—
—
V
VIL
Guaranteed Logic LOW Level
0.8
V
I
I
I H
Input
Standard Input(5)
V
CC = Max.
VI
= VCC
—
±
1
1
µA
HIGH
Current(4)
Standard I/O(5)
Bus Hold Input
Bus Hold I/O
—
±
—
±
100
100
—
±
I L
Input
LOW
Standard Input(5)
Standard I/O(5)
VI
= GND
—
±
1
1
—
±
Current(4) Bus Hold Input
—
±
100
100
—
Bus Hold I/O
—
±
I
I
BHH
BHL
Bus Hold
Bus Hold Input
VCC = Min.
V
I
= 2.0V
= 0.8V
–50
+50
µ
A
A
Sustain
Current(4)
VI
—
I
I
OZH
OZL
High Impedance Output Current
(3-State Output pins)(5,6)
Clamp Diode Voltage
VCC = Max.
V
O
= 2.7V
= 0.5V
—
—
—
—
±
1
1
µ
VO
±
VIK
V
CC = Min., IIN = –18mA
—
–0.7
–1.2
V
I
OS
Short Circuit Current
V
CC = Max., V
O
= GND(3)
–80
—
–
140
100
5
–
225
mA
mV
V
H
Input Hysteresis
—
—
I
I
I
CCL
CCH
CCZ
Quiescent Power Supply Current
VCC = Max., VIN = GND or VCC
—
500
µA
2545 lnk 09
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
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
∆ICC
Quiescent Power Supply Current
TTL Inputs HIGH
Vcc = Max.
—
0.5
1.5
mA
VIN = 3.4V(3)
ICCD
Dynamic Power Supply Current(4)
Total Power Supply Current(6)
Vcc = Max.
Outputs Open
xOE = xDIR = GND
One Input Toggling
50% Duty Cycle
VIN = VCC
VIN = GND
—
60
100
µA/
MHz
IC
Vcc = Max.
Outputs Open
fi = 10MHz
50% Duty Cycle
xOE = xDIR = GND
One Bit Toggling
VIN = VCC
VIN = GND
—
—
0.6
0.9
1.5
2.3
mA
VIN = 3.4V
VIN = GND
Vcc = Max.
Outputs Open
fi = 2.5MHz
50% Duty Cycle
xOE = xDIR = GND
VIN = VCC
VIN = GND
—
—
2.4
6.4
4.5(5)
VIN = 3.4V
VIN = GND
16.5(5)
Sixteen Bits Toggling
2545 tbl 10
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
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)
FCT16245AT/162245AT(5)
Com'l. Mil.
Com'l.
Mil.
Symbol
tPLH
Parameter
Propagation Delay
A to B, B to A
Condition(1)
CL = 50pF
RL = 500Ω
Min.(2)
Max.
Min.(2)
Max.
Min.(2)
Max.
Min.(2)
Max.
Unit
1.5
1.5
1.5
1.5
1.5
—
7.0
1.5
7.5
1.5
1.5
1.5
1.5
1.5
—
4.6
1.5
4.9
ns
tPHL
tPZH
Output Enable Time
xOE to A or B
9.5
7.5
9.5
7.5
0.5
1.5
1.5
1.5
1.5
—
10.0
10.0
10.0
10.0
0.5
6.2
5.0
6.2
5.0
0.5
1.5
1.5
1.5
1.5
—
6.5
6.0
6.5
6.0
0.5
ns
ns
ns
ns
tPZL
tPHZ
tPLZ
tPZH
tPZL
tPHZ
tPLZ
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)
tSK(o) Output Skew(3)
ns
2545 tbl 11
FCT16245CT/162245CT(5)
Com'l. Mil.
FCT16245ET/162245ET(5)
Com'l. Mil.
Symbol
Parameter
Condition(1)
CL = 50pF
RL = 500Ω
Min.(2)
Max.
Min.(2)
Max.
Min.(2)
Max.
Min.(2)
Max.
Unit
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPZH
tPZL
Propagation Delay
A to B, B to A
1.5
1.5
1.5
1.5
1.5
—
4.1
1.5
4.5
1.5
1.5
1.5
1.5
1.5
—
3.2
—
—
ns
Output Enable Time
xOE to A or B
5.8
4.8
5.8
4.8
0.5
1.5
1.5
1.5
1.5
—
6.2
5.2
6.2
5.2
0.5
4.4
4.0
4.8
4.0
0.5
—
—
—
—
—
—
—
—
—
—
ns
ns
ns
ns
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)
tPHZ
tPLZ
tSK(o) Output Skew(3)
ns
2545 tbl 12
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
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
FCT166245T
Com'l. Mil.
