Philips Semiconductors
74F245
Octal transceiver (3-State)
Product specification 1994 Nov 15
INTEGRATED CIRCUITS
IC15 Data Handbook
Philips Semiconductors Product specification
74F245Octal transceiver (3-State)
2
November 15, 1994 853–0025 14256
FEATURES
•Octal bidirectional bus interface
•3-State buf fer outputs sink 64mA
•15mA source current
•Outputs are placed in high impedance state during power-off
conditions
DESCRIPTION
The 74F245 is an octal transceiver featuring non-inverting 3-State
bus compatible outputs in both transmit and receive directions. The
B port outputs are capable of sinking 64mA and sourcing 15mA,
producing very good capacitive drive characteristics. The device
features an Output Enable (OE) input for easy cascading and
T ransmit/Receive (T/R) input for direction control. The 3-State
outputs, B0–B7, have been designed to prevent output bus loading if
the power is removed from the device.
PIN CONFIGURATION
SF00198
1
2
3
4
5
6
7
8
9
10 11
12
13
14
15
16
17
18
19
20
T/R
A0
A1
A2
A3
A4
A5
A6
A7
GND
VCC
OE
B0
B1
B2
B3
B4
B6
B5
B7
TYPE TYPICAL PROPAGATION DELAY TYPICAL SUPPLY CURRENT (TOTAL)
74F245 4.0ns 70mA
ORDERING INFORMATION
DESCRIPTION COMMERCIAL RANGE
VCC = 5V ±10%, Tamb = 0°C to +70°CDRAWING NUMBER
20-Pin Plastic DIP N74F245N SOT146-1
20-Pin Plastic SO N74F245D SOT163-1
20-Pin Plastic SSOP Type II N74F245DB SOT339-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS DESCRIPTION 74F (U.L.) HIGH/LOW LOAD VALUE HIGH/LOW
A0–A7, B0–B7 Data inputs 3.5/1.0 70µA/0.6mA
OE Output Enable input (active Low) 1.0/2.0 20µA/1.2mA
T/R T ransmit/Receive input 1.0/2.0 20µA/1.2mA
A0–A7 A port outputs 150/40 3.0mA/24mA
B0–B7 B port outputs 750/106.7 15mA/64mA
NOTE: One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state.
LOGIC SYMBOL
B2 B3 B4 B5
16 15 14 13
234
VCC = Pin 20
GND = Pin 10
SF00199
B1
17
B0
18
19
1
OE
T/R
A0 A1 A2 A3 A4 A5
567
B6 B7
12 11
A6 A7
89
IEC/IEEE SYMBOL
SF00200
G3
19
3EN1 (BA)
13EN1 (AB)
∇ 1
2 ∇
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
Philips Semiconductors Product specification
74F245Octal transceiver (3-State)
November 15, 1994 3
LOGIC DIAGRAM
SF00201
18
B0 17
B1 16
B2 15
B3 14
B4 13
B5 12
B6 11
B7
A0 A1 A2 A3 A4 A5 A6 A7
23456789
19
1
OE
T/R
VCC = Pin 20
GND = Pin 10
FUNCTION TABLE
INPUTS
OUTPUTS
OE T/R
OUTPUTS
L L Bus B data to Bus A
L H Bus A data to Bus B
H X Z
H = High voltage level
L = Low voltage level
X = Don’t care
Z = High impedance “off” state
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limits set forth in this table may impair the useful life of the device.
Unless otherwise noted these limits are over the operating free-air temperature range.)
