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INTEGRATED CIRCUITS
74F1245 Octal transceiver (3-State)
Product specification IC15 Data Handbook 1995 Mar 01
Philips Semiconductors
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F1245
FEATURES
* Same function and pinout as 74F245 * High impedance NPN base inputs for reduced loading (70A in
Low and High states)
DESCRIPTION
The 74F1245 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 up to 15mA, producing very good capacitive drive characteristics. The device features an Output Enable (OE) input for easy cascading and Transmit/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.
* Useful in applications where light loading bus loading or direct
interface with output of a MOS microprocessor is desired
* Octal bidirectional bus interface * Glitch free during 3-State power up and power down * 3-State buffer outputs sink 64mA and source 15mA
TYPE 74F1245 TYPICAL PROPAGATION DELAY 5.0ns TYPICAL SUPPLY CURRENT (TOTAL) 115mA
ORDERING INFORMATION
DESCRIPTION 20-Pin Plastic DIP 20-Pin Plastic SOL COMMERCIAL RANGE VCC = 5V 10%, Tamb = 0C to +70C N74F1245N N74F1245D DRAWING NUMBER SOT146-1 SOT163-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS A0-A7, B0-B7 OE T/R A0-A7 B0-B7 DESCRIPTION A and B port inputs Output Enable input (active Low) Transmit/Receive input A port outputs B port outputs 74F (U.L.) HIGH/LOW 3.5/0.117 2.0/0.033 2.0/0.033 150/40 750/106.7 LOAD VALUE HIGH/LOW 70A/70A 40A/20A 40A/20A 3.0mA/24mA 15mA/64mA
NOTE: One (1.0) FAST unit load is defined as: 20A in the High state and 0.6mA in the Low state.
PIN CONFIGURATION
T/R 1 A0 A1 A2 A3 A4 A5 A6 A7 2 3 4 5 6 7 8 9 20 VCC 19 OE 18 B0 17 B1 16 B2 15 B3 14 B4 13 B5 12 B6 11 B7
LOGIC SYMBOL
2 3 4 5 6 7 8 9
A0 19 1 OE T/R B0
A1
A2
A3
A4
A5
A6
A7
B1
B2
B3
B4
B5
B6
B7
GND 10
18 VCC = Pin 20 GND = Pin 10
17
16
15
14
13
12
11
SF00198
SF00199
1995 Mar 01
2
853-0885 14921
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F1245
LOGIC SYMBOL (IEEE/IEC)
19 1 G3 3EN1 (BA) 3EN2 (AB)
FUNCTION TABLE
INPUTS OE L L T/R L H X INPUTS/OUTPUTS An A=B INPUTS Z Bn INPUTS B=A Z
1 2 3 4 5 6 7 8 9 2 18 17 16 15 14 13 12 11
H
H = High voltage level L = Low voltage level X = Don't care Z = High impedance "off" state
SF00649
LOGIC DIAGRAM
A0 2 A1 3 A2 4 A3 5 A4 6 A5 7 A6 8 A7 9
OE
19 1 18 B0 17 B1 16 B2 15 B3 14 B4 13 B5 12 B6 11 B7
T/R VCC = Pin 20 GND = Pin 10
SF00201
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 VCC VIN IIN VOUT IO OUT Tamb Tstg Supply voltage Input voltage Input current Voltage applied to output in High output state A0-A7 Current applied to output in Low output state Operating free-air temperature range Storage temperature range B0-B7 PARAMETER RATING -0.5 to +7.0 -0.5 to +7.0 -30 to +5 -0.5 to +5.5 48 128 0 to +70 -65 to +150 UNIT V V mA V mA mA C C
1995 Mar 01
3
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F1245
RECOMMENDED OPERATING CONDITIONS
LIMITS SYMBOL VCC VIH VIL IIK IO OH Supply voltage High-level input voltage Low-level input voltage Input clamp current A0-A7 High-level High level output current B0-B7 A0-A7 IO OL Tamb Low-level Low level output current Operating free-air temperature range B0-B7 0 PARAMETER MIN 4.5 2.0 0.8 -18 -3 -15 24 64 70 NOM 5.0 MAX 5.5 UNIT V V V mA mA mA mA mA C
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.) LIMITS SYMBOL PARAMETER TEST CONDITIONSNO TAG 10% VCC 5% VCC 10% VCC 5% VCC 10% VCC 5% VCC 10% VCC 5% VCC MIN 2.4 2.7 2.0 2.0 0.35 0.35 0.30 0.42 -0.73 0.50 0.50 0.55 0.55 -1.2 100 100 40 -20 70 -70 -60 -100 120 VCC = MAX 116 110 -150 -225 155 150 165 3.3 TYP
NO TAG
MAX
UNIT V V V V V V V V V A A A A A A mA mA mA mA mA
A0-A7, A0-A7 B0-B7 VOH High-level out ut voltage output B0-B7
