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INTEGRATED CIRCUITS
74F621 Octal bus transceiver, non-inverting (open collector)
Product specification IC15 Data Handbook 1996 Jan 05
Philips Semiconductors
Philips Semiconductors
Product specification
Octal bus transceiver, non-inverting (open collector)
74F621
FEATURES
* High-impedance NPN base inputs for reduced loading
(20A in High and Low states)
PIN CONFIGURATION
OEAB 1 20 19 18 17 16 15 14 13 12 11 VCC OEBA B0 B1 B2 B3 B4 B5 B6 B7
* Octal bidirectional bus interface * Open collector outputs sink 64mA * Non-inverting
DESCRIPTION
The 74F621 is an octal transceiver featuring non-inverting open collector bus-compatible outputs in both send and receive directions. The outputs are capable of sinking 64mA, providing very good capacitive drive characteristics. This octal bus transceiver is designed for asynchronous two-way communication between data buses. The control function implementation allows for maximum flexibility in timing. The device allows data transmission from the A bus to the B bus or from the B bus to the A bus, depending upon the logic levels at the Enable inputs (OEBA and OEAB). The Enable inputs can be used to disable the device so that the buses are effectively isolated. The dual-enable configuration gives the 74F621 the capability to store data by the simultaneous enabling of OEBA and OEAB. Each output reinforces its input in this transceiver configuration. Thus, when both control inputs are enabled and all other data sources to the two sets of the bus lines are at high impedance, both sets of bus lines (16 in all) will remain in their last states.
A0 2 A1 3 A2 4 A3 5 A4 6 A5 7 A6 8 A7 9 GND 10
SF01135
TYPE 74F621
TYPICAL PROPAGATION DELAY 8.0ns
TYPICAL SUPPLY CURRENT (TOTAL) 105mA
ORDERING INFORMATION
DESCRIPTION 20-pin plastic DIP 20-pin plastic SOL COMMERCIAL RANGE VCC = 5V 10%, Tamb = 0C to +70C N74F621N N74F621D PKG DWG # SOT146-1 SOT163-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS A0 - A7, B0 - B7 OEBA, OEAB A0 - A7 B0 - B7 Data inputs Output Enable inputs Data outputs Data outputs DESCