View IDT74LVC138A_296577.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

IDT74LVC138A 3.3V CMOS 3-LINE TO 8-LINE DECODER/DEMULTIPLEXER
INDUSTRIAL TEMPERATURE RANGE
3.3V CMOS 3-LINE TO 8-LINE DECODER/DEMULTIPLEXER WITH 5 VOLT TOLERANT I/O
* 0.5 MICRON CMOS Technology * ESD > 2000V per MIL-STD-883, Method 3015; > 200V using machine model (C = 200pF, R = 0) * VCC = 3.3V 0.3V, Normal Range * VCC = 2.7V to 3.6V, Extended Range * CMOS power levels (0.4 W typ. static) * Rail-to-Rail output swing for increased noise margin * All inputs, outputs, and I/Os are 5V tolerant * Supports hot insertion * Available in QSOP, SOIC, SSOP, and TSSOP packages
IDT74LVC138A
FEATURES:
DESCRIPTION:
DRIVE FEATURES: APPLICATIONS:
* High Output Drivers: 24mA * Reduced system switching noise
* 5V and 3.3V mixed voltage systems * Data communication and telecommunication systems
The LVC138A 3-line to 8-line decoder/demultiplexer is built using advanced dual metal CMOS technology. This device is designed for highperformance memory-decoding or data-routing applications requiring very short propagation delay times. In high performance memory systems, this decoder minimizes the effects of system decoding. When employed with high-speed memories utilizing a fast enable circuit, the delay times of these decoders and the enable time of the memory are usually less than the typical access time of the memory. This means that the effective system delay introduced by the decoder is negligible. The conditions at the binary-select inputs and the three enable inputs select one of eight output lines. Two active-low enable inputs and one activehigh enable input reduce the need for external gates or inverters when expanding. A 24-line decoder can be implemented without external inverters and a 32-line decoder requires only one inverter. An enable input can be used as a data input for demultiplexing applications. Inputs can be driven from either 3.3V or 5V devices. This feature allows the use of this device as a translator in a mixed 3.3V/5V supply system. The LVC138A has been designed with a 24mA output driver. This driver is capable of driving a moderate to heavy load while maintaining speed performance.
FUNCTIONAL BLOCK DIAGRAM
15
Y0 A Select Inputs B
3 1 14
Y1
2 13
Y2
12
C
11
Y3 Y4
10
Data Outputs
Y5
9
G1 Enable Inputs
6 7
Y6 Y7
4
G2A G2B
5
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
(c)1999 Integrated Device Technology, Inc.
AUGUST 1999
DSC-4722/1
IDT74LVC138A 3.3V CMOS 3-LINE TO 8-LINE DECODER/DEMULTIPLEXER
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
A B C G2A G2B G1 Y7 GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC Y0 Y1 Y2 Y3 Y4 Y5 Y6
ABSOLUTE MAXIMUM RATINGS(1)
Symbol VTERM TSTG IOUT IIK IOK ICC ISS Description Terminal Voltage with Respect to GND Storage Temperature DC Output Current Continuous Clamp Current, VI < 0 or VO < 0 Continuous Current through each VCC or GND Max -0.5 to +6.5 -65 to +150 -50 to +50 -50 100 Unit V C mA mA mA
NOTE: 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.
QSOP/ SOIC/ SSOP/ TSSOP TOP VIEW
PIN DESCRIPTION
Pin Names G1 G2A, G2B Yx A, B, C Input Enable Input Enables (Active LOW) Data Outputs Select Data Inputs Description
CAPACITANCE (TA = +25C, F = 1.0MHz)
Symbol CIN COUT CI/O Parameter(1) Input Capacitance Output Capacitance I/O Port Capacitance Conditions VIN = 0V VOUT = 0V VIN = 0V Typ. 4.5 5.5 6.5 Max. 6 8 8 Unit pF pF pF
NOTE: 1. As applicable to the device type.
