IDT74FCT2244ATPG [ETC]
Dual 4-Bit Non-Inverting Buffer/Driver ; 双4位非反相缓冲器/驱动器\n
| 型号： | IDT74FCT2244ATPG |
| 厂家： | 
ETC |
| 描述： | Dual 4-Bit Non-Inverting Buffer/Driver
|
| 文件： | 总6页 (文件大小：113K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
FAST CMOS OCTAL
BUFFER/LINE
DRIVER
IDT74FCT2244T/AT/CT
DESCRIPTION:
FEATURES:
−
−
−
Low input and output leakage ≤1µA (max.)
CMOS power levels
True TTL input and output compatibility
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.
•
•
VOH = 3.3V (typ.)
VOL = 0.3V (typ.)
TheFCT2244Thasbalancedoutputdrivewithcurrentlimitingresistors.
This offers lowgroundbounce,minimalundershoot,andcontrolledoutput
falltimes,reducingthe needforexternalseries terminatingresistors. The
FCT2244T is a plug-in replacement for the FCT244T.
−
−
−
−
−
Meets or exceeds JEDEC standard 18 specifications
Std., A, and C speed grades
Resistor outputs -15mA IOH, 12mA IOL
Reduced system switching noise
Available in SOIC, SSOP, QSOP, and TSSOP packages
FUNCTIONALBLOCKDIAGRAM
OEA
OEB
OA0
DB0
DA0
OB0
DA1
OB1
DA2
OB2
DA3
OB3
OA1
DB1
OA2
DB2
OA3
DB3
INDUSTRIAL TEMPERATURE RANGE
MAY 2001
1
c
2001 Integrated Device Technology, Inc.
DSC-5587/-
IDT74FCT2244T/AT/CT
FASTCMOSOCTALBUFFER/LINEDRIVER
INDUSTRIALTEMPERATURERANGE
ABSOLUTE MAXIMUM RATINGS(1)
PINCONFIGURATION
Symbol
Rating
Max.
Unit
(2)
20
1
VTERM
Terminal Voltage with Respect to GND
–0.5 to +7
V
OEA
DA0
VCC
OEB
OA0
DB0
OA1
(3)
VTERM
Terminal Voltage with Respect to GND –0.5 to VCC+0.5
V
19
18
17
2
3
TSTG
IOUT
Storage Temperature
DC Output Current
–65 to +150
–60 to +120
°C
OB0
DA1
OB1
DA2
OB2
DA3
mA
8T-link
4
NOTES:
SO20-2
SO20-7
SO20-8
SO20-9
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
16
15
14
13
12
11
5
6
DB1
OA2
DB2
7
rating conditions for extended periods may affect reliability.
terminal voltage may exceed Vcc by +0.5V unless otherwise noted.
No
8
2. Inputs and Vcc terminals only.
3. Outputs and I/O terminals only.
9
OA3
DB3
OB3
GND
10
O
CAPACITANCE
(TA = +25 C, f = 1.0MHz)
Symbol
Parameter(1)
Conditions
Typ.
Max. Unit
SOIC/ SSOP/ QSOP/ TSSOP
TOP VIEW
CIN
Input Capacitance
VIN = 0V
6
10
12
pF
COUT
Output Capacitance
VOUT = 0V
8
pF
8T-link
NOTE:
1. This parameter is measured at characterization but not tested.
PIN DESCRIPTION
Pin Names
Description
OEA, OEB
3–State Output Enable Inputs (Active LOW)
Dxx
Oxx
Inputs
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
L = LOW Voltage Level
X = Don’t Care
Z = High-Impedance
2
IDT74FCT2244T/AT/CT
FASTCMOSOCTALBUFFER/LINEDRIVER
INDUSTRIALTEMPERATURERANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = -40°C to +85°C, VCC = 5.0V ± 5%
Symbol
Parameter
Input HIGH Level
Test Conditions(1)
Min.
Typ.(2) Max.
Unit
VIH
Guaranteed Logic HIGH Level
2
—
—
—
0.8
±1
±1
±1
±1
±1
–1.2
—
1
V
VIL
IIH
Input LOW Level
Guaranteed Logic LOW Level
VCC = Max.
—
—
—
—
—
—
—
—
—
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
VI = 2.7V
VI = 0.5V
VO = 2.7V
VO = 0.5V
—
µA
IIL
—
IOZH
IOZL
II
VCC = Max.
—
µA
—
VCC = Max., VI = VCC (Max.)
VCC = Min., IIN = –18mA
—
µA
V
VIK
VH
ICC
–0.7
200
0.01
—
mV
mA
Quiescent Power Supply Current
VCC = Max., VIN =
VCC
GND or
OUTPUT DRIVE CHARACTERISTICS
Symbol
Parameter
Output LOW Current
Test Conditions(1)
VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V (3)
VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V (3)
Min.
Typ.(2) Max.
Unit
IODL
16
48
–48
3.3
—
—
—
mA
IODH
VOH
Output HIGH Current
Output HIGH Voltage
–16
2.4
mA
V
VCC = Min.
IOH = –15mA
VIN = VIH or VIL
VCC = Min.
