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TECHNICAL DATA
Octal Buffer /Line Driver NINV (3-state)
IN74VHC244 is high-speed logic IC made by CMOS technology and designed for use in high-performance calculating systems with a wide supply voltage range. As for operation speed, IN74VHC244 can be compared with equivalent bipolar ICs based on Schottky TTL and two times surpasses ICs of IN74 series. IN74VHC244 tolerates operation under conditions when voltage on input is exceeded up to 7V without affecting characteristics and IC reliability. This possibility allows to use IN74VHC244 in radio-electronic devices for interfacing with supply voltages 5V and 3V, eliminate IC failure under supply voltage source emergency outage. Use of output edge shaping block in the microcircuit allows to reduce noise amplitude of noises when switching outputs into the same state simultaneously. Input and output levels of IN74VHC244D are compatible with CMOS levels
IN74VHC244
ORDERING INFORMATION IN74VHC244N Plastic IN74VHC244DW SOIC TA = -40 to 85 C for all packages
Features: Supply voltage range 2.0 to 5.5 V. Output current 8 mA. Low consumption current: 0.2 mkA (typical value) at = 25 . Latchup current not less than 300 mA at = 85 . Tolerable value of static potential not less than 2000 V as per human body model (HBM) and not less than 200 V as per machine model (). * Ambient operation temperature minus 40 to plus 85 . * Balanced signal propagation delay. * Ensures voltage exceeding mode on input * Low noise level at the simultaneous switching of outputs in the same state: VOLP = 0.8 V (max). * For pins and functions, compatible with IN74HC244. * * * * * .
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IN74VHC244
IN74VHC244 truth table
Input Output A L H X Y L H Z
G
L L H Note -
H - high voltage level; L - low voltage level; X - any voltage level (low or high); Z - output in third state
Pins description in IN74VHC244
Pinout
1G
01 20 19 18 17 16 15 14 13 12 11
Pin No. 01
Symbol
Description Input OUTPUT ENABLE Data input Data output Data input Data output Data input Data output Data input Data output Common output Data input Data output Data input Data output Data input Data output Data input Data output
Input OUTPUT ENABLE Supply output from voltage source
1G
1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1 GND 2A1 1Y4 2A2 1Y3 2A3 1Y2 2A4 1Y1
VCC 2G 1Y1 2A4 1Y2 2A3 1Y3 2A2 1Y4 2A1
02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19
20
1A1 02 2Y4 03 1A2 04 2Y3 05 1A3 06 2Y2 07 1A4 08 2Y1 09 GND 10
2G
VCC
2
IN74VHC244
Absolute maximum conditions* Parameter, unit
Supply voltage, V Input voltage, V Output voltage, V Input diode current, mA Current of common output and supply output, mA Output current, mA Output diode current, mA Dissipated power, mW
Symbol min
VCC Vin Vout Iik Icc Iout Iok Pd -0.5 -0.5 -0.5 - - - - -
Value max
7.0 7.0 Vcc+0.5V -20 75 25 20 180
*Under absolute maximum conditions operation of microcircuit is not guaranteed. Operation is guaranteed under maximum conditions
Maximum conditions Parameter, unit Symbol min
Supply voltage, V Input voltage,V Output voltage, V Output current, mA Input rise and fall time, ns/V at Vcc = (3.3 0.3) V at Vcc = (5.0 0.5) V VCC Vin Vout Iout tLH, tHL 2.0 0 0 - 0 0
Value max
5.5 VCC VCC 8.0 100 20
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IN74VHC244
