IDT74FCT2244AT_16 [IDT]
FAST CMOS OCTAL BUFFER/LINE DRIVER;型号: | IDT74FCT2244AT_16 |
厂家: | INTEGRATED DEVICE TECHNOLOGY |
描述: | FAST CMOS OCTAL BUFFER/LINE DRIVER 驱动 |
文件: | 总6页 (文件大小:80K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
FAST CMOS OCTAL
BUFFER/LINE DRIVER
IDT74FCT2244AT/CT
FEATURES:
• A and C grades
• 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
• Resistor outputs (-15mA IOH, 12mA IOL)
• Reduced system switching noise
• Available in SOIC and QSOP packages
DESCRIPTION:
The IDT octal buffer/line driver is built using an advanced dual metal
CMOS technology. The FCT2244T is designed to be employed as a
memory and address driver, clock driver, and bus-oriented transmitter/
receiver which provides improved board density.
TheFCT2244Thasbalancedoutputdrivewithcurrentlimitingresistors.
Thisofferslowgroundbounce, minimalundershoot, andcontrolledoutput
fall times, reducing the need for external series terminating resistors. The
FCT2244T is a plug-in replacement for the FCT244T.
FUNCTIONAL BLOCK DIAGRAM
OEA
OE
OA
DB
OA
DB
OA
DB
OA
DB
B
0
DA
OB
DA
OB
DA
OB
DA
OB
0
0
0
1
1
1
1
2
2
2
2
3
3
3
3
IDTandtheIDTlogoareregisteredtrademarksofIntegratedDeviceTechnology,Inc.
INDUSTRIAL TEMPERATURE RANGE
NOVEMBER 2016
1
© 2016 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice.
DSC-5587/11
IDT74FCT2244AT/CT
FASTCMOSOCTALBUFFER/LINEDRIVER
INDUSTRIALTEMPERATURERANGE
ABSOLUTE MAXIMUM RATINGS(1)
PIN CONFIGURATION
Symbol
Description
Max
Unit
V
(2)
VTERM
Terminal Voltage with Respect to GND
–0.5 to +7
(3)
20
19
18
17
16
15
14
13
12
11
1
OEA
VTERM
Terminal Voltage with Respect to GND –0.5 to VCC+0.5
V
VCC
OEB
OA0
DB0
OA1
TSTG
IOUT
Storage Temperature
DC Output Current
–65 to +150
–60 to +120
° C
mA
DA0
2
3
4
OB0
DA1
OB1
DA2
OB2
DA3
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.
5
6
DB1
OA2
DB2
2. Inputs and Vcc terminals only.
3. Output and I/O terminals only.
7
8
9
OA3
DB3
OB3
CAPACITANCE (TA = +25°C, F = 1.0MHz)
Symbol
Parameter(1)
Input Capacitance
Output Capacitance
Conditions
Typ.
Max. Unit
GND
10
CIN
VIN = 0V
6
8
10
12
pF
pF
COUT
VOUT = 0V
SOIC / QSOP
TOP VIEW
NOTE:
1. This parameter is measured at characterization but not tested.
PIN DESCRIPTION
Pin Names
OEA, OEB
Dxx
Description
3-State Output Enable Inputs (Active LOW)
Inputs
Oxx
Outputs
FUNCTION TABLE(1)
Inputs
OEA
L
OEB
L
D
L
Outputs
L
H
Z
L
L
H
X
H
H
NOTE:
1. H = HIGH Voltage Level
X = Don’t Care
L = LOW Voltage Level
Z = High Impedance
2
IDT74FCT2244AT/CT
FASTCMOSOCTALBUFFER/LINEDRIVER
INDUSTRIALTEMPERATURERANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
FollowingConditionsApplyUnlessOtherwiseSpecified:
Industrial: TA = –40°C to +85°C, VCC = 5.0V 5%
Symbol
VIH
VIL
Parameter
Input HIGH Level
Test Conditions(1)
Guaranteed Logic HIGH Level
Min.
2
Typ.(2)
—
Max.
—
0.8
1
Unit
V
Input LOW Level
Guaranteed Logic LOW Level
VCC = Max.
—
—
—
—
—
—
—
—
—
—
V
IIH
Input HIGH Current(4)
Input LOW Current(4)
VI = 2.7V
VI = 0.5V
VI = 2.7V
VI = 0.5V
—
µA
µA
µA
IIL
VCC = Max.
—
1
IOZH
IOZL
II
High Impedance Output Current
(3-State Output Pins)(4)
Input HIGH Current(4)
Clamp Diode Voltage
Input Hysteresis
VCC = Max.
—
1
—
1
VCC = Max., VI = VCC (Max.)
