Philips Semiconductors Product specification
74ABT2244
Octal buffer/line driver with 30Ω series
termination resistors (3-State)
2
1998 Jan 16 853-1627 18867
FEATURES
• Octal bus interface
• 3-State buffers
• Live insertion/extraction permitted
• Outputs include series resistance of 30Ω, making external
termination resistors unnecessary
• Output capability: +5mA/–32mA
• Latch-up protection exceeds 500mA per Jedec Std 17
• ESD protection exceeds 2000 V per MIL STD 883 Method 3015
and 200 V per Machine Model
• Power-up 3-State
• Same part as 74ABT244-1
• Inputs are disabled during 3-State mode
DESCRIPTION
The 74ABT2244 high-performance BiCMOS device combines low
static and dynamic power dissipation with high speed.
The 74ABT2244 device is an octal buffer that is ideal for driving bus
lines. The device features two Output Enables (1OE
, 2OE), each
controlling four of the 3-State outputs.
The 74ABT2244 is designed with 30Ω series resistance in both the
High and Low states of the output. This design reduces line noise in
applications such as memory address drivers, clock drivers and bus
receivers/transmitters.
The 74ABT2244 is the same as the 74ABT244-1. The part number
has been changed to reflect industry standards.
QUICK REFERENCE DATA
SYMBOL PARAMETER
CONDITIONS
T
amb
= 25°C; GND = 0V
TYPICAL UNIT
t
PLH
t
PHL
Propagation delay
An to Yn
C
L
= 50pF; V
CC
= 5V
2.8
3.9
ns
C
IN
Input capacitance V
I
= 0V or V
CC
4 pF
C
OUT
Output capacitance Outputs disabled; V
O
= 0V or V
CC
7 pF
I
CCZ
Total supply current Outputs disabled; V
CC
= 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 74ABT2244 N 74ABT2244 N SOT146-1
20-Pin plastic SO –40°C to +85°C 74ABT2244 D 74ABT2244 D SOT163-1
20-Pin Plastic SSOP Type II –40°C to +85°C 74ABT2244 DB 74ABT2244 DB SOT339-1
20-Pin Plastic TSSOP Type I –40°C to +85°C 74ABT2244 PW 7ABT2244PW DH SOT360-1
PIN CONFIGURATION
1
2
3
4
5
6
7
8
9
10 11
12
13
14
15
16
17
18
19
20
1OE
1A0
2Y0
1A1
2Y1
1A2
2Y2
1A3
2Y3 1Y3
GND
2A2
1Y2
2A1
1Y1
2A0
1Y0
2OE
V
CC
2A3
SA00148
PIN DESCRIPTION
PIN NUMBER SYMBOL NAME AND FUNCTION
2, 4, 6, 8 1A0 – 1A3 Data inputs
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
Positive supply voltage
