Philips 74abt244 DATASHEETS
INTEGRATED CIRCUITS
74ABT244
Octal buffer/line driver (3-State)
Product specification
Supersedes data of 1995 Sep 06
IC23 Data Handbook
1998 Jan 16
Philips Semiconductors Product specification
74ABT244Octal buffer/line driver (3-State)
FEA TURES
•Octal bus interface
•3-State buffers
•Output capability: +64mA/–32mA
•Latch-up protection exceeds 500mA per Jedec Std 17
•ESD protection exceeds 2000 V per MIL STD 883 Method 3015
DESCRIPTION
The 74ABT244 high-performance BiCMOS device combines low
static and dynamic power dissipation with high speed and high
output drive.
The 74ABT244 device is an octal buffer that is ideal for driving bus
lines. The device features two Output Enables (1OE
controlling four of the 3-State outputs.
, 2OE), each
and 200 V per Machine Model
•Power-up 3-State
•Live insertion capacity
•Inputs are disabled during 3-State mode
QUICK REFERENCE DATA
SYMBOL PARAMETER
C
t
PLH
t
PHL
C
OUT
I
CCZ
IN
Propagation delay
An to Yn
CL = 50pF; VCC = 5V 2.9 ns
Input capacitance VI = 0V or V
Output capacitance Outputs disabled; VO = 0V or V
Total supply current Outputs disabled; VCC =5.5V 50 µA
ORDERING INFORMATION
PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA DWG NUMBER
20-Pin Plastic DIP –40°C to +85°C 74ABT244 N 74ABT244 N SOT146-1
20-Pin plastic SO –40°C to +85°C 74ABT244 D 74ABT244 D SOT163-1
20-Pin Plastic SSOP Type II –40°C to +85°C 74ABT244 DB 74ABT244 DB SOT339-1
20-Pin Plastic TSSOP Type I –40°C to +85°C 74ABT244 PW 74ABT244PW DH SOT360-1
CONDITIONS
T
= 25°C; GND = 0V
amb
CC
CC
TYPICAL UNIT
4 pF
7 pF
PIN CONFIGURATION
PIN DESCRIPTION
PIN NUMBER SYMBOL NAME AND FUNCTION
2, 4, 6, 8 1A0 – 1A3 Data inputs
1
1OE
2
1A0
3
2Y0
4
1A1
5
2Y1
6
1A2
7
2Y2
8
1A3
9
2Y3 1Y3
10 11
GND
1998 Jan 16 853–1444 18867
20
V
2OE
19
1Y0
18
2A0
17
1Y1
16
2A1
15
1Y2
14
2A2
13
12
2A3
SA00148
CC
11, 13, 15, 17 2A0 – 2A3 Data inputs
18, 16, 14, 12 1Y0 – 1Y3 Data outputs
9, 7, 5, 3 2Y0 – 2Y3 Data outputs
1, 19 1OE, 2OE Output enables
10 GND Ground (0V)
20 V
CC
2
Positive supply voltage
Philips Semiconductors Product specification
74ABT244Octal buffer/line driver (3-State)
LOGIC SYMBOL
11
13
15
17
19
LOGIC SYMBOL (IEEE/IEC)
1A0
2
1A1
4
1A2
6
1A3
8
1OE
1
2A3
2A2
2A1
2A0
2OE
1Y0
1Y1
1Y2
1Y3
2Y3
2Y2
2Y1
2Y0
SA00149
18
16
14
12
9
7
5
3
1
2
4
6
8
19
11 9
13 7
15 5
17
EN
EN
SA00150
18
16
14
12
3
FUNCTION TABLE
INPUTS OUTPUTS
1OE 1An 2OE 2An 1Yn 2Yn
L L L L L L
L H L H H H
H X H X Z Z
H = High voltage level
L = Low voltage level
X = Don’t care
Z = High impedance “off” state
ABSOLUTE MAXIMUM RATINGS
SYMBOL
V
CC
I
IK
V
I
I
OK
V
OUT
I
OUT
T
stg
DC supply voltage –0.5 to +7.0 V
DC input diode current VI < 0 –18 mA
DC input voltage
DC output diode current VO < 0 –50 mA
DC output voltage
DC output current output in Low state 128 mA
Storage temperature range –65 to 150 °C
PARAMETER CONDITIONS RATING UNIT
3
3
1, 2
–1.2 to +7.0 V
output in Off or High state –0.5 to +5.5 V
NOTES:
1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the
device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to
absolute-maximum-rated conditions for extended periods may affect device reliability .
2. The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create ju nction
temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150°C.
3. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
1998 Jan 16
3
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