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IDT74FCT540AT/CT FAST CMOS OCTAL BUFFER/LINE DRIVER
INDUSTRIAL TEMPERATURE RANGE
FAST CMOS OCTAL BUFFER/LINE DRIVER
IDT74FCT540AT/CT
FEATURES:
- - - - - - - - Low input and output leakage 1 A (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 A and C speed grades High drive outputs (-15mA IOH, 64mA IOL) Power off disable outputs permit "live insertion" Available in SOIC, SSOP, and QSOP packages
DESCRIPTION:
The IDT octal buffer/line driver is built using an advanced dual metal CMOS technology. The FCT540T is similar in function to the FCT240T, except that the inputs and outputs are on opposite sides of the package. This pinout arrangement makes these devices especially useful as output ports for microprocessors and as backplane drivers, allowing ease of layout and greater board density.
FUNCTIONAL BLOCK DIAGRAM
OEA
OEB
D0 D1 D2 D3 D4 D5 D6 D7
O0 O1 O2 O3 O4 O5 O6 O7
INDUSTRIAL TEMPERATURE RANGE
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c 1999 Integrated Device Technology, Inc.
AUGUST 2000
DSC-5588/-
IDT74FCT540AT/CT FAST CMOS OCTAL BUFFER/LINE DRIVER
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
OEA D0 D1 D2 D3 D4 D5 D6 D7 GND 1 2 3 4 5 20 19 18 17 VCC OEB O0 O1 O2 O3 O4 O5 O6 O7
ABSOLUTE MAXIMUM RATINGS(1)
Symbol VTERM(2) VTERM(3) TSTG IOUT Rating Terminal Voltage with Respect to GND Terminal Voltage with Respect to GND Storage Temperature DC Output Current Max. -0.5 to +7 -0.5 to VCC+0.5 -65 to +150 -60 to +120 Unit V V C mA
8T-link
SO20-2 16 SO20-7 6 SO20-8 15 14 7 8 9 10 13 12 11
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. 2. Inputs and Vcc terminals only. 3. Outputs and I/O terminals only.
CAPACITANCE (TA = +25OC, f = 1.0MHz)
SOIC/ SSOP/ QSOP TOP VIEW
Symbol CIN COUT Parameter(1) Input Capacitance Output Capacitance Conditions VIN = 0V VOUT = 0V Typ. 6 8 Max. 10 12 Unit pF pF
8T-link
NOTE: 1. This parameter is measured at characterization but not tested.
PIN DESCRIPTION
Pin Names OEA, OEB Dx Ox Description 3-State Output Enable Inputs (Active LOW) Inputs Outputs
FUNCTION TABLE
OEA L L H Inputs OEB L L H
(1)
D L H X Outputs
H
L Z
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care Z = High-Impedance
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IDT74FCT540AT/CT FAST CMOS OCTAL BUFFER/LINE DRIVER
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: Industrial: TA = -40C to +85C, VCC = 5.0V 5%
Symbol VIH VIL IIH IIL IOZH IOZL II VIK VH ICC Parameter Input HIGH Level Input LOW Level 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 Quiescent Power Supply Current VCC = Max., VI = VCC (Max.) VCC = Min., IIN = -18mA -- VCC = Max., VIN = GND or VCC VCC = Max. Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max. VI = 2.7V VI = 0.5V VO = 2.7V VO = 0.5V Min. 2 -- -- -- -- -- -- -- -- -- Typ.(2) -- -- -- -- -- -- -- -0.7 200 0.01 Max. -- 0.8 1 1 1 1 1 -1.2 -- 1 A V mV mA A Unit V V A
OUTPUT DRIVE CHARACTERISTICS
Symbol VOH VOL IOS Parameter Output HIGH Voltage Output LOW Voltage Short Circuit Current VCC = Min. VIN = VIH or VIL VCC = Min. VIN = VIH or VIL VCC = Max, VO = GND (3) Test Conditions(1) IOH = -8mA IOH = -15mA IOL = 64mA Min. 2.4 2 -- -60 Typ.(2) 3.3 3 0.3 -120 Max. -- -- 0.55 -225 V mA Unit V
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, +25C 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 thie parameter is 5A at TA = -55C.