SYMBOL PARAMETER RATING UNIT
VCC Supply voltage –0.5 to +7.0 V
VIN Input voltage –0.5 to +7.0 V
IIN Input current –30 to +5 mA
VOUT Voltage applied to output in High output state –0.5 to +5.5 V
I
Current a
pp
lied to out
p
ut in Low out
p
ut state
A0–A7 48 mA
I
OUT
C
u
rrent
applied
to
o
u
tp
u
t
in
Lo
w
o
u
tp
u
t
state
B0–B7 128 mA
Tamb Operating free-air temperature range 0 to +70 °C
Tstg Storage temperature range –65 to +150 °C
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
LIMITS
UNIT
SYMBOL
PARAMETER
MIN NOM MAX
UNIT
VCC Supply voltage 4.5 5.0 5.5 V
VIH High-level input voltage 2.0 V
VIL Low-level input voltage 0.8 V
IIK Input clamp current –18 mA
IO
High level out
p
ut current
A0–A7 –3 mA
I
OH
High
-
le
v
el
o
u
tp
u
t
c
u
rrent
B0–B7 –15 mA
IO
Low level out
p
ut current
A0–A7 24 mA
I
OL
Lo
w-
le
v
el
o
u
tp
u
t
c
u
rrent
B0–B7 64 mA
Tamb Operating free-air temperature range 0 +70 °C
Philips Semiconductors Product specification
74F245Octal transceiver (3-State)
November 15, 1994 4
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
PARAMETER
TEST CONDITIONS1
LIMITS
SYMBOL
PARAMETER
TEST
CONDITIONS1
MIN TYP2MAX
A0 A7 B0 B7
IO= 3mA
±10% VCC 2.4 V
VO
High level out
p
ut voltage
A0
–
A7
,
B0
–
B7
VCC = MIN,
VIL = MAX
I
OH = –
3mA
±5% VCC 2.7 3.4 V
V
OH
High
-
le
v
el
o
u
tp
u
t
v
oltage
B0 B7
V
IL =
MAX
,
VIH = MIN
IO= 15mA
±10% VCC 2.0 V
B0
–
B7
I
OH = –
15mA
±5% VCC 2.0 V
A0 A7
VCC = MIN
IOL = 20mA ±10% VCC 0.30 0.50 V
VOL Low-level output voltage
A0
–
A7
VCC
=
MIN
,
VIL = MAX,
V MIN
IOL = 24mA ±5% VCC 0.35 0.50 V
B0–B7
V
IH =
MIN
IOL = MAX ±10% VCC 0.55 V
VOL Low-level output voltage B0–B7 VCC = MIN,
VIL = MAX,
VIH = MIN IOL = MAX ±5% VCC 0.42 0.55 V
VIK Input clamp voltage VCC = MIN, II = IIK –0.73 –1.2 V
I
Input current at maximum OE, T/R VCC = 5.5V, VI = 7.0V 100 µA
I
Iinput voltage A0–A7, B0–B7 VCC = 5.5V, VI = 5.5V 1 mA
IIH High-level input current OE, T/R only VCC = MAX, VI = 2.7V 20 µA
IIL Low-level input current OE, T/R only VCC = MAX, VI = 0.5V –1.2 mA
IIH+IOZH Off-state output current
High level voltage applied VCC = MAX, VO = 2.7V 70 µA
IIL+IOZL Off-state output current
Low level voltage applied VCC = MAX, VO = 0.5V –600 µA
IOS
Short circuit out
p
ut current3
A0–A7
VCC = MAX
–60 –150 mA
I
OS
Short
-
circ
u
it
o
u
tp
u
t
c
u
rrent3
B0–B7
V
CC =
MAX
–100 –225 mA
ICCH 60 87 mA
ICC Supply current (total) ICCL VCC = MAX 70 100 mA
ICCZ 75 110 mA
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.
2. All typical values are at VCC = 5V, Tamb = 25°C.
3. Not more than one output should be shorted at a time. For testing IOS, the use of high-speed test apparatus and/or sample-and-hold
techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting
of a High output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any
sequence of parameter tests, IOS tests should be performed last.
AC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL PARAMETER TEST
CONDITION
VCC = +5.0V
Tamb = +25°C
CL = 50pF, RL = 500Ω
VCC = +5.0V ± 10%
Tamb = 0°C to +70°C
CL = 50pF, RL = 500ΩUNIT
MIN TYP MAX MIN MAX
tPLH
tPHL Propagation delay
An to Bn, Bn to An W aveform 1 2.5
2.5 3.5
4.0 6.0
6.0 2.5
2.5 7.0
7.0 ns
tPZH
tPZL Output Enable time
to High or Low level W aveform 2
W aveform 3 2.0
3.5 4.5
5.5 7.0
8.0 2.0
3.5 8.0
9.0 ns
tPHZ
tPLZ Output Disable time
from High or Low level W aveform 2
W aveform 3 2.5
1.0 5.0
3.5 6.5
6.0 2.0
1.0 7.5
7.0 ns
Philips Semiconductors Product specification
74F245Octal transceiver (3-State)
November 15, 1994 5
AC WAVEFORMS
For all waveforms, VM = 1.5V.
VM
VM
VM
VM
Bn, An
An, Bn
tPLH tPHL
SF00202
W aveform 1. Propagation Delay for Non-Inverting Output
VOH–0.3V
VM
VM
VM
An, Bn
tPZH tPHZ
SF00203
OE
0V
W aveform 2. 3-State Output Enable Time to High Level and
Output Disable Time from High Level
VOL+0.3V
VM
VM
VM
An, Bn
tPZL tPLZ
SF00204
OE
W aveform 3. 3-State Output Enable Time to Low Level and
Output Disable Time from Low Level
TEST CIRCUIT AND WAVEFORMS
tw90%
VM
10%
90%
VM10%
90%
VM10%
90%
VM
10%
NEGATIVE
PULSE
POSITIVE
PULSE
tw
AMP (V)
0V
0V
tTHL (tf )
INPUT PULSE REQUIREMENTS
rep. rate twtTLH tTHL
1MHz 500ns 2.5ns 2.5ns
Input Pulse Definition
VCC
family
74F
D.U.T.
PULSE
GENERATOR
RL
CL
RT
VIN VOUT
Test Circuit for Open Collector Outputs
DEFINITIONS:
RL= Load resistor;
see AC electrical characteristics for value.
CL= Load capacitance includes jig and probe capacitance;
see AC electrical characteristics for value.
RT= Termination resistance should be equal to ZOUT of
pulse generators.
tTHL (tf )
tTLH (tr )
tTLH (tr )AMP (V)
amplitude
3.0V 1.5V
VM
RL
7.0V
SF00128
TEST SWITCH
tPLZ closed
tPZL closed
All other open
SWITCH POSITION
Philips Semiconductors Product specification
74F245Octal transceiver (3-State)
1994 Nov 15 6
DIP20: plastic dual in-line package; 20 leads (300 mil) SOT146-1
Philips Semiconductors Product specification
74F245Octal transceiver (3-State)
1994 Nov 15 7
SO20: plastic small outline package; 20 leads; body width 7.5 mm SOT163-1
Philips Semiconductors Product specification
74F245Octal transceiver (3-State)
1994 Nov 15 8
NOTES
Philips Semiconductors Product specification
74F245Octal transceiver (3-State)
1994 Nov 15 9
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm SOT339-1
Philips Semiconductors Product specification
74F245Octal transceiver (3-State)
Philips Semiconductors and Philips Electronics North America Corporation reserve the right to make changes, without notice, in the products,
including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips
Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright,
or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask
work right infringement, unless otherwise specified. Applications that are described herein for any of these products are for illustrative purposes
only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing
or modification.
LIFE SUPPORT APPLICATIONS
Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appl iances, devices,
or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected
to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips
Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully
indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale.
This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips
Semiconductors reserves the right to make changes at any time without notice in order to improve design
and supply the best possible product.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone 800-234-7381
DEFINITIONS
Data Sheet Identification Product Status Definition
Objective Specification
Preliminary Specification
Product Specification
Formative or in Design
Preproduction Product
Full Production
This data sheet contains the design target or goal specifications for product development. Specifications
may change in any manner without notice.
This data sheet contains Final Specifications. Philips Semiconductors reserves the right to make changes
at any time without notice, in order to improve design and supply the best possible product.
Philips Semiconductors and Philips Electronics North America Corporation
register eligible circuits under the Semiconductor Chip Protection Act.
Copyright Philips Electronics North America Corporation 1996
All rights reserved. Printed in U.S.A.
(print code) Date of release: July 1994
Document order number: 9397-750-05104