74FCT245CTPYG [IDT]
SSOP-20, Tube;
| 型号： | 74FCT245CTPYG |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | SSOP-20, Tube |
| 文件： | 总8页 (文件大小：193K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
FAST CMOS OCTAL
IDT54/74FCT245T/AT/CT
BIDIRECTIONAL
TRANSCEIVER
FEATURES:
DESCRIPTION:
• Std., A, and C grades
TheIDToctalbidirectionaltransceiversarebuiltusinganadvanceddual
• Low input and output leakage ≤1µA (max.)
• CMOS power levels
• True TTL input and output compatibility:
– VOH = 3.3V (typ.)
metalCMOStechnology. TheFCT245Tisdesignedforasynchronoustwo-
waycommunicationbetweendatabuses. Thetransmit/receive(T/R)input
determinesthedirectionofdataflowthroughthebidirectionaltransceiver.
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.
– VOL = 0.3V (typ.)
• High Drive outputs (-15mA IOH, 64mA IOL)
• Meets or exceeds JEDEC standard 18 specifications
• Military product compliant to MIL-STD-883, Class B and DESC
listed (dual marked)
• Power off disable outputs permit "live insertion"
• Available in the following packages:
– Industrial: SOIC, SSOP, QSOP, TSSOP
– Military: CERDIP, LCC
FUNCTIONALBLOCKDIAGRAM
T/R
OE
0
A
0
B
1
A
1
B
2
A
2
B
3
A
3
B
4
A
4
B
5
A
5
B
6
A
6
B
7
A
B7
IDTandtheIDTlogoareregisteredtrademarksofIntegratedDeviceTechnology,Inc.
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
DECEMBER 2016
1
DSC-5510/7
IDT54/74FCT245T/AT/CT
FASTCMOSOCTALBIDIRECTIONALTRANSCEIVER
MILITARYANDINDUSTRIALTEMPERATURERANGES
PINCONFIGURATION
V
CC
INDEX
20
19
18
17
16
15
14
13
12
11
1
T/R
OE
A0
A1
A2
A3
2
3
4
3
2
20 19
18
B
B
B
B
0
1
2
3
1
4
5
6
7
8
A
2
3
4
B0
B1
B2
B3
B4
17
16
15
14
A
5
A
A
A
A4
A5
A6
A7
6
5
6
B
B
B
B
4
5
6
7
7
9
10 11 12 13
8
9
GND
10
LCC
TOP VIEW
CERDIP/ SOIC/ SSOP/ QSOP/ TSSOP
TOP VIEW
ABSOLUTEMAXIMUMRATINGS(1)
PINDESCRIPTION
Symbol
Description
Max
Unit
V
Pin Names
Description
(2)
VTERM
Terminal Voltage with Respect to GND
–0.5 to +7
OE
T/R
Output Enable Inputs (Active LOW)
Transmit/Recieve Input
(3)
VTERM
Terminal Voltage with Respect to GND –0.5 to VCC+0.5
V
TSTG
IOUT
Storage Temperature
DC Output Current
–65 to +150
–60 to +120
°C
mA
A0 - A7
B0 - B7
Side A Inputs or 3-State Outputs
Side B Inputs or 3-State Outputs
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. No terminal voltage may exceed
Vcc by +0.5V unless otherwise noted.
FUNCTIONTABLE(1)
Inputs
2. Inputs and Vcc terminals only.
3. Output and I/O terminals only.
OE
L
T/R
L
Outputs
Bus B Data to Bus A
Bus A Data to Bus B
HighZState
L
H
H
X
CAPACITANCE (TA = +25°C, F = 1.0MHz)
NOTE:
1. H = HIGH Voltage Level
X = Don’t Care
L = LOW Voltage Level
Z = High Impedance
Symbol
Parameter(1)
Input Capacitance
Output Capacitance
Conditions
Typ.
Max. Unit
CIN
VIN = 0V
6
8
10
12
pF
pF
COUT
VOUT = 0V
NOTE:
1. This parameter is measured at characterization but not tested.
2
IDT54/74FCT245T/AT/CT
MILITARYANDINDUSTRIALTEMPERATURERANGES
FASTCMOSOCTALBIDIRECTIONALTRANSCEIVER
DCELECTRICALCHARACTERISTICSOVEROPERATINGRANGE
FollowingConditionsApplyUnlessOtherwiseSpecified:
Industrial: TA = –40°C to +85°C, VCC = 5.0V ±5%; Military: TA = –55°C to +125°C, VCC = 5.0V ±10%
Symbol
VIH
Parameter
Input HIGH Level
Test Conditions(1)
Guaranteed Logic HIGH Level
Min.
