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INTEGRATED CIRCUITS
74F245 Octal transceiver (3-State)
Product specification IC15 Data Handbook 1994 Nov 15
Philips Semiconductors
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F245
FEATURES
* Octal bidirectional bus interface * 3-State buffer outputs sink 64mA * 15mA source current * Outputs are placed in high impedance state during power-off
conditions
PIN CONFIGURATION
T/R 1 A0 A1 A2 A3 A4 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
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 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. TYPE 74F245 TYPICAL PROPAGATION DELAY 4.0ns
A5 A6 A7
GND 10
SF00198
TYPICAL SUPPLY CURRENT (TOTAL) 70mA
ORDERING INFORMATION
DESCRIPTION 20-Pin Plastic DIP 20-Pin Plastic SO 20-Pin Plastic SSOP Type II COMMERCIAL RANGE VCC = 5V 10%, Tamb = 0C to +70C N74F245N N74F245D N74F245DB DRAWING NUMBER SOT146-1 SOT163-1 SOT339-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS A0-A7, B0-B7 OE T/R A0-A7 B0-B7 Data inputs Output Enable input (active Low) Transmit/Receive input A port outputs B port outputs DESCRIPTION 74F (U.L.) HIGH/LOW 3.5/1.0 1.0/2.0 1.0/2.0 150/40 750/106.7 LOAD VALUE HIGH/LOW 70A/0.6mA 20A/1.2mA 20A/1.2mA 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.
LOGIC SYMBOL
2 3 4 5 6 7 8 9
IEC/IEEE SYMBOL
19 1 G3 3EN1 (BA) 3EN1 (AB)
1 A0 19 1 OE T/R B0 B1 B2 B3 B4 B5 B6 B7 A1 A2 A3 A4 A5 A6 A7 2 3 4 5 6 7 18 VCC = Pin 20 GND = Pin 10 17 16 15 14 13 12 11 8 9 2 18 17 16 15 14 13 12 11
SF00199
SF00200
November 15, 1994
2
853-0025 14256
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F245
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
FUNCTION TABLE
INPUTS OE L L H T/R L H X OUTPUTS Bus B data to Bus A Bus A data to Bus B 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 VCC VIN IIN VOUT IOUT 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
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
November 15, 1994
3
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F245
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.) SYMBOL PARAMETER TEST CONDITIONS1 10% VCC 5% VCC 10% VCC 5% VCC 10% VCC 5% VCC 10% VCC 5% VCC 0.42 -0.73 LIMITS MIN 2.4 2.7 2.0 2.0 0.30 0.35 0.50 0.50 0.55 0.55 -1.2 100 1 20 -1.2 70 -600 -60 VCC = MAX -100 60 VCC = MAX 70 75 -150 -225 87 100 110 3.4 TYP2 MAX UNIT V V V V V V V V V A mA A mA A A mA mA mA mA mA
A0-A7, B0 B7 A0 A7 B0-B7 VO OH High-level High level output voltage B0-B7 B0 B7
VCC = MIN, VIL = MAX MAX, VIH = MIN
IO = -3mA 3mA OH
IO = -15mA 15mA OH IOL = 20mA IOL = 24mA IOL = MAX IOL = MAX
A0-A7 A0 A7 VOL Low-level output voltage B0-B7 VOL VIK II IIH IIL IIH+IOZH IIL+IOZL IOS Low-level output voltage 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 Short circuit output current3 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 B0-B7
VCC = MIN, MIN VIL = MAX, VIH = MIN VCC = MIN, VIL = MAX, VIH = MIN
VCC = MIN, II = IIK VCC = 5.5V, VI = 7.0V VCC = 5.5V, VI = 5.5V VCC = MAX, VI = 2.7V VCC = MAX, VI = 0.5V VCC = MAX, VO = 2.7V VCC = MAX, VO = 0.5V
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.
AC ELECTRICAL CHARACTERISTICS
LIMITS SYMBOL PARAMETER TEST CONDITION VCC = +5.0V Tamb = +25C CL = 50pF, RL = 500 MIN tPLH tPHL tPZH tPZL tPHZ tPLZ Propagation delay An to Bn, Bn to An Output Enable time to High or Low level Output Disable time from High or Low level Waveform 1 Waveform 2 Waveform 3 Waveform 2 Waveform 3 2.5 2.5 2.0 3.5 2.5 1.0 TYP 3.5 4.0 4.5 5.5 5.0 3.5 MAX 6.0 6.0 7.0 8.0 6.5 6.0 VCC = +5.0V 10% Tamb = 0C to +70C CL = 50pF, RL = 500 MIN 2.5 2.5 2.0 3.5 2.0 1.0 MAX 7.0 7.0 8.0 9.0 7.5 7.0 ns ns ns UNIT
November 15, 1994
4
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F245
AC WAVEFORMS
For all waveforms, VM = 1.5V.
An, Bn
VM tPLH
VM tPHL
Bn, An
VM
VM
SF00202
Waveform 1. Propagation Delay for Non-Inverting Output
OE VM tPZH VM tPHZ
OE VM tPZL An, Bn VM VOH-0.3V 0V VM VOL+0.3V VM tPLZ
An, Bn
SF00203
SF00204
Waveform 2. 3-State Output Enable Time to High Level and Output Disable Time from High Level
Waveform 3. 3-State Output Enable Time to Low Level and Output Disable Time from Low Level
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
November 15, 1994
5
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F245
DIP20: plastic dual in-line package; 20 leads (300 mil)
SOT146-1
1994 Nov 15
6
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F245
SO20: plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
1994 Nov 15
7
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F245
NOTES
1994 Nov 15
8
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F245
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm
SOT339-1
1994 Nov 15
9
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F245
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 1996 All rights reserved. Printed in U.S.A. (print code) Document order number: Date of release: July 1994 9397-750-05104

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