DC electrical characteristics
Value Symbo l VIH Parameter High input voltage Test conditions - VCC, V 2.0 25 C min 1.5 max - - 0.5 0.3Vcc - - - - - - 0.09 0.09 0.09 0.09 0.36 0.36 0.25 0.1 4.0 -40 to 85 C min max 1.5 - 0.7Vcc - - 1.9 2.9 4.4 5.4 2.48 3.80 - - - - - - - 0.5 0.3Vcc - - - - - - 0.1 0.1 0.1 0.1 0.44 0.44 2.5 1.0 40.0 mkA Unit
V
3.0-5.5 0.7Vcc VIL Low input voltage - 2.0 3.0-5.5 2.0 3.0 4.5 5.5 3.0 4.5 2.0 3.0 4.5 5.5 - - 1.92 2.92 4.42 5.52 2.58 3.94 - - - - - - -
VOH High output voltage
VI = VIH or VIL IO = -50 mkA
VOL
Low output voltage
VI = VIH or VIL; IO = -4 mA VI = VIH or VIL; IO = -8 mA VI = VIH orVIL IO = 50 mkA
IOZ II ICC
VI = VIH or VIL 3.0 IO = 4 mA VI = VIH or VIL 4.5 IO = 8 mA Output current in VI = VIH or VIL 5.5 VO = VCC or 0V "off" state Input current VI = 5.5V or 0V 0 - 5.5 Consumption current VI =VCC or 0V 5.5
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IN74VHC244
AC electrical characteristics (tLH = tHL = 3.0 ns)
Symbol tPHL, tPLH Parameter Test conditi VCC, V ons Value CL, pF 15 50 15 50 50 50 15 50 15 50 50 50 -40 to 85 C min max min max - 8.4 - 10.0 - 11.9 - 13.5 - 5.5 - 6.5 - 7.5 - 8.5 - 14.0 - 16.0 25 C - - - - - - - 9.2 10.6 14.1 7.3 9.3 1.5 1.0 - - - - - - - 10.5 12.5 16.0 8.5 10.5 1.5 1.0 Unit ns
Propagation delay time Figure 3.3 0.3 when switching "on", 1 "off" 5.0 0.5
tPHZ , tPLZ Propagation delay time Figure 3.3 0.3 under transition from 2 high , low level into "off" 5.0 0.5 state tPZH , tPZL Propagation delay time Figure under transition from 2 off state into high, low level tOSLH, tOSHL Propagation delays - difference between outputs 3.3 0.3 5.0 0.5 3.3 0.3 5.5 0.5
Capacitance characteristics
Symbol CI CO CD Parameter Input capacity Output capacity Dynamic capacity Test conditions VI = 0 V orVCC VCC, V 5.0 5.0 5.0 Value 25 C min max 10 12 38 Unit pF pF pF
Noise characteristics (CL = 50 pF)
Parameter Symbol VOLP VOLV VIHD VILD VCC, V Positive noise of low output voltage 5.0 Negative noise of low output 5.0 voltage Input dynamic high voltage Input dynamic low voltage 5.0 5.0 min -0.9 3.5 Value max 0.9 1.5 Unit V
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IN74VHC244
- Time diagram of input and output pulses
tLH 0.9 A 0.1 tPLH 0.5 0.5 0.1 tPHL VCC 0.5 0.5 0V GND tHL 0.9 VCC
Y
Fig. 1
tHL G 0.9 0.5 0.1 tPZH Y 0.5 0.1
tLH 0.9 0.5
VCC
0V 0.9 tPHZ 0V VCC VOH
tPLZ Y 0.5 tPZL 0.1
VOL
Fig.2
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IN74VHC244
N SUFFIX PLASTIC DIP (MS - 001AD)
A
Dimension, mm
20 11 B 1 10
Symbol A B C
MIN 24.89 6.1
MAX 26.92 7.11 5.33
F
L
D F
0.36 1.14 2.54 7.62 0 2.92 7.62 0.2 0.38
0.56 1.78
C -T- SEATING N G D 0.25 (0.010) M T K
PLANE
G H
H J
M
J K L M N
10 3.81 8.26 0.36
NOTES:
1. Dimensions "A", "B" do not include mold flash or protrusions. Maximum mold flash or protrusions 0.25 mm (0.010) per side.
D SUFFIX SOIC (MS - 013AC)
A 20 11
Dimension, mm Symbol MIN 12.6 7.4 2.35 0.33 0.4 1.27 9.53 0 0.1 0.23 10 0.25 8 0.3 0.32 10.65 0.75 MAX 13 7.6 2.65 0.51 1.27
H
B
P
A B
1
G
10 C R x 45
C D F
-TD 0.25 (0.010) M T C M K
SEATING PLANE
J
F
M
G H J K M P R
NOTES: 1. Dimensions A and B do not include mold flash or protrusion. 2. Maximum mold flash or protrusion 0.15 mm (0.006) per side for A; for B 0.25 mm (0.010) per side.
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