Condition(1) Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Unit
FCT166245AT
FCT166245CT
Com'l. Mil.
Com'l. Mil.
Symbol
Parameter
tPLH Propagation Delay
tPHL A to B
CL = 50pF 1.5 4.6 1.5 4.9 1.5 4.1 1.5 4.5
RL = 500Ω
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
tPLH Propagation Delay
tPHL B to A
1.5 7.0 1.5 7.5 1.5 4.6 1.5 4.9
tPZH Output Enable Time
tPZL xOE to B
1.5 6.2 1.5 6.5 1.5 5.8 1.5 6.2
1.5 9.5 1.5 10.0 1.5 6.2 1.5 6.5
1.5 5.0 1.5 6.0 1.5 4.8 1.5 5.2
1.5 7.5 1.5 10.0 1.5 5.0 1.5 6.0
1.5 6.2 1.5 6.5 1.5 5.8 1.5 6.2
1.5 9.5 1.5 10.0 1.5 6.2 1.5 6.5
1.5 5.0 1.5 6.0 1.5 4.8 1.5 5.2
1.5 7.5 1.5 10.0 1.5 5.0 1.5 6.0
tPZH Output Enable Time
tPZL xOE to A
tPHZ Output Disable Time
tPLZ xOE to B
tPHZ Output Disable Time
tPLZ xOE to A
tPZH Output Enable Time
tPZL xDIR to B(4)
tPZH Output Enable Time
tPZL xDIR to A(4)
tPHZ Output Disable Time
tPLZ xDIR to B(4)
tPHZ Output Disable Time
tPLZ xDIR to A(4)
tSK(o) Output Skew(3)
—
0.5
—
0.5
—
0.5
—
0.5
ns
2545 tbl 13
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
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
TEST CIRCUITS FOR ALL OUTPUTS
VCC
SWITCH POSITION
Test
Switch
7.0V
Open Drain
Disable Low
Closed
500
Ω
Ω
Enable Low
VOUT
VIN
Pulse
Generator
Open
All Other Tests
DEFINITIONS:
CL= Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse
D.U.T.
2545 lnk 14
50pF
500
T
R
C
L
Generator.
2545 drw 05
SET-UP, HOLD AND RELEASE TIMES
PULSE WIDTH
3V
DATA
1.5V
0V
INPUT
LOW-HIGH-LOW
t
H
t
t
SU
1.5V
PULSE
3V
1.5V
0V
TIMING
INPUT
t
W
ASYNCHRONOUS CONTROL
t
REM
PRESET
3V
1.5V
0V
CLEAR
HIGH-LOW-HIGH
PULSE
1.5V
ETC.
SYNCHRONOUS CONTROL
PRESET
3V
1.5V
0V
2545 drw 07
CLEAR
CLOCK ENABLE
ETC.
SU
t
H
2545 drw 06
PROPAGATION DELAY
ENABLE AND DISABLE TIMES
ENABLE
DISABLE
3V
1.5V
0V
3V
SAME PHASE
CONTROL
INPUT
1.5V
0V
INPUT TRANSITION
t
PLH
t
t
PHL
PHL
t
PZL
tPLZ
VOH
OUTPUT
3.5V
1.5V
3.5V
1.5V
OUTPUT
NORMALLY
LOW
SWITCH
CLOSED
VOL
t
PLH
0.3V
0.3V
V
OL
3V
1.5V
0V
t
PZH
tPHZ
OPPOSITE PHASE
INPUT TRANSITION
VOH
OUTPUT
NORMALLY
HIGH
SWITCH
OPEN
1.5V
0V
2545 drw 08
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
FCT
X
XXXX
X
X
X
Temp. Range
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)
Non-Inverting 16-Bit Bidirectional Transceiver
245T
245AT
245CT
245ET
Standard
Bus Hold
Blank
H
16-Bit High Drive
16-Bit Balanced Drive
16-Bit Light Drive
16
162
166
–55°C to +125°C
–40°C to +85°C
54
74
2545 drw 10
5.3
10
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