INTEGRATED CIRCUITS
74ABT2245
Octal transceiver with direction pin with
30Ω series termination resistors (3-State)
Product specification
Supersedes data of 1996 Sep 10
IC23 Data Handbook
1998 Jan 16
Philips
Semiconductors
Philips Semiconductors
Product specification
Octal transceiver with direction pin
and 30Ω series termination resistors (3-State)
74ABT2245
FEATURES
•
Octal bidirectional bus interface
•
3-State buffers
•
Output capability: +12mA/–32mA
•
Latch-up protection exceeds 500mA per Jedec Std 17
•
ESD protection exceeds 2000 V per MIL STD 833 Method 3015
and 200 V per Machine Model
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 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 74ABT2245 is the same as the 74ABT245-1. The part number
has been changed to reflect industry standards.
•
Power-up 3-State
•
Live insertion/extraction permitted
•
Same as 74ABT245-1
•
Outputs include series resistance of 30Ω, making external
termination resistors unnecessary
•
Inputs are disabled during 3-State mode
QUICK REFERENCE DATA
SYMBOL
t
PLH
t
PHL
C
IN
C
I/O
I
CCZ
PARAMETER
Propagation delay
An to Bn or Bn to An
Input capacitance DIR, OE
I/O pin capacitance
Total supply current
CONDITIONS
T
amb
= 25°C; GND = 0V
C
L
= 50pF; V
CC
= 5V
V
I
= 0V or V
CC
Outputs disabled; V
O
= 0V or V
CC
Outputs disabled; V
CC
=5.5V
TYPICAL
3.9
4
7
50
UNIT
ns
pF
pF
µA
ORDERING INFORMATION
PACKAGES
20-Pin Plastic DIP
20-Pin plastic SO
20-Pin Plastic SSOP Type II
20-Pin Plastic TSSOP Type I
TEMPERATURE RANGE
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
OUTSIDE NORTH AMERICA
74ABT2245 N
74ABT2245 D
74ABT2245 DB
74ABT2245 PW
NORTH AMERICA
74ABT2245 N
74ABT2245 D
74ABT2245 DB
7ABT2245PW DH
DWG NUMBER
SOT146-1
SOT163-1
SOT339-1
SOT360-1
PIN CONFIGURATION
DIR
A0
A1
A2
A3
A4
A5
A6
A7
1
2
3
4
5
6
7
8
9
20 V
CC
19 OE
18 B0
17 B1
16 B2
15 B3
14 B4
13 B5
12 B6
11
B7
PIN DESCRIPTION
PIN NUMBER
1
2, 3, 4, 5, 6, 7, 8, 9
18, 17, 16, 15, 14,
13, 12, 11
19
10
20
SYMBOL
DIR
A0 – A7
B0 – B7
OE
GND
V
CC
NAME AND FUNCTION
Direction control input
Data inputs/outputs (A side)
Data inputs/outputs (B side)
Output enable input
(active-Low)
Ground (0V)
Positive supply voltage
GND 10
SA00121
1998 Jan 16
2
853-1761 18865
Philips Semiconductors
Product specification
Octal transceiver with direction pin
and 30Ω series termination resistors (3-State)
74ABT2245
LOGIC SYMBOL
1
DIR
19
2
18
A1
3
17
A2
4
16
A3
5
15
A4
6
14
A5
7
13
A6
8
12
A7
9
11
B7
B6
B5
B4
B3
B2
B1
B0
OE
FUNCTION TABLE
INPUTS
OE
L
L
H
H
L
X
Z
DIR
L
H
X
INPUTS/OUTPUTS
An
An = Bn
Inputs
Z
Bn
Inputs
Bn = An
Z
A0
= High voltage level
= Low voltage level
= Don’t care
= High impedance ”off” state
SCHEMATIC OF EACH OUTPUT
V
CC
SA00122
LOGIC SYMBOL IEEE/IEC
19
G3
3 EN1 (BA)
1
3 EN2 (AB)
OUTPUT
SA00237
1
2
3
4
5
6
7
8
9
2
18
17
16
15
14
13
12
11
SA00313
1998 Jan 16
3
Philips Semiconductors
Product specification
Octal transceiver with direction pin
and 30Ω series termination resistors (3-State)
74ABT2245
ABSOLUTE MAXIMUM RATINGS
1, 2
SYMBOL
V
CC
I
IK
V
I
I
OK
V
OUT
I
OUT
T
stg
PARAMETER
DC supply voltage
DC input diode current
DC input voltage
3
DC output diode current
DC output voltage
3
DC output current
Storage temperature range
V
O
< 0
output in Off or High state
output in Low state
V
I
< 0
CONDITIONS
RATING
–0.5 to +7.0
–18
–1.2 to +7.0
–50
–0.5 to +5.5
128
–65 to 150
UNIT
V
mA
V
mA
V
mA
°C
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.
