Document
HD74LVC541A
Octal Buffers / Line Drivers with 3-state Outputs
ADE-205-115B(Z) 3rd Edition December 1996 Description
The HD74LVC541A has eight line drivers with three state outputs in a 20 pin package. When G1 and G2 is low level, this drivers set up output is enable. 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 = 25°C) Typical VOH undershoot > 2.0 V (@VCC = 3.3 V, Ta = 25°C) High output current ±24 mA (@VCC = 3.0 V to 5.5 V)
Function Table
Inputs G1 L L H X H: L: X: Z: High level Low level Immaterial High impedance G2 L L X H A L H X X Output Y L H Z Z
HD74LVC541A
Pin Arrangement
G1 1 A1 A2 2 3
20 VCC 19 G2 18 Y1 17 Y2 16 Y3 15 Y4 14 Y5 13 Y6 12 Y7 11 Y8
A3 4 A4 A5 A6 A7 5 6 7 8
A8 9 GND 10
(Top view)
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HD74LVC541A
Absolute Maximum Ratings
Item Supply voltage Input diode current Input voltage Output diode current Symbol VCC I IK VI I OK Ratings –0.5 to 6.0 –50 –0.5 to 6.0 –50 50 Output voltage VO –0.5 to VCC +0.5 –0.5 to 6.0 Output current VCC, GND current / pin Storage temperature IO I CC or IGND Tstg ±50 100 –65 to +150 Unit V mA V mA mA V V mA mA °C VO = –0.5 V VO = VCC+0.5 V Output "H" or "L" Output "Z" or VCC:OFF VI = –0.5 V Conditions
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.
Recommended Operating Conditions
Item Supply voltage Symbol VCC Ratings 1.5 to 5.5 2.0 to 5.5 Input / output voltage VI VO 0 to 5.5 0 to V CC 0 to 5.5 Operating temperature Output current Ta I OH –40 to 85 –12 –24 I OL
*1 *2
Unit V V V V V °C mA mA mA mA ns/V
Conditions Data hold At operation G1, G2, 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
12 24
*2
Input rise / fall time
t r, t f
10
Notes: 1. This item guarantees maximum limit when one input switches. Waveform : Refer to test circuit of switching characteristics. 2. duty cycle ≤ 50%
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HD74LVC541A
Electrical Characteristics
Ta = –40 to 85°C Item Input voltage Symbol VCC (V) VIH 2.7 to 3.6 4.5 to 5.5 VIL 2.7 to 3.6 4.5 to 5.5 Output voltage VOH 2.7 to 5.5 2.7 3.0 3.0 4.5 VOL 2.7 to 5.5 2.7 3.0 4.5 Input current Off state output current Output leak current I IN I OZ I OFF 0 to 5.5 2.7 to 5.5 0 2.7 to 3.6 2.7 to 5.5 ∆ I CC 3.0 to 3.6 Min 2.0 VCC×0.7 — — VCC–0.2 2.2 2.4 2.2 3.8 — — — — — — — — — — Max — — 0.8 Unit Test Conditions V V V I OH = –100 µA I OH = –12 mA
VCC×0.3 V — — — — — 0.2 0.4 0.55 0.55 ±5.0 ±5.0 20 ±10 10 500 V V V V V V V V V µA µA µA µA µA µA VIN = 5.5 V or GND VIN = VCC, GND VOUT = 5.5 V or GND VIN / V OUT = 5.5 V VIN / V OUT = 3.6 to 5.5 V VIN = VCC or GND VIN = one input at(VCC–0.6)V, other inputs at V CC or GND I OL = 100 µA I OL = 12 mA I OL = 24 mA I OH = –24 mA
Quiescent supply current I CC
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HD74LVC541A
Switching Characteristics
Ta = –40 to 85°C Item Propagation delay time Symbol VCC (V) t PLH t PHL 2.7 3.3±0.3 5.0±0.5 Output enable time t ZH t ZL 2.7 3.3±0.3 5.0±0.5 Output disable time t HZ t LZ 2.7 3.3±0.3 5.0±0.5 Between output pins skew *1 t OSLH t OSHL 2.7 3.3±0.3 5.0±0.5 Input capacitance Output capacitance Note: CIN CO 2.7 2.7 Min — 1.5 — — 1.5 — — 1.5 — — — — — — Typ — — — — — — — — — — — — 3.0 15.0 Max 7.5 6.5 5.0 9.5 8.5 7.0 8.5 7.5 6.5 — 1.0 1.0 — — Unit ns ns ns ns ns ns ns ns ns ns ns ns pF pF G1 or G2 Y G1 or G2 Y From (Input) To (Output) A Y
1. This parameter is characterized but not tested. tosLH = | tPLHm - tPLHn |, tosHL = | tPHLm - tPHLn|
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HD74LVC541A
Test Circuit
VCC G1 Input Output VCC
See Function Table
Pulse generator Zout = 50 Ω
A1
Y1 CL = 50 pF
500 Ω S1 450 Ω 50 Ω Scope
*1
OPEN See under table GND
G2 Symbol t PLH / t PHL t ZH/ t HZ t ZL / t LZ Notes: 1. 2. CL includes probe and jig capacitance. A2-Y2 to A8-Y8 are identical to above load circuit. S1
Vcc=2.7V, 3.3±0.3V Vcc=5.0±0.5V
OPEN GND 6V
OPEN GND 2×Vcc
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HD74LVC541A
Waveforms – 1
tr Input A 90 % Vref 10 % t PLH Vref 90 % Vref 10 % t PHL VOH Output Y Vref VOL Notes: 1. 2. t r = 2.5 ns, tf = 2.5 ns Input waveform : PRR = 10 MHz, duty cycle 50% tf VIH GND
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 Notes: 1. 2. 3. 4.
Vcc=2.7V, 3.3±0.3V Vcc=5.0±0.5V
2.7 V 1.5 V 3V GND
Vcc 50%Vcc Vcc GND
t r = 2.5 ns, tf = 2.5 ns Input waveform : PRR = 10 MHz, duty cycle 50% Waveform – A shows input conditions such that the output is "L" level when enable by the output control. Waveform – B shows input conditions such that the output is "H" level when enable by the output control.
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U.