2
Typ.(2)
—
Max.
—
0.8
1
Unit
V
VIL
Input LOW Level
Guaranteed Logic LOW Level
VCC = Max.
—
—
—
—
—
—
—
—
—
—
V
IIH
Input HIGH Current(4)
Input LOW Current(4)
High Impedance Output Current
(3-State output pins)(4)
Input HIGH Current(4)
ClampDiodeVoltage
Input Hysteresis
VI = 2.7V
VI = 0.5V
VO = 2.7V
VO = 0.5V
—
µA
µA
µA
IIL
VCC = Max.
—
1
IOZH
IOZL
VCC = Max
—
1
—
1
II
VCC = Max., VI = VCC (Max.)
VCC = Min, IIN = -18mA
—
1
µA
V
VIK
VH
ICC
–0.7
200
0.01
–1.2
—
1
—
mV
mA
Quiescent Power Supply Current
VCC = Max., VIN = GND or VCC
OUTPUTDRIVECHARACTERISTICS
Symbol
Parameter
Test Conditions(1)
Min.
Typ.(2)
Max.
Unit
VOH
Output HIGH Voltage
VCC = Min
VIN = VIH or VIL
IOH = –6mA MIL
IOH = –8mA IND
IOH = –12mA MIL
IOH = –15mA IND
IOL = 48mA MIL
IOL = 64mA IND
2.4
3.3
—
V
2
3
—
VOL
IOS
OutputLOWVoltage
Short Circuit Current
VCC = Min
VIN = VIH or VIL
VCC = Max., VO = GND(3)
—
0.3
0.55
–225
V
–60
–120
mA
NOTES:
1. For conditions shown as Min. or Max., 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. The test limit for this parameter is ±5µA at TA = –55°C.
3
IDT54/74FCT245T/AT/CT
FASTCMOSOCTALBIDIRECTIONALTRANSCEIVER
MILITARYANDINDUSTRIALTEMPERATURERANGES
POWERSUPPLYCHARACTERISTICS
Symbol
Parameter
Test Conditions(1)
Min.
Typ.(2)
Max.
Unit
ΔICC
Quiescent Power Supply Current
TTL Inputs HIGH
VCC = Max.
VIN = 3.4V(3)
—
0.5
2
mA
ICCD
Dynamic Power Supply
Current(4)
VCC = Max.
Outputs Open
VIN = VCC
VIN = GND
—
0.15
0.25
mA/
MHz
OE = T/R = GND
One Input Toggling
50% Duty Cycle
IC
Total Power Supply Current(6)
VCC = Max.
Outputs Open
fi = 10MHz
VIN = VCC
VIN = GND
—
—
—
—
1.5
1.8
3
3.5
4.5
mA
50% Duty Cycle
OE = T/R = GND
One Bit Toggling
VIN = 3.4V
VIN = GND
(5)
6
VCC = Max.
Outputs Open
fi = 2.5MHz
VIN = VCC
VIN = GND
50% Duty Cycle
OE = T/R = GND
Eight Bits Toggling
VIN = 3.4V
VIN = GND
5
14(5)
NOTES:
1. For conditions shown as Min. or Max., 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 ΔICC formula. These limits are guaranteed but not tested.
6. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ΔICC DHNT + ICCD (fCP/2+ fiNi)
ICC = Quiescent Current
ΔICC = 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 = Output Frequency
Ni = Number of Outputs at fi
All currents are in milliamps and all frequencies are in megahertz.
4
IDT54/74FCT245T/AT/CT
MILITARYANDINDUSTRIALTEMPERATURERANGES
FASTCMOSOCTALBIDIRECTIONALTRANSCEIVER
SWITCHINGCHARACTERISTICSOVEROPERATINGRANGE-INDUSTRIAL
74FCT245AT
74FCT245CT
Symbol
tPLH
Parameter
PropagationDelay
A to B, B to A
Condition(1)
CL = 50pF
RL = 500Ω
Min.(2)
Max.
Min.(2)
Max.
Unit
1.5
1.5
1.5
1.5
1.5
4.6
1.5
1.5
1.5
1.5
1.5
4.1
ns
tPHL
tPZH
tPZL
OutputEnableTime
OE to A or B
OutputDisableTime
6.2
5
5.8
4.8
5.8
4.8
ns
ns
ns
ns
tPHZ
tPLZ
OE to A or B
OutputEnableTime
T/R to A or B(3)
OutputDisableTime
T/R to A or B(3)
tPZH
tPZL
6.2
5
tPHZ
tPLZ
SWITCHINGCHARACTERISTICSOVEROPERATINGRANGE-MILITARY
54FCT245T
54FCT245AT
54FCT245CT
Symbol
tPLH
Parameter
PropagationDelay
A to B, B to A
Condition(1)
CL = 50pF
RL = 500Ω
Min.(2)
Max.
Min.(2)
Max.
Min.(2)
Max.
Unit
1.5
1.5
1.5
1.5
1.5
7.5
1.5
1.5
1.5
1.5
1.5
4.9
1.5
1.5
1.5
1.5
1.5
4.5
ns
tPHL
tPZH
tPZL
OutputEnableTime
OE to A or B
OutputDisableTime
10
10
10
10
6.5
6
6.2
5.2
6.2
5.2
ns
ns
ns
ns
tPHZ
tPLZ
OE to A or B
OutputEnableTime
T/R to A or B(3)
OutputDisableTime
T/R to A or B(3)
tPZH
tPZL
6.5
6
tPHZ
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.
5
IDT54/74FCT245T/AT/CT
FASTCMOSOCTALBIDIRECTIONALTRANSCEIVER
MILITARYANDINDUSTRIALTEMPERATURERANGES
TESTCIRCUITSANDWAVEFORMS
V
CC
SWITCHPOSITION
7.0V
Test
Switch
Closed
Open
500W
Open Drain
Disable Low
Enable Low
V
OUT
V
IN
Pulse
Generator
D.U.T
.
All Other Tests
50pF
500W
T
R
DEFINITIONS:
CL = Load capacitance: includes jig and probe capacitance.
L
C
RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
Octal Link
Test Circuits for All Outputs
3V
DATA
1.5V
0V
INPUT
LOW-HIGH-LOW
tH
tSU
1.5V
PULSE
3V
1.5V
0V
TIMING
INPUT
ASYNCHRONOUS CONTROL
tW
tREM
PRESET
CLEAR
ETC.
3V
1.5V
0V
HIGH-LOW-HIGH
PULSE
1.5V
SYNCHRONOUS CONTROL
PRESET
3V
1.5V
0V
CLEAR
tSU
tH
CLOCK ENABLE
ETC.
Pulse Width
Octal Link
Octal Link
Set-Up, Hold, and Release Times
ENABLE
DISABLE
3V
1.5V
0V
3V
SAME PHASE
CONTROL
INPUT
1.5V
0V
INPUT TRANSITION
t
PLH
t
PHL
PHL
t
PZL
tPLZ
VOH
OUTPUT
3.5V
1.5V
3.5V
1.5V
OUTPUT
NORMALLY
LOW
SWITCH
CLOSED
VOL
tPLH
t
0.3V
0.3V
VOL
3V
1.5V
0V
tPZH
tPHZ
OPPOSITE PHASE
INPUT TRANSITION
VOH
OUTPUT
NORMALLY
HIGH
SWITCH
OPEN
1.5V
0V
0V
Octal Link
Octal Link
Propagation Delay
Enable and Disable Times
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
IDT54/74FCT245T/AT/CT
MILITARYANDINDUSTRIALTEMPERATURERANGES
FASTCMOSOCTALBIDIRECTIONALTRANSCEIVER
ORDERINGINFORMATION
XXXX
XX
X
XX
FCT
X
X
Package
Process
Device Type
Temp. Range
Tube
Tape and Reel
Blank
8
Green
G
Blank
B
Industrial
MIL-STD-883, Class B
Industrial Options
Small Outline IC (PSG20)
SO
PY
Q
Shrink Small Outline Package (PYG20)
Quarter-size Small Outline Package (PCG20)
Thin Shrink Small Outline Package (PGG20)
PG
Military Options
D
L
CERDIP (CD20)
Leadless Chip Carrier (LC20)
245T
Fast CMOS Octal Bidirectional Transceiver
245AT
245CT
54
74
−55°C to +125°C
−40°C to +85°C
DatasheetDocumentHistory
09/29/2009
12/12/2016
Pg. 7
Pg. 7
Updated the ordering information by removing the "IDT" notation and non RoHS part.
UpdatedtheorderinginformationbyaddingdetailedpackageinformationandTape&Reel.
7
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