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IDT74FCT540AT/CT FAST CMOS OCTAL BUFFER/LINE DRIVER
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Symbol ICC ICCD Parameter Quiescent Power Supply Current TTL Inputs HIGH Dynamic Power Supply Current(4) Test Conditions(1) VCC = Max. VIN = 3.4V(3) VCC = Max. Outputs Open
OEA = OEB = GND
Min. -- --
Typ.(2) 0.5 0.15
Max. 2 0.25
Unit mA mA/ MHz
VIN = VCC VIN = GND
IC
Total Power Supply Current(6)
One Input Toggling 50% Duty Cycle VCC = Max. Outputs Open fi = 10MHz 50% Duty Cycle
OEA = OEB = GND
VIN = VCC VIN = GND VIN = 3.4 VIN = GND VIN = VCC VIN = GND VIN = 3.4 VIN = GND
--
1.5
3.5
mA
--
1.8
4.5
One Bit Toggling VCC = Max. Outputs Open fi = 2.5MHz 50% Duty Cycle
OEA = OEB = GND
--
3
6(5)
--
5
14(5)
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, +25C 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
FCT540AT Symbol tPLH tPHL tPZH tPZL tPHZ tPLZ Parameter Propagation Delay DN to ON Output Enable Time Output Disable Time Condition(1) CL = 50pF RL = 500 Min.(2) 1.5 1.5 1.5 Max. 4.8 6.2 5.6 Min.(2) 1.5 1.5 1.5 FCT540CT Max. 4.3 5.8 5.2 Unit ns ns ns
NOTES: 1. See Test Circuit and Waveforms. 2. Minimum limits are guaranteed but not tested on Propagation Delays.
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IDT74FCT540AT/CT FAST CMOS OCTAL BUFFER/LINE DRIVER
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS TEST CIRCUITS FOR ALL OUTPUTS
V CC 7.0V 500 V IN Pulse Generator D.U.T. 50pF R
T
SWITCH POSITION
Test Open Drain Disable Low Enable Low All Other Tests Open
8-link
Switch Closed
V OUT
500 C
L
DEFINITIONS: CL = Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
O ctal lin k
SET-UP, HOLD, AND RELEASE TIMES
DATA INPUT tSU TIM ING INPUT ASYNCHRONOUS C ONTROL PRES ET CLEAR ETC. SYNCHRO NOUS CONTRO L PRES ET CLEAR CLOCK ENABLE ETC. tREM tH 3V 1.5V 0V 3V 1.5V 0V 3V 1.5V 0V 3V 1.5V 0V
O ctal lin k
PULSE WIDTH
LO W -HIGH-LOW PULSE tW HIGH-LOW -HIGH PULSE
O ctal lin k
1.5V
1.5V
tSU
tH
PROPAGATION DELAY
SAM E PHASE INPUT TRANSITION tPLH OUTPUT tPLH OPPOSITE P HASE INPUT TRANSITION tPHL tPHL 3V 1.5V 0V VOH 1.5V VOL 3V 1.5V 0V
O ctal lin k
ENABLE AND DISABLE TIMES
ENAB LE DISA BLE 3V CO NTROL INPUT tPZL OUTPUT NO RM A LLY LO W SW ITCH CLOSE D tPZH OUTPUT NO RM A LLY HIGH SW ITCH OPEN 3.5V 1.5V 0.3V tPHZ 0.3V 1.5V 0V 0V
O ctal lin k
1.5V tPLZ 0V 3.5V VOL VOH
NOTES: 1. Diagram shown for input Control Enable-LOW and input Control DisableHIGH 2. Pulse Generator for All Pulses: Rate 1.0MHz; tF 2.5ns; tR 2.5ns
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IDT74FCT540AT/CT FAST CMOS OCTAL BUFFER/LINE DRIVER
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDT XX FCT X Device Type X Package Temperature Range
SO PY Q
Small Outline IC (SO20-2) Shrink Small Outline Package (SO20-7) Quarter-size Small Outline Package (SO20-8)
540AT 540CT
Fast CMOS Octal Buffer/Line Driver
74
- 40C to +85C
CORPORATE HEADQUARTERS 2975 Stender Way 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.
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