FUNCTION TABLE(1)
Enable Inputs G1 X X L H H H H H H H H G2A H X X L L L L L L L L G2B X H X L L L L L L L L C X X X L L L L H H H H Select Inputs B X X X L L H H L L H H A X X X L H L H L H L H Y0 H H H L H H H H H H H Y1 H H H H L H H H H H H Y2 H H H H H L H H H H H H H H H H H L H H H H Outputs Y3 Y4 H H H H H H H L H H H Y5 H H H H H H H H L H H Y6 H H H H H H H H H L H Y7 H H H H H H H H H H L
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care
2
IDT74LVC138A 3.3V CMOS 3-LINE TO 8-LINE DECODER/DEMULTIPLEXER
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: Operating Condition: TA = -40C to +85C
Symbol VIH VIL IIH IIL IOZH IOZL IOFF VIK VH ICCL ICCH ICCZ ICC High Impedance Output Current (3-State Output pins) Input/Output Power Off Leakage Clamp Diode Voltage Input Hysteresis Quiescent Power Supply Current VCC = 0V, VIN or VO 5.5V VCC = 2.3V, IIN = -18mA VCC = 3.3V VCC = 3.6V, VIN = GND or VCC -- -- -- -- -- -0.7 100 -- 50 -1.2 -- 10 A V mV A VCC = 3.6V VO = 0 to 5.5V -- -- 10 A Parameter Input HIGH Voltage Level Input LOW Voltage Level Input Leakage Current VCC = 2.3V to 2.7V VCC = 2.7V to 3.6V VCC = 2.3V to 2.7V VCC = 2.7V to 3.6V VCC = 3.6V VI = 0 to 5.5V Test Conditions Min. 1.7 2 -- -- -- Typ.(1) -- -- -- -- -- Max. -- -- 0.7 0.8 5 A V Unit V
Quiescent Power Supply Current Variation
One input at VCC - 0.6V, other inputs at VCC or GND
--
--
500
A
NOTE: 1. Typical values are at VCC = 3.3V, +25C ambient.
OUTPUT DRIVE CHARACTERISTICS
Symbol VOH Parameter Output HIGH Voltage VCC = 2.3V VCC = 2.3V VCC = 2.7V VCC = 3V VCC = 3V VOL Output LOW Voltage VCC = 2.3V to 3.6V VCC = 2.3V VCC = 2.7V VCC = 3V IOH = - 24mA IOL = 0.1mA IOL = 6mA IOL = 12mA IOL = 12mA IOL = 24mA Test Conditions(1) VCC = 2.3V to 3.6V IOH = - 0.1mA IOH = - 6mA IOH = - 12mA Min. VCC - 0.2 2 1.7 2.2 2.4 2.2 -- -- -- -- -- Max. -- -- -- -- -- -- 0.2 0.4 0.7 0.4 0.55 V Unit V
NOTE: 1. VIH and VIL must be within the min. or max. range shown in the DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE table for the appropriate VCC range. TA = - 40C to + 85C.
3
IDT74LVC138A 3.3V CMOS 3-LINE TO 8-LINE DECODER/DEMULTIPLEXER
INDUSTRIAL TEMPERATURE RANGE
OPERATING CHARACTERISTICS, TA = 25C
VCC = 2.5V0.2V Symbol CPD Parameter Power Dissipation Capacitance Test Conditions CL = 0pF, f = 10Mhz Typical -- VCC = 3.3V0.3V Typical 27 Unit pF
SWITCHING CHARACTERISTICS(1)
VCC = 2.5V 0.2V Symbol tPLH tPHL tPLH tPHL tPLH tPHL tSU tH tSK(o) Parameter Propagation Delay A to B, C to Yx Propagation Delay G2A or G2B to Yx Propagation Delay G1 to Yx Setup Time, at A, B, and C before G Hold Time, at A, B, and C after G Output Skew(2) Min. -- -- -- 2.4 1.6 -- Max. -- -- -- -- -- -- VCC = 2.7V Min. -- -- -- 2.5 1.5 -- Max. 7.9 7.4 6.4 -- -- -- VCC = 3.3V 0.3V Min. 1 1 1 2.3 1.5 -- Max. 6.7 6.5 5.8 -- -- 1 Unit ns ns ns ns ns ns
NOTES: 1. See TEST CIRCUITS AND WAVEFORMS. TA = - 40C to + 85C. 2 Skew between any two outputs of the same package and switching in the same direction.