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
Min
V
CC
V
I
V
IH
V
IL
I
OH
I
OL
∆t/∆v
T
amb
DC supply voltage
Input voltage
High-level input voltage
Low-level Input voltage
High-level output current
Low-level output current
Input transition rise or fall rate
Operating free-air temperature range
0
–40
4.5
0
2.0
0.8
–32
12
5
+85
LIMITS
Max
5.5
V
CC
V
V
V
V
mA
mA
ns/V
°C
UNIT
1998 Jan 16
4
Philips Semiconductors
Product specification
Octal transceiver with direction pin
and 30Ω series termination resistors (3-State)
74ABT2245
DC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL
PARAMETER
TEST CONDITIONS
T
amb
= +25°C
Min
V
IK
Input clamp voltage
V
CC
= 4.5V; I
IK
= –18mA
V
CC
= 4.5V; I
OH
= –3mA; V
I
= V
IL
or V
IH
V
OH
High-level output voltage
V
CC
= 5.0V; I
OH
= –3mA; V
I
= V
IL
or V
IH
V
CC
= 4.5V; I
OH
= –32mA; V
I
= V
IL
or V
IH
V
O
OL
Low-level
Low level output voltage
Input leakage
g
current
Control pins
Data pins
V
CC
= 4.5V; I
OL
= 5mA; V
I
= V
IL
or V
IH
V
CC
= 4.5V; I
OL
= 12mA; V
I
= V
IL
or V
IH
V
CC
= 5.5V; V
I
= GND or 5.5V
V
CC
= 5.5V; V
I
= GND or 5.5V
V
CC
= 0.0V; V
I
or V
O
≤
4.5V
V
CC
= 2.1V; V
O
= 0.5V; V
I
= GND or V
CC
;
V
OE
= Don’t care
V
CC
= 5.5V; V
O
= 2.7V; V
I
= V
IL
or V
IH
V
CC
= 5.5V; V
O
= 0.5V; V
I
= V
IL
or V
IH
V
CC
= 5.5V; V
O
= 5.5V; V
I
= GND or V
CC
V
CC
= 5.5V; V
O
= 2.5V
V
CC
= 5.5V; Outputs High, V
I
= GND or V
CC
Quiescent su ly current
supply
V
CC
= 5.5V; Outputs Low, V
I
= GND or V
CC
V
CC
= 5.5V; Outputs 3-State;
V
I
= GND or V
CC
Outputs enabled, one input at 3.4V, other
inputs at V
CC
or GND; V
CC
= 5.5V
∆I
CC
Additional supply current per
input pin
2
Outputs 3-State, one data input at 3.4V,
other inputs at V
CC
or GND; V
CC
= 5.5V
Outputs 3-State, one enable input at 3.4V,
other inputs at V
CC
or GND; V
CC
= 5.5V
–40
2.5
3.0
2.0
Typ
–0.9
2.9
3.4
2.4
0.32
0.5
±0.01
±5
±5.0
±5.0
5.0
–5.0
5.0
–100
50
24
50
0.5
50
0.5
0.55
0.8
±1.0
±100
±100
±50
50
–50
50
–180
250
30
250
1.5
250
1.5
–40
Max
–1.2
2.5
3.0
2.0
0.55
0.8
±1.0
±100
±100
±50
50
–50
50
–180
250
30
250
1.5
250
1.5
T
amb
= –40°C
to +85°C
Min
Max
–1.2
V
V
V
V
V
V
µA
µA
µA
µA
µA
µA
µA
mA
µA
mA
µA
mA
µA
mA
UNIT
I
I
I
OFF
I
PU
/I
PD
I
IH
+ I
OZH
I
IL
+ I
OZL
I
CEX
I
O
I
CCH
I
CCL
I
CCZ
Power-off leakage current
Power-up/down 3-State
output current
3
3-State output High current
3-State output Low current
Output high leakage current
Output current
1
NOTES:
1. Not more than one output should be tested at a time, and the duration of the test should not exceed one second.
2. This is the increase in supply current for each input at 3.4V.
3. This parameter is valid for any V
CC
between 0V and 2.1V with a transition time of up to 10msec. From V
CC
= 2.1V to V
CC
= 5V
±
10%, a
transition time of up to 100µsec is permitted.
1998 Jan 16
5
MCU
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