VCC = MIN, VIL = MAX MAX, VIH = MIN
IOH = -3mA
IOH = -15mA
A0-A7 VOL Low-level out ut voltage output B0-B7 VIK II IIH IIL IIH+IOZH IIL+IOZL IOS Input clamp voltage Input current at maximum input voltage High-level input current Low-level input current Off-state output current High-level voltage applied Off-state output current Low-level voltage applied Short-circuit output currentNO TAG A0-A7 B0-B7 ICCH ICC Supply current (total) ICCL ICCZ OE, T/R A0-A7, B0-B7 OE, T/R only OE, T/R only
VCC = MIN, VIL = MAX MAX, VIH = MIN
IOL = 24mA IOL = 48mA IOL = 64mA
VCC = MIN, II = IIK VCC = 0.0V, VI = 7.0V VCC = 0.0V, VI = 5.5V VCC = MAX, VI = 2.7V VCC = MAX, VI = 0.5V VCC = MAX, VO = 2.7V VCC = MAX, VO = 0.5V VCC = MAX
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 = 25C. 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. 1995 Mar 01 4
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F1245
AC ELECTRICAL CHARACTERISTICS
LIMITS SYMBOL PARAMETER TEST CONDITION VCC = +5.0V Tamb = +25C CL = 50pF, RL = 500 MIN tPLH tPHL tPZH tPZL Propagation delay An to Bn, Bn to An Output Enable time OE to An or Bn Waveform NO TAG Waveform NO TAG Waveform NO TAG Waveform NO TAG Waveform NO TAG 2.0 2.5 3.0 4.0 TYP 4.0 5.0 6.0 7.5 MAX 6.5 7.5 8.0 10.0 VCC = +5.0V 10% Tamb = 0C to +70C CL = 50pF, RL = 500 MIN 1.5 2.0 2.5 3.5 MAX 7.0 8.0 9.0 11.0 ns UNIT
ns
tPHZ tPLZ
Output Disable time OE to An or Bn
2.0 4.0
5.0 7.0
8.0 10.0
1.5 4.0
9.0 11.0
ns
AC WAVEFORMS
For all waveforms, VM = 1.5V.
OE An, Bn VM tPLH VM tPHL An, Bn VM VM VM VOL+0.3V VM tPZL VM tPLZ
Bn, An
SF00202
SF00204
Waveform 1. Propagation Delay for Non-Inverting Output
Waveform 3. 3-State Output Enable Time to Low Level and Output Disable Time from Low Level
OE VM tPZH VM tPHZ VOH-0.3V 0V
VM An, Bn
SF00203
Waveform 2. 3-State Output Enable Time to High Level and Output Disable Time from High Level
1995 Mar 01
5
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F1245
TEST CIRCUIT AND WAVEFORMS
VCC 7.0V VIN PULSE GENERATOR RT D.U.T. VOUT RL NEGATIVE PULSE 90% VM 10% tTHL (tf ) CL RL tTLH (tr ) 90% POSITIVE PULSE 10% tTHL (tf ) AMP (V) 90% VM tw 10% 0V tw VM 10% tTLH (tr ) 0V AMP (V)
90%
Test Circuit for Open Collector Outputs SWITCH POSITION TEST tPLZ tPZL All other SWITCH closed closed open
VM
Input Pulse Definition
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.
INPUT PULSE REQUIREMENTS family amplitude VM 74F 3.0V 1.5V rep. rate 1MHz tw 500ns tTLH 2.5ns tTHL 2.5ns
SF00128
1995 Mar 01
6
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F1245
DIP20: plastic dual in-line package; 20 leads (300 mil)
SOT146-1
1995 Mar 01
7
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F1245
SO20: plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
1995 Mar 01
8
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F1245
NOTES
1995 Mar 01
9
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F1245
DEFINITIONS
Data Sheet Identification
Objective Specification
Product Status
Formative or in Design
Definition
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 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. 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.
Preliminary Specification
Preproduction Product
Product Specification
Full Production
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 appliances, 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. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088-3409 Telephone 800-234-7381 Philips Semiconductors and Philips Electronics North America Corporation register eligible circuits under the Semiconductor Chip Protection Act. (c) Copyright Philips Electronics North America Corporation 1995 All rights reserved. Printed in U.S.A.

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