4
IDT74LVC138A 3.3V CMOS 3-LINE TO 8-LINE DECODER/DEMULTIPLEXER
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS TEST CONDITIONS
Symbol VLOAD VIH VT VLZ VHZ CL VCC(1)= 2.5V0.2V 2 x Vcc Vcc Vcc / 2 150 150 30 VCC(2)= 3.3V0.3V & 2.7V 6 2.7 1.5 300 300 50 Unit V V V mV mV pF
SAME PHASE INPUT TRANSITION tPLH OUTPUT tPLH OPPOSITE PHASE INPUT TRANSITION tPHL tPHL
VIH VT 0V VOH VT VOL VIH VT 0V
Propagation Delay
LVC QUAD Link
VCC 500 Pulse Generator
(1, 2)
VLOAD Open GND ENABLE CONTROL INPUT tPZL OUTPUT SWITCH NORMALLY CLOSED LOW tPZH OUTPUT SWITCH NORMALLY OPEN HIGH VLOAD/2 VT tPHZ VT 0V tPLZ DISABLE VIH VT 0V VLOAD/2 VLZ VOL VOH VHZ 0V
LVC QUAD Link
VIN D.U.T. RT
VOUT
500 CL
LVC QUAD Link
Test Circuit for All Outputs
DEFINITIONS: CL = Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator. NOTES: 1. Pulse Generator for All Pulses: Rate 10MHz; tF 2ns; tR 2ns. 2. Pulse Generator for All Pulses: Rate 10MHz; tF 2.5ns; tR 2.5ns.
NOTE: 1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
Enable and Disable Times
SWITCH POSITION
Test Open Drain Disable Low Enable Low Disable High Enable High All Other Tests Switch VLOAD GND Open
DATA INPUT TIMING INPUT SYNCHRONOUS CONTROL ASYNCHRONOUS CONTROL
tSU
tH
tREM
INPUT
tPLH1
tPHL1
VIH VT 0V VOH VT VOL VOH VT VOL
tSU
tH
VIH VT 0V VIH VT 0V VIH VT 0V VIH VT 0V
LVC QUAD Link
Set-up, Hold, and Release Times
LOW-HIGH-LOW PULSE tW HIGH-LOW-HIGH PULSE VT
LVC QUAD Link
OUTPUT 1
tSK (x)
tSK (x)
VT
OUTPUT 2 tPLH2 tPHL2
tSK(x) = tPLH2 - tPLH1 or tPHL2 - tPHL1
LVC QUAD Link
Output Skew - tSK(X)
NOTES: 1. For tSK(o) OUTPUT1 and OUTPUT2 are any two outputs. 2. For tSK(b) OUTPUT1 and OUTPUT2 are in the same bank.
Pulse Width
5
IDT74LVC138A 3.3V CMOS 3-LINE TO 8-LINE DECODER/DEMULTIPLEXER
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
XX IDT XXXX XX LVC Device Type Package Temp. Range
Q DC PY PG 138A 74
Quarter Size Outline Package Small Outline IC Shrink Small Outline Package Thin Shrink Small Outline Package 3-Line to 8-Line Decoder/Demultiplexer, 24mA -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
for Tech Support: logichelp@idt.com (408) 654-6459
6

▲Up To Search▲

Price & Availability of IDT74LVC138A

	To Download IDT74LVC138A Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .