3.3V CMOS OCTAL BUFFER/ DRIVER WITH 3-STATE OUTPUTS BUS-HOLD MICR

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3.3V CMOS OCTAL BUFFER/ DRIVER WITH 3-STATE OUTPUTS BUS-HOLD MICR

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IDT74ALVCH244 3.3V CMOS OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS
3.3V CMOS OCTAL BUFFER/ DRIVER WITH 3-STATE OUTPUTS BUS-HOLD
MICRON CMOS Technology Typical tSK(o) (Output Skew) 250ps 2000V MIL-STD-883, Method 3015; 200V using machine model 200pF, 3.3V 0.3V, Normal Range 2.7V 3.6V, Extended Range 2.5V 0.2V CMOS power levels (0.4µ typ. static) Rail-to-Rail output swing increased noise margin Available QSOP, SOIC, SSOP, TSSOP packages
IDT74ALVCH244
FEATURES:
DRIVE FEATURES:
High Output Drivers: ±24mA Suitable Heavy Loads
ALVCH244 octal buffer/driver built using advanced dual metal CMOS technology. ALVCH244 organized 4-bit line drivers with seperate output-enable (OE) inputs. When low, device passes data from inputs outputs. When high, outputs high-impedance state. ensure high-impedance state during power power down, should tied through pullup resistor; minimum value resistor determined current-sinking capability driver. ALVCH244 been designed with ±24mA output driver. This driver capable driving moderate heavy load while maintaining speed performance. ALVCH244 "bus-hold" which retains inputs' last state whenever input goes high impedance. This prevents floating inputs eliminates need pull-up/down resistors.
DESCRIPTION:
APPLICATIONS:
3.3V high speed systems 3.3V lower voltage computing systems
FUNCTIONAL BLOCK DIAGRAM
logo registered trademark Integrated Device Technology, Inc.
©1999 Integrated Device Technology, Inc.
MARCH 1999
DSC-4774/1
IDT74ALVCH244 3.3V CMOS OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS
CONFIGURATION
ABSOLUTE MAXIMUM RATINGS(1)
Symbol VTERM(2) VTERM(3) TSTG IOUT Description Terminal Voltage with Respect Terminal Voltage with Respect Storage Temperature Output Current Continuous Clamp Current, Continuous Clamp Current, Continuous Current through each -0.5 +4.6 -0.5 VCC+0.5 +150 ±100
Unit
NOTES: Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS cause permanent damage device. This stress rating only functional operation device these other conditions above those indicated operational sections this specification implied. Exposure absolute maximum rating conditions extended periods affect reliability. terminals. terminals except VCC.
QSOP/ SOIC/ SSOP/ TSSOP TOPVIEW
CAPACITANCE +25°C, 1.0MHz)
Symbol COUT CI/O Parameter(1) Input Capacitance Output Capacitance Port Capacitance Conditions VOUT Typ. Max. Unit
NOTE: applicable device type.
DESCRIPTION
Names Data Inputs(1) 3-State Outputs Description 3-State Output Enable Inputs (Active LOW)
NOTE: These pins have "Bus-Hold". other pins standard inputs, outputs, I/Os.
FUNCTION TABLE (EACH BUFFER)(1)
Inputs
NOTE: HIGH Voltage Level Voltage Level Don't Care High Impedance
Outputs
IDT74ALVCH244 3.3V CMOS OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS
ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: Operating Condition: -40°C +85°C
