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HD74LVC244A
Octal Buffers / Line Drivers with 3-state Outputs
REJ03D0352-0400Z (Previous ADE-205-110B (Z)) Rev.4.00 Jul. 27, 2004
Description
The HD74LVC244A has eight line drivers with three state outputs in a 20 pin package. This device is a non inverting buffer and has two active low enables (1G and 2G). Each enable independently controls four buffers. Low voltage and high-speed operation is suitable at the battery drive product (note type personal computer) and low power consumption extends the life of a battery for long time operation.
Features
* * * * * * * VCC = 2.0 V to 5.5 V All inputs VIH (Max.) = 5.5 V (@VCC = 0 V to 5.5 V) All outputs VOUT (Max.) = 5.5 V (@VCC = 0 V or output off state) Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25C) Typical VOH undershoot > 2.0 V (@VCC = 3.3 V, Ta = 25C) High output current 24 mA (@VCC = 3.0 V to 5.5 V) Ordering Information
Package Type SOP-20 pin (JEITA) TSSOP-20 pin Package Code FP-20DAV TTP-20DAV Package Abbreviation FP T Taping Abbreviation (Quantity) EL (2,000 pcs/reel) ELL (2,000 pcs/reel)
Part Name HD74LVC244AFPEL HD74LVC244ATELL
Note: Please consult the sales office for the above package availability.
Function Table
Inputs G H L L H: L: X: Z: High level Low level Immaterial High impedance A X H L Output Y Z H L
Rev.4.00 Jul. 27, 2004 page 1 of 6
HD74LVC244A
Pin Arrangement
1G 1 1A1 2 2Y4 3 1A2 4 2Y3 5 1A3 6 2Y2 7 1A4 8 2Y1 9 GND 10
20 VCC 19 2G 18 1Y1 17 2A4 16 1Y2 15 2A3 14 1Y3 13 2A2 12 1Y4 11 2A1
(Top view)
Absolute Maximum Ratings
Item Supply voltage Input diode current Input voltage Output diode current Output voltage Output current VCC, GND current / pin Storage temperature Symbol VCC IIK VI IOK VO IO ICC or IGND Tstg Ratings -0.5 to 6.0 -50 -0.5 to 6.0 -50 50 -0.5 to VCC +0.5 -0.5 to 6.0 50 100 -65 to 150 Unit V mA V mA V mA mA C Conditions VI = -0.5 V VO = -0.5 V VO = VCC +0.5 V Output "H" or "L" Output "Z" VCC:OFF
Note: The absolute maximum ratings are values, which must not individually be exceeded, and furthermore, no two of which may be realized at the same time.
Rev.4.00 Jul. 27, 2004 page 2 of 6
HD74LVC244A
Recommended Operating Conditions
Item Supply voltage Input / output voltage Symbol VCC VI VO Ta IOH IOL Input rise / fall time *1 tr, tf Ratings 1.5 to 5.5 2.0 to 5.5 0 to 5.5 0 to VCC 0 to 5.5 -40 to 85 -12 -24*2 12 24*2 10 Unit V V V C mA mA ns/V Conditions Data retention At operation G, A Output "H" or "L" Output "Z" or VCC:OFF VCC = 2.7 V VCC = 3.0 V to 5.5 V VCC = 2.7 V VCC = 3.0 V to 5.5 V
Operating temperature Output current
Notes: 1. This item guarantees maximum limit when one input switches.
Waveform: Refer to test circuit of switching characteristics.
2. Duty cycle 50%
Electrical Characteristics
Ta = -40 to 85C Item Input voltage Symbol VIH VIL Output voltage VOH VCC (V) 2.7 to 3.6 4.5 to 5.5 2.7 to 3.6 4.5 to 5.5 2.7 to 5.5 2.7 3.0 3.0 4.5 2.7 to 5.5 2.7 3.0 4.5 0 to 5.5 2.7 to 5.5 0 2.7 to 3.6 2.7 to 5.5 3.0 to 3.6 Min 2.0 VCCx0.7 -- -- VCC -0.2 2.2 2.4 2.2 3.8 -- -- -- -- -- -- -- -- -- -- Max -- -- 0.8 VCCx0.3 -- -- -- -- -- 0.2 0.4 0.55 0.55 5.0 5.0 20 10 10 500 Unit V V V IOH = -100 A IOH = -12 mA IOH = -24 mA V IOL = 100 A IOL = 12 mA IOL = 24 mA VIN = 5.5 V or GND VIN = VCC, GND, VOUT = 5.5 V or GND VIN / VOUT = 5.5 V VIN / VOUT = 3.6 to 5.5 V VIN = VCC or GND VIN = one input at (VCC -0.6)V, other inputs at VCC or GND Test Conditions
VOL
Input current Off state output current Output leak current Quiescent supply current
IIN IOZ IOFF ICC ICC
A A A A A
Rev.4.00 Jul. 27, 2004 page 3 of 6
HD74LVC244A
Switching Characteristics
Ta = -40 to 85C Item Propagation delay time Symbol tPLH tPHL tZH tZL tZH tLZ tOSLH tOSHL CIN CO VCC (V) 2.7 3.30.3 5.00.5 2.7 3.30.3 5.00.5 2.7 3.30.3 5.00.5 2.7 3.30.3 5.00.5 2.7 2.7 Min -- 1.5 -- -- 1.5 -- -- 1.5 -- -- -- -- -- -- Typ -- -- -- -- -- -- -- -- -- -- -- -- 3.0 15.0 Max 7.5 6.5 5.0 9.0 8.0 6.5 8.0 7.0 6.0 -- 1.0 1.0 -- -- Unit ns From (Input) A To (Output) Y
Output enable time
ns
G
Y
Output disable time
ns
G
Y
Between output pins skew
*1
ns
Input capacitance Output capacitance Note:
pF pF
1. This parameter is characterized but not tested.
tosLH = | tPLHm - tPLHn|, tosHL = | tPHLm - tPHLn|
Test Circuit
VCC VCC
1G, 2G
Output 500 S1 CL = 50 pF 450 50 Scope OPEN See under table GND
See Function Table
Input
1Y1 to 2Y4
*1
Pulse generator Zout = 50
1A1 to 2A4
Symbol t PLH / t PHL t ZH/ t HZ t ZL / t LZ
S1
Vcc=2.7V, 3.30.3V Vcc=5.00.5V
OPEN GND 6V
OPEN GND 2xVcc
Note:
1. CL includes probe and jig capacitance.
Rev.4.00 Jul. 27, 2004 page 4 of 6
HD74LVC244A Waveforms - 1
tr 90 % Input A Vref 10 % t PLH Vref 90 % Vref 10 % t PHL VOH Output Y Vref VOL tf VIH GND
Notes:
1. tr = 2.5 ns, tf = 2.5 ns 2. Input waveform : PRR = 10 MHz, duty cycle 50%
Waveforms - 2
tf Input G 90 % Vref 10 % t ZL Waveform - A t ZH Waveform - B Vref Vref t HZ VOH - 0.3 V tr 90 % Vref 10 % t LZ VIH GND V OH1 VOL + 0.3 V VOL VOH V OL1 TEST VIH Vref VOH1 VOL1
Vcc=2.7V, 3.30.3V Vcc=5.00.5V
2.7 V 1.5 V 3V GND
Vcc 50%Vcc Vcc GND
Notes:
1. tr = 2.5 ns, tf = 2.5 ns 2. Input waveform : PRR = 10 MHz, duty cycle 50% 3. Waveform - A shows input conditions such that the output is "L" level when enable by the output control. 4. Waveform - B shows input conditions such that the output is "H" level when enable by the output control.
Rev.4.00 Jul. 27, 2004 page 5 of 6
HD74LVC244A
Package Dimensions
As of January, 2002
12.6 13 Max
20
Unit: mm
11
1
10
5.5
0.80 Max
2.20 Max
*0.20 0.05
0.20 7.80 + 0.30 -
1.15
1.27
*0.40 0.06
0.10 0.10
0 - 8
0.70 0.20
0.15
0.12 M
*Pd plating
Package Code JEDEC JEITA Mass (reference value)
FP-20DAV -- Conforms 0.31 g
As of January, 2002
Unit: mm
6.50 6.80 Max 20 11
1
10 0.65 1.0 6.40 0.20 0.65 Max
*0.20 0.05
0.13 M
4.40
*0.15 0.05
1.10 Max
0.10
0.07 +0.03 -0.04
0 - 8
0.50 0.10
*Pd plating
Package Code JEDEC JEITA Mass (reference value)
TTP-20DAV -- -- 0.07 g
Rev.4.00 Jul. 27, 2004 page 6 of 6
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