VCC = Min., IIN = –18mA
—
1
µA
V
VIK
VH
–0.7
200
0.01
–1.2
—
1
—
mV
mA
ICC
Quiescent Power Supply Current
VCC = Max.
VIN = GND or VCC
OUTPUT DRIVE CHARACTERISTICS
Symbol
Parameter
OutputLOWCurrent
Output HIGH Current
Output HIGH Voltage
Test Conditions(1)
Min.
16
Typ.(2)
48
Max.
—
Unit
mA
mA
V
IODL
IODH
VOH
VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V(3)
VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V(3)
-16
2.4
-48
—
VCC = Min
IOH = –15mA
3.3
—
VIN = VIH or VIL
VCC = Min
VOL
Output LOWVoltage
IOL = 12mA
—
0.3
0.5
V
VIN = VIH or VIL
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
IDT74FCT2244AT/CT
FASTCMOSOCTALBUFFER/LINEDRIVER
INDUSTRIALTEMPERATURERANGE
POWER SUPPLY CHARACTERISTICS
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
—
0.06
0.12
mA/
MHz
OEA or OEB = GND
One Input Toggling
50% Duty Cycle
IC
Total Power Supply Current(6)
VCC = Max.
Outputs Open
fi = 10MHz
VIN = VCC
VIN = GND
—
—
—
—
0.6
0.9
1.2
3.2
2.2
3.2
mA
50% Duty Cycle
OEA or OEB = GND
One Bit Toggling
VIN = 3.4V
VIN = GND
VCC = Max.
Outputs Open
fi = 2.5MHz
VIN = VCC
VIN = GND
3.4(5)
11.4(5)
50% Duty Cycle
OEA or OEB = GND
Four Bits Toggling
VIN = 3.4V
VIN = GND
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.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
74FCT2244AT
74FCT2244CT
Symbol
tPLH
Parameter
Condition(1)
CL = 50pF
RL = 500Ω
Min.(2)
Max.
Min.(2)
Max.
Unit
PropagationDelay
Dx to Ox
1.5
4.8
1.5
1.5
1.5
4.1
ns
tPHL
tPZH
OutputEnableTime
1.5
1.5
6.2
5.6
5.8
5.2
ns
ns
tPZL
tPHZ
OutputDisableTime
tPLZ
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
4
IDT74FCT2244AT/CT
INDUSTRIALTEMPERATURERANGE
FASTCMOSOCTALBUFFER/LINEDRIVER
TEST CIRCUITS AND WAVEFORMS
V
CC
SWITCH POSITION
Test
7.0V
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
INPUT
1.5V
0V
3V
1.5V
0V
LOW-HIGH-LOW
PULSE
t
H
t
SU
1.5V
TIMING
INPUT
tW
ASYNCHRONOUS CONTROL
PRESET
CLEAR
ETC.
SYNCHRONOUS CONTROL
t
REM
3V
1.5V
0V
HIGH-LOW-HIGH
PULSE
1.5V
3V
1.5V
0V
PRESET
CLEAR
CLOCK ENABLE
ETC.
tSU
tH
Pulse Width
Octal Link
Octal Link
Set-Up, Hold, and Release Times
ENABLE
DISABLE
3V
3V
SAME PHASE
INPUT TRANSITION
1.5V
0V
CONTROL
INPUT
1.5V
0V
t
PLH
t
PHL
PHL
t
PZL
tPLZ
VOH
OUTPUT
3.5V
1.5V
3.5V
1.5V
VOL
OUTPUT
NORMALLY
LOW
SWITCH
CLOSED
tPLH
t
0.3V
0.3V
VOL
3V
tPZH
tPHZ
OPPOSITE PHASE
INPUT TRANSITION
1.5V
0V
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.
5
IDT74FCT2244AT/CT
FASTCMOSOCTALBUFFER/LINEDRIVER
INDUSTRIALTEMPERATURERANGE
ORDERING INFORMATION
XXXX
XX
FCT
XX
X
X
Device
Type
Package
Temperature
Range
Tube
Tape and Reel
Blank
8
G
Green
SO
Q
Small Outline IC (PSG20)
Quarter-size Small Outline Package (PCG20)
2244AT
2244CT
Fast CMOS Octal Buffer/Line Driver
74
−40°C to +85°C
Datasheet Document History
09/28/2009 Pg. 6
09/26/2011 Pg. 2,6
11/26/2016 Pg. 6
Updated the ordering information by removing the "IDT" notation and non RoHS part.
Correct Outputs in Function Table. Updated ordering information to include tube or tray and tape & reel.
Updatedorderinginformationdiagramtemperaturesymbol,removedtrayandcreatedGreenoptioningreaterdetail.
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for SALES:
for Tech Support:
logichelp@idt.com
800-345-7015 or 408-284-8200
fax: 408-284-2775
www.idt.com
6
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