Symbol IOZH IOZL ICCL ICCH ICCZ Parameter Input HIGH Voltage Level Input Voltage Level Input HIGH Current Input Current High Impedance Output Current (3-State Output pins) Clamp Diode Voltage Input Hysteresis Quiescent Power Supply Current 2.3V, -18mA 3.3V 3.6V input 0.6V, other inputs 2.3V 2.7V 2.7V 3.6V 2.3V 2.7V 2.7V 3.6V 3.6V 3.6V 3.6V Test Conditions Min. Typ.(1) -0.7 Max. -1.2 Unit
Quiescent Power Supply Current Variation
NOTE: Typical values 3.3V, +25°C ambient.
BUS-HOLD CHARACTERISTICS
Symbol IBHH IBHL IBHH IBHL IBHHO IBHLO
NOTES: Pins with Bus-Hold identified description. Typical values 3.3V, +25°C ambient.
Parameter(1) Bus-Hold Input Sustain Current Bus-Hold Input Sustain Current Bus-Hold Input Overdrive Current 2.3V 3.6V
Test Conditions 0.8V 1.7V 0.7V 3.6V
Min.
Typ.(2)
Max. ±500
Unit
IDT74ALVCH244 3.3V CMOS OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS
OUTPUT DRIVE CHARACTERISTICS
Symbol Parameter Output HIGH Voltage 2.3V 2.3V 2.7V Output Voltage 2.3V 3.6V 2.3V 2.7V 24mA 0.1mA 12mA 12mA 24mA Test Conditions(1) 2.3V 3.6V 0.1mA 12mA Min. Max. 0.55 Unit
NOTE: must within min. max. range shown ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE table appropriate range. 40°C 85°C.
OPERATING CHARACTERISTICS, 25°C
2.5V 0.2V Symbol Parameter Power Dissipation Capacitance Outputs enabled Power Dissipation Capacitance Outputs disabled Test Conditions 0pF, 10Mhz Typical 3.3V 0.3V Typical Unit
SWITCHING CHARACTERISTICS(1)
2.5V 0.2V Symbol tPLH tPHL tPZH tPZL tPHZ tPLZ tSK(O) Parameter Propagation Delay Output Enable Time Output Disable Time Output Skew(2) Min. Max. 2.7V Min. Max. 3.3V 0.3V Min. Max. Unit
NOTES: TEST CIRCUITS WAVEFORMS. 40°C 85°C. Skew between outputs same package switching same direction.
IDT74ALVCH244 3.3V CMOS OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS
TEST CIRCUITS WAVEFORMS TEST CONDITIONS
Symbol VLOAD VCC(1)= 3.3V±0.3V VCC(1)= 2.7V VCC(2)= 2.5V±0.2V Unit
SAME PHASE INPUT TRANSITION tPLH OUTPUT tPLH OPPOSITE PHASE INPUT TRANSITION tPHL tPHL
ALVC Link
Propagation Delay
DISABLE
Pulse(1, Generator D.U.T.
ALVC Link
VLOAD Open VOUT CONTROL INPUT tPZL OUTPUT SWITCH NORMALLY CLOSED tPZH OUTPUT SWITCH NORMALLY OPEN HIGH VLOAD/2 tPHZ tPLZ ENABLE VLOAD/2
ALVC Link
Test Circuit Outputs
DEFINITIONS: Load capacitance: includes probe capacitance. Termination resistance: should equal ZOUT Pulse Generator. NOTES: Pulse Generator Pulses: Rate 10MHz; 2.5ns; 2.5ns. Pulse Generator Pulses: Rate 10MHz; 2ns; 2ns.
Enable Disable Times
SWITCH POSITION
Test Open Drain Disable Enable Disable High Enable High Other Tests Switch VLOAD Open
DATA INPUT TIMING INPUT ASYNCHRONOUS CONTROL SYNCHRONOUS CONTROL
tREM
ALVC Link
Set-up, Hold, Release Times
INPUT
tPLH1
tPHL1
OUTPUT
LOW-HIGH-LOW PULSE HIGH-LOW-HIGH PULSE
OUTPUT tPLH2 tPHL2
ALVC Link
Pulse Width
ALVC Link
tSK(x) tPLH2 tPLH1 tPHL2 tPHL1
Output Skew tSK(X)
NOTES: tSK(o) OUTPUT1 OUTPUT2 outputs. tSK(b) OUTPUT1 OUTPUT2 same bank.
IDT74ALVCH244 3.3V CMOS OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS
ORDERING INFORMATION
ALVC Bus-Hold Temp. Range Device Type Package
Small Outline Shrink Small Outline Package Quarter-size Small Outline Package Thin Shrink Small Outline Package Octal Buffer/Driver With 3-State Outputs, ±24mA
Bus-hold -40°C +85°C
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3.3V CMOS OCTAL BUFFER/ DRIVER WITH 3-STATE OUTPUTS BUS-HOLD MICR

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