IDT54FCT640CTL [IDT]
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS; 快速CMOS八路双向收发器
| 型号： | IDT54FCT640CTL |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS |
| 文件： | 总8页 (文件大小：161K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
IDT54/74FCT245T/AT/CT/DT - 2245T/AT/CT
IDT54/74FCT640T/AT/CT
FAST CMOS OCTAL
BIDIRECTIONAL
TRANSCEIVERS
IDT54/74FCT645T/AT/CT/DT
Integrated Device Technology, Inc.
FEATURES:
• Common features:
DESCRIPTION:
The IDT octal bidirectional transceivers are built using an
advanced dual metal CMOS technology. The FCT245T/
FCT2245T, FCT640T and FCT645T are designed for asyn-
chronous two-way communication between data buses. The
transmit/receive (T/R) input determines the direction of data
flow through the bidirectional transceiver. Transmit (active
HIGH) enables data from A ports to B ports, and receive
(active LOW) from B ports to A ports. The output enable (OE)
input, when HIGH, disables both A and B ports by placing
them in HIGH Z condition.
TheFCT245T/FCT2245TandFCT645Ttransceivershave
non-inverting outputs. The FCT640T has inverting outputs.
The FCT2245T has balanced drive outputs with current
limiting resistors. This offers low ground bounce, minimal
undershootandcontrolledoutputfalltimes-reducingtheneed
for external series terminating resistors. The FCT2xxxT parts
are plug-in replacements for FCTxxxT parts.
– Low input and output leakage ≤1µA (max.)
– CMOS power levels
– True TTL input and output compatibility
– VOH = 3.3V (typ.)
– VOL = 0.3V (typ.)
– Meets or exceeds JEDEC standard 18 specifications
– Product available in Radiation Tolerant and Radiation
Enhanced versions
– Military product compliant to MIL-STD-883, Class B
and DESC listed (dual marked)
– Available in DIP, SOIC, SSOP, QSOP, CERPACK
and LCC packages
• Features for FCT245T/FCT640T/FCT645T:
– Std., A, C and D speed grades
– High drive outputs (-15mA IOH, 64mA IOL)
• Features for FCT2245T:
– Std., A and C speed grades
– Resistor outputs (-15mA IOH, 12mA IOL Com.)
(-12mA IOH, 12mA IOL Mil.)
– Reduced system switching noise
PIN CONFIGURATIONS
FUNCTIONAL BLOCK DIAGRAM
1
2
20
19
18
T/R
A0
A1
A2
A3
A4
A5
A6
A7
Vcc
OE
B0
B1
B2
B3
B4
B5
B6
B7
T/R
3
P20-1
OE
D20-1 17
4
A
A
A
A
A
A
A
A
0
1
2
3
4
5
6
7
SO20-2
5
16
SO20-7*
15
6
B
B
B
B
B
B
B
0
1
2
3
4
5
6
SO20-8**
7
14
&
E20-1 13
8
9
12
11
10
GND
2539 drw 02
DIP/SOIC/SSOP/QSOP/CERPACK
TOP VIEW
*FCT245T/2245T, FCT645T only.
**FCT245T/2245T, FCT640T
INDEX
3
2
20 19
18
A2
A3
A4
A5
A6
4
5
6
7
8
B0
B1
B2
B3
B4
1
17
16
15
14
L20-2
10 11 12 13
9
B7
2539 drw 03
FCT245T/2245T, FCT645T are non-inverting options.
FCT640T is the inverting options.
LCC
2539 drw 01
TOP VIEW
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
AUGUST 1995
1995 Integrated Device Technology, Inc.
6.9
DSC-4611/4
1
IDT54/74FCT245T/AT/CT/DT - 2245T/AT/CT, IDT54/74FCT640T/AT/CT, IDT54/74FCT645T/AT/CT/DT
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN DESCRIPTION
FUNCTION TABLE(2)
Pin Names
Description
Inputs
OE
Output Enable Input (Active LOW)
T/
Outputs
Bus B Data to Bus A(1)
Bus B Data to Bus B(1)
High Z State
OE
L
R
T/R
Transmit/Receive Input
L
A
B
0
0
-A
7
7
Side A Inputs or 3-State Outputs
Side B Inputs or 3-State Outputs
L
H
X
-B
H
2539 tbl 02
2539 tbl 01
NOTES:
1. 640 is inverting from input to output.
2. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
ABSOLUTE MAXIMUM RATINGS(1)
CAPACITANCE (TA = +25°C, F = 1.0MHZ)
Parameter(1)
Conditions Typ. Max. Unit
Symbol
Rating
Commercial
Military
Unit
Symbol
(2)
VTERM
Terminal Voltage
with Respect to
GND
–0.5 to +7.0 –0.5 to +7.0
V
CIN
Input
Capacitance
Output
VIN = 0V
6
8
10
pF
COUT
VOUT = 0V
12
pF
(3)
VTERM
Terminal Voltage
with Respect to
GND
–0.5 to
–0.5 to
V
Capacitance
VCC +0.5
VCC +0.5
2539 lnk 04
NOTE:
1. This parameter is measured at characterization but not tested.
TA
Operating
0 to +70
–55 to +125 °C
Temperature
Temperature
Under Bias
Storage
TBIAS
TSTG
–55 to +125 –65 to +135 °C
–55 to +125 –65 to +150 °C
Temperature
Power Dissipation
PT
0.5
0.5
W
IOUT
DC Output
Current
–60 to +120 –60 to +120 mA
2539 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. No terminal voltage may exceed
VCC by +0.5V unless otherwise noted.
2. Input and VCC terminals only.
3. Outputs and I/O terminals only.
6.9
2
IDT54/74FCT245T/AT/CT/DT - 2245T/AT/CT, IDT54/74FCT640T/AT/CT, IDT54/74FCT645T/AT/CT/DT
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Commercial: TA = 0°C to +70°C, VCC = 5.0V ± 5%; 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
—
—
—
—
—
—
—
—
—
—
—
—
0.8
±1
±1
±1
±1
±1
–1.2
—
V
VIL
II H
II L
Input LOW Level
Guaranteed Logic LOW Level
V
Input HIGH Current(4)
Input LOW Current(4)
High Impedance Output Current
(3-State Output pins)(4)
Input HIGH Current(4)
Clamp Diode Voltage
Input Hysteresis
VCC = Max.
VCC = Max.
VI = 2.7V
VI = 0.5V
VO = 2.7V
VO = 0.5V
—
µA
—
IOZH
IOZL
II
—
µA
—
VCC = Max., VI = VCC (Max.)
VCC = Min., IIN = –18mA
—
—
µA
V
VIK
VH
ICC
–0.7
200
0.01
mV
Quiescent Power Supply Current
VCC = Max., VIN = GND or VCC
1
mA
2539 lnk 05
OUTPUT DRIVE CHARACTERISTICS FOR FCT245T/640T/645T
Symbol
Parameter
Test Conditions(1)
Min. Typ.(2) Max.
Unit
VOH
Output HIGH Voltage
VCC = Min.
VIN = VIH or VIL
IOH = –6mA MIL.
2.4
2.0
—
3.3
3.0
0.3
—
V
IOH = –8mA COM'L.
IOH = –12mA MIL.
IOH = –15mA COM'L.
IOL = 48mA MIL.
—
V
V
VOL
IOS
Output LOW Voltage
Short Circuit Current
VCC = Min.
VIN = VIH or VIL
VCC = Max., VO = GND(3)
0.55
IOL = 64mA COM'L.
–60
–120 –225
mA
2539 lnk 06
OUTPUT DRIVE CHARACTERISTICS FOR FCT2245T
Symbol
Parameter
Test Conditions(1)
CC = 5V, VIN = VIH or VIL,
OUT= 1.5V(3)
CC = 5V, VIN = VIH or VIL,
OUT= 1.5V(3)
Min. Typ.(2) Max.
Unit
I
I
ODL
Output LOW Current
V
V
V
16
–16
2.4
48
–48
3.3
—
—
—
mA
ODH
Output HIGH Current
Output HIGH Voltage
V
mA
V
V
OH
OL
V
V
V
V
CC = Min.
IN = VIH or VIL
CC = Min.
I
I
I
OH = –12mA MIL.
OH = –15mA COM'L.
OL = 12mA
V
Output LOW Voltage
—
0.3
0.50
V
IN = VIH or VIL
2539 lnk 07
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 shorted at one time. Duration of the short circuit test should not exceed one second.
4. The test limit for this parameter is ±5µA at TA = –55°C.
6.9
3
IDT54/74FCT245T/AT/CT/DT - 2245T/AT/CT, IDT54/74FCT640T/AT/CT, IDT54/74FCT645T/AT/CT/DT
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
Symbol
Parameter
Quiescent Power Supply Current
TTL Inputs HIGH
Test Conditions(1)
Min. Typ.(2) Max.
Unit
∆ICC
VCC = Max.
VIN = 3.4V(3)
—
—
—
0.5
2.0
mA
ICCD
Dynamic Power Supply
Current(4)
VCC = Max.
VIN = VCC FCTxxxT
VIN = GND
0.15
0.06
0.25
0.12
mA/
MHz
Outputs Open
OE = T/R = GND
One Input Toggling
50% Duty Cycle
VCC = Max.
FCT2xxxT
IC
Total Power Supply Current(6)
VIN = VCC FCTxxxT
VIN = GND FCT2xxxT
—
—
1.5
0.6
3.5
2.2
mA
Outputs Open
fi = 10MHz
50% Duty Cycle
VIN = 3.4
FCTxxxT
—
1.8
0.9
4.5
3.2
OE = T/R = GND
One Bit Toggling
VCC = Max.
VIN = GND FCT2xxxT
VIN = VCC FCTxxxT
VIN = GND FCT2xxxT
—
—
3.0
1.2
6.0(5)
3.4(5)
Outputs Open
fi = 2.5MHz
50% Duty Cycle
VIN = 3.4
FCTxxxT
—
—
5.0
3.2
14.0(5)
11.4(5)
OE = T/R = GND
VIN = GND FCT2xxxT
Eight Bits Toggling
2539 tbl 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. 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 (fCP/2 + fiNi)
ICC = Quiescent Current
∆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)
fi = Input Frequency
Ni = Number of Inputs at fi
All currents are in milliamps and all frequencies are in megahertz.
6.9
4
IDT54/74FCT245T/AT/CT/DT - 2245T/AT/CT, IDT54/74FCT640T/AT/CT, IDT54/74FCT645T/AT/CT/DT
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
FCT245T
FCT245AT
FCT2245T
FCT2245AT
Com'l.
Mil.
Com'l.
Mil.
Symbol
Parameter
Propagation Delay
A to B, B to A
Conditions(1)
= 50 pF
= 500
Min.(2) Max. Min (2)
.
Max. Min (2)
.
Max. Min.(2) Max. Unit
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPZH
tPZL
tPHZ
tPLZ
C
R
L
1.5
1.5
1.5
1.5
1.5
7.0
9.5
7.5
9.5
7.5
1.5
1.5
1.5
1.5
1.5
7.5
1.5
4.6
6.2
5.0
6.2
5.0
1.5
1.5
1.5
1.5
1.5
4.9
6.5
6.0
6.5
6.0
ns
ns
ns
ns
L
Ω
Output Enable Time
OE to A or B
10.0
10.0
10.0
10.0
1.5
1.5
1.5
1.5
Output Disable Time
OE to A or B
Output Enable Time
T/R to A or B(3)
Output Disable Time
T/R to A or B(3)
ns
2534 tbl 09
FCT245CT
FCT2245CT
FCT245DT
Com'l.
Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Unit
Com'l.
Mil.
Mil.
Symbol
tPLH
tPHL
Parameter
Propagation Delay
A to B, B to A
Conditions(1)
CL = 50 pF
RL = 500Ω
1.5
1.5
1.5
1.5
1.5
4.1
5.8
4.8
5.8
4.8
1.5
1.5
1.5
1.5
1.5
4.5
6.2
5.2
6.2
5.2
1.5
1.5
1.5
1.5
1.5
3.8
5.0
4.3
5.0
4.3
—
—
—
—
—
—
—
—
—
—
ns
ns
ns
ns
tPZH
tPZL
tPHZ
tPLZ
tPZH
tPZL
tPHZ
tPLZ
Output Enable Time
OE to A or B
Output Disable Time
OE to A or B
Output Enable Time
T/R to A or B(3)
Output Disable Time
T/R to A or B(3)
ns
2534 tbl 10
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
FCT640T
Com'l. Mil.
Conditions(1) Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Unit
FCT640AT
FCT640CT
Com'l. Mil.
Com'l.
Mil.
Symbol
tPLH
Parameter
Propagation Delay
A to B, B to A
CL = 50 pF
2.0 7.0 2.0
8.0 1.5 5.0 1.5
5.3 1.5 4.4 1.5
6.5 1.5 5.8 1.5
6.0 1.5 4.8 1.5
6.5 1.5 5.8 1.5
6.0 1.5 4.8 1.5
4.7 ns
6.2 ns
5.2 ns
6.2 ns
5.2 ns
2534 tbl 11
tPHL
RL = 500Ω
tPZH
Output Enable Time
OE to A or B
2.0 13.0 2.0 16.0 1.5 6.2 1.5
2.0 10.0 2.0 12.0 1.5 5.0 1.5
2.0 13.0 2.0 16.0 1.5 6.2 1.5
2.0 10.0 2.0 12.0 1.5 5.0 1.5
tPZL
tPHZ
Output Disable Time
OE to A or B
tPLZ
tPZH
Output Enable Time
T/R to A or B(3)
tPZL
tPHZ
Output Disable Time
T/R to A or B(3)
tPLZ
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
3. This parameter is guaranteed but not tested.
6.9
5
IDT54/74FCT245T/AT/CT/DT - 2245T/AT/CT, IDT54/74FCT640T/AT/CT, IDT54/74FCT645T/AT/CT/DT
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
FCT645T
FCT645AT
Com'l.
Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Unit
Com'l.
Mil.
Mil.
Symbol
tPLH
tPHL
tPZH
tPZL
Parameter
Propagation Delay
A to B, B to A
Conditions(1)
CL = 50 pF
RL = 500Ω
1.5
1.5
1.5
1.5
1.5
9.5
1.5
1.5
1.5
1.5
1.5
11.0
12.0
13.0
12.0
13.0
1.5
1.5
1.5
1.5
1.5
4.6
6.2
5.0
6.2
5.0
1.5
1.5
1.5
1.5
1.5
4.9
6.5
6.0
6.5
6.0
ns
ns
ns
ns
Output Enable Time
OE to A or B
11.0
12.0
11.0
12.0
tPHZ
tPLZ
Output Disable Time
OE to A or B
tPZH
tPZL
Output Enable Time
T/R to A or B(3)
tPHZ
tPLZ
Output Disable Time
T/R to A or B(3)
ns
2534 tbl 12
FCT645CT
Com'l.
Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Unit
FCT645DT
Mil.
Com'l.
Mil.
Symbol
tPLH
tPHL
tPZH
tPZL
Parameter
Propagation Delay
A to B, B to A
Conditions(1)
CL = 50 pF
RL = 500Ω
1.5
1.5
1.5
1.5
1.5
4.1
5.8
4.8
5.8
4.8
1.5
1.5
1.5
1.5
1.5
4.5
6.2
5.2
6.2
5.2
1.5
1.5
1.5
1.5
1.5
3.8
5.0
4.3
5.0
4.3
—
—
—
—
—
—
—
—
—
—
ns
Output Enable Time
OE to A or B
ns
ns
tPHZ
tPLZ
Output Disable Time
OE to A or B
tPZH
tPZL
Output Enable Time
T/R to A or B(3)
ns
tPHZ
tPLZ
Output Disable Time
T/R to A or B(3)
ns
NOTES:
1. See test circuit and waveforms.
2534 tbl 13
2. Minimum limits are guaranteed but not tested on Propagation Delays.
3. This parameter is guaranteed but not tested.
6.9
6
IDT54/74FCT245T/AT/CT/DT - 2245T/AT/CT, IDT54/74FCT640T/AT/CT, IDT54/74FCT645T/AT/CT/DT
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
TEST CIRCUITS AND WAVEFORMS
TEST CIRCUITS FOR ALL OUTPUTS
SWITCH POSITION
Test
Switch
VCC
7.0V
Open Drain
Disable Low
Closed
500
Ω
Ω
Enable Low
VOUT
VIN
Open
All Other Tests
Pulse
Generator
D.U.T.
DEFINITIONS:
2534 lnk 14
50pF
CL= Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse
500
T
R
C
L
Generator.
2534 drw 04
SET-UP, HOLD AND RELEASE TIMES
PULSE WIDTH
3V
DATA
1.5V
0V
INPUT
LOW-HIGH-LOW
tH
t
t
SU
1.5V
PULSE
3V
1.5V
0V
TIMING
INPUT
ASYNCHRONOUS CONTROL
tW
t
REM
PRESET
CLEAR
ETC.
3V
1.5V
0V
HIGH-LOW-HIGH
PULSE
1.5V
SYNCHRONOUS CONTROL
3V
1.5V
0V
PRESET
CLEAR
CLOCK ENABLE
ETC.
2534 drw 06
SU
t
H
2534 drw 05
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
VOL
3V
1.5V
0V
t
PZH
tPHZ
OPPOSITE PHASE
INPUT TRANSITION
VOH
OUTPUT
NORMALLY
HIGH
SWITCH
OPEN
1.5V
0V
0V
2534 drw 07
2534 drw 08
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
6.9
7
IDT54/74FCT245T/AT/CT/DT - 2245T/AT/CT, IDT54/74FCT640T/AT/CT, IDT54/74FCT645T/AT/CT/DT
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
ORDERING INFORMATION
FCT
IDT
XX
X
X
X
X
Temperature
Range
Device
Type
Package Process
Family
Blank
B
Commercial
MIL-STD-883, Class B
P
Plastic DIP
D
CERDIP
SO
L
E
PY
Q
Small Outline IC
Leadless Chip Carrier
CERPACK
Shrink Small Outline Package
Quarter-size Small Outline Package
245T Non-Inverting Octal Bidirectional Transceiver
640T Inverting Octal Bidirectional Transceiver
645T Non-Inverting Octal Bidirectional Transceiver
245AT
640AT
645AT
245CT
640CT
645CT
245DT
645DT
Blank High Drive
2
Balanced Drive
54
74
–55
°C to +125°C
0
°
C to +70°C
2539 drw 09
6.9
8
相关型号：
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