INTEGRATED CIRCUITS
74ABT245
Octal transceiver with direction pin
(3-State)
Product data
Supersedes data of 1998 Jan 16
2003 Feb 06
Philips Semiconductors Product data
74ABT245Octal transceiver with direction pin (3-State)
FEATURES
•Octal bidirectional bus interface
•3-State buffers
•Output capability: +64 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
DESCRIPTION
The 74ABT245 high-performance BiCMOS device combines low
static and dynamic power dissipation with high speed and high
output drive.
The 74ABT245 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
easy cascading and a Direction (DIR) input for direction control.
•Power-up 3-State
•Live insertion/extraction permitted
•Inputs are disabled during 3-State mode
QUICK REFERENCE DATA
SYMBOL PARAMETER
t
PLH
t
PHL
C
C
I
CCZ
IN
I/O
Propagation delay
An to Bn or Bn to An
CL = 50 pF; VCC = 5 V
Input capacitance DIR, OE VI = 0 V or V
I/O pin capacitance Outputs disabled; VO = 0 V or V
Total supply current Outputs disabled; VCC =5.5 V 50 µA
ORDERING INFORMATION
PACKAGES TEMPERATURE RANGE PART NUMBER DWG NUMBER
20-Pin plastic SO –40 °C to +85 °C 74ABT245D SOT163-1
20-Pin Plastic SSOP Type II –40 °C to +85 °C 74ABT245DB SOT339-1
20-Pin Plastic TSSOP Type I –40 °C to +85 °C 74ABT245PW SOT360-1
CONDITIONS
T
= 25 °C; GND = 0 V
amb
CC
CC
TYPICAL UNIT
2.2
2.9
4 pF
7 pF
) input for
ns
PIN CONFIGURATION
1
DIR
2
A0
3
A1
4
A2
5
A3
6
A4
7
A5
8
A6
9
A7
10 11
GND
2003 Feb 06
20
19
18
17
16
15
14
13
12
SA00121
V
OE
B0
B1
B2
B3
B4
B5
B6
B7
PIN DESCRIPTION
PIN
CC
NUMBER
1 DIR Direction control input
2, 3, 4, 5,
6, 7, 8, 9
18, 17, 16,
15, 14, 13,
12, 11
19 OE Output enable input (active-LOW)
10 GND Ground (0 V)
20 V
2
SYMBOL NAME AND FUNCTION
A0 – A7 Data inputs/outputs (A side)
B0 – B7 Data inputs/outputs (B side)
Positive supply voltage
CC
Philips Semiconductors Product data
74ABT245Octal transceiver with direction pin (3-State)
LOGIC SYMBOL
DIR
A0
A1
A2
A3
A4
A5
A6
A7
LOGIC SYMBOL (IEEE/IEC)
1
19
OE
2
18
3
4
5
6
7
8
9
B0
17
B1
16
B2
15
B3
14
B4
13
B5
12
B6
11
B7
SA00122
19
1
2
3
4
5
6
7
8
9
G3
3 EN1 (BA)
3 EN2 (AB)
1
2
18
17
16
15
14
13
12
11
SA00123
FUNCTION TABLE
INPUTS INPUTS/OUTPUTS
OE DIR An Bn
L L An = Bn Inputs
L H Inputs Bn = An
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 junction
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.
2003 Feb 06
3
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