VOL
Output LOW Voltage
IOL = 12mA
—
0.3
0.5
V
VIN = VIH or VIL
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 and maximum loading.
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.
3
IDT74FCT2244T/AT/CT
FASTCMOSOCTALBUFFER/LINEDRIVER
INDUSTRIALTEMPERATURERANGE
POWER SUPPLY CHARACTERISTICS
Symbol
Parameter
Quiescent Power Supply Current
TTL Inputs HIGH
Test Conditions(1)
Min.
Typ.(2) Max.
Unit
∆ICC
VCC = Max.
—
0.5
2
mA
(3)
VIN = 3.4V
ICCD
Dynamic Power Supply Current(4)
VCC = Max.
Outputs Open
VIN = VCC
—
0.06
0.12
mA/
MHz
VIN = GND
OEA OEB
=
= GND
One Input Toggling
50% Duty Cycle
VCC = Max.
IC
Total Power Supply Current(6)
VIN = VCC
—
—
—
—
0.6
0.9
1.2
3.2
2.2
3.2
mA
Outputs Open
fi = 10MHz
VIN = GND
50% Duty Cycle
VIN = 3.4
VIN = GND
OEA OEB
=
= GND
One Bit Toggling
VCC = Max.
VIN = VCC
3.4(5)
11.4(5)
Outputs Open
fi = 2.5MHz
VIN = GND
50% Duty Cycle
VIN = 3.4
OEA OEB
VIN = GND
=
= GND
Eight Bits Toggling
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.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
FCT2244T
FCT2244AT
FCT2244CT
Condition(1)
CL = 50pF
RL = 500Ω
Min.
Max.
Min.
Max.
Min.
Max.
(2)
(2)
(2)
Symbol
tPLH
Parameter
Propagation Delay
DN to ON
Unit
1.5
1.5
1.5
6.5
8
1.5
1.5
1.5
4.8
1.5
1.5
1.5
4.1
ns
ns
ns
tPHL
tPZH
Output Enable Time
6.2
5.6
5.8
5.2
tPZL
tPHZ
Output Disable Time
7
tPLZ
NOTES:
1. See Test Circuit and Waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
4
IDT74FCT2244T/AT/CT
FASTCMOSOCTALBUFFER/LINEDRIVER
INDUSTRIALTEMPERATURERANGE
TESTCIRCUITSANDWAVEFORMS
SWITCH POSITION
TEST CIRCUITS FOR ALL OUTPUTS
Test
Switch
Closed
Open
V CC
7.0V
Open Drain
Disable Low
Enable Low
All Other Tests
500Ω
500Ω
V OUT
VIN
Pulse
D.U.T.
Generator
8-link
50pF
DEFINITIONS:
T
R
L
C
CL = Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse
Generator.
Octal link
PULSEWIDTH
SET-UP, HOLD, AND RELEASE TIMES
3V
1.5V
0V
DATA
INPUT
LOW-HIGH-LOW
tH
tSU
1.5V
PULSE
3V
1.5V
0V
TIMING
INPUT
tW
ASYNCHRONOUS CONTROL
tREM
PRESET
3V
CLEAR
ETC.
1.5V
0V
HIGH-LOW-HIGH
PULSE
1.5V
SYNCHRONOUS CONTROL
PRESET
3V
1.5V
0V
Octal link
CLEAR
CLOCK ENABLE
ETC.
tSU
tH
Octal link
PROPAGATIONDELAY
ENABLEANDDISABLETIMES
ENABLE
DISABLE
3V
3V
SAME PHASE
INPUT TRANSITION
1.5V
0V
CONTROL
INPUT
1.5V
0V
tPLH
tPHL
tPHL
tPZL
tPLZ
VOH
OUTPUT
3.5V
1.5V
3.5V
VOL
1.5V
VOL
OUTPUT
NORMALLY
LOW
SWITCH
CLOSED
tPLH
0.3V
0.3V
3V
tPZH
tPHZ
OPPOSITE PHASE
INPUT TRANSITION
1.5V
0V
VOH
OUTPUT
NORMALLY
HIGH
SWITCH
OPEN
1.5V
0V
Octal link
0V
Octal link
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
IDT74FCT2244T/AT/CT
FASTCMOSOCTALBUFFER/LINEDRIVER
INDUSTRIALTEMPERATURERANGE
ORDERINGINFORMATION
XXXX
XX
IDT
XX
FCT
Package
Device Type
Temp. Range
SO
PY
Q
Small Outline IC (SO20-2)
Shrink Small Outline Package (SO20-7)
Quarter-size Small Outline Package (SO20-8)
Thin Shrink Small Outline Package (SO20-9)
PG
Fast CMOS Octal Buffer/Line Driver
2244T
2244AT
2244CT
74
– 40°C to +85°C
CORPORATE HEADQUARTERS
2975StenderWay
Santa Clara, CA 95054
for SALES:
800-345-7015 or 408-727-6116
fax: 408-492-8674
www.idt.com*
*To search for sales office near you, please click the sales button found on our home page or dial the 800# above and press 2.
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
6
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