Philips Semiconductors Product data
74ABT2245
Octal transceiver with direction pin and
30 Ω series termination resistors (3-State)
2
2002 Dec 17
FEATURES
• Octal bidirectional bus interface
• 3-State buffers
• Output capability: +12 mA / –32 mA
• Latch-up protection exceeds 500 mA per Jedec Std 17
• ESD protection exceeds 2000 V per MIL STD 833 Method 3015
and 200 V per Machine Model
• Power-up 3-State
• Live insertion/extraction permitted
• Same as 74ABT245-1
• Outputs include series resistance of 30 Ω, making external
termination resistors unnecessary
• Inputs are disabled during 3-State mode
DESCRIPTION
The 74ABT2245 high-performance BiCMOS device combines low
static and dynamic power dissipation with high speed.
The 74ABT2245 device is an octal transceiver featuring
non-inverting 3-State bus compatible outputs in both send and
receive directions. The control function implementation minimizes
external timing requirements. The device features an Output Enable
(OE
) input for easy cascading and a Direction (DIR) input for
direction control.
The 74ABT2245 is designed with 30 Ω 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 74ABT2245 is the same as the 74ABT245-1. The part number
has been changed to reflect industry standards.
QUICK REFERENCE DATA
SYMBOL PARAMETER
CONDITIONS
T
amb
= 25 °C; GND = 0 V
TYPICAL UNIT
t
PLH
t
PHL
Propagation delay
An to Bn or Bn to An
C
L
= 50 pF; V
CC
= 5 V 3.9 ns
C
IN
Input capacitance DIR, OE V
I
= 0 V or V
CC
4 pF
C
I/O
I/O pin capacitance Outputs disabled; V
O
= 0 V or V
CC
7 pF
I
CCZ
Total supply current Outputs disabled; V
CC
= 5.5 V 50 µA
ORDERING INFORMATION
PACKAGES TEMPERATURE RANGE PART NUMBER DWG NUMBER
20-Pin plastic SO –40 °C to +85 °C 74ABT2245D SOT163-1
20-Pin Plastic SSOP Type II –40 °C to +85 °C 74ABT2245DB SOT339-1
20-Pin Plastic TSSOP Type I –40 °C to +85 °C 74ABT2245PW SOT360-1
PIN CONFIGURATION
1
2
3
4
5
6
7
8
9
10 11
12
13
14
15
16
17
18
19
20
DIR
A0
A1
A2
A3
A4
A5
A6
A7
GND
V
CC
OE
B0
B1
B2
B3
B4
B5
B6
B7
SA00121
PIN DESCRIPTION
PIN NUMBER SYMBOL NAME AND FUNCTION
1 DIR Direction control input
2, 3, 4, 5, 6, 7, 8, 9 A0 – A7 Data inputs/outputs (A side)
18, 17, 16, 15, 14,
13, 12, 11
B0 – B7 Data inputs/outputs (B side)
19 OE
Output enable input
(active-LOW)
10 GND Ground (0 V)
20 V
CC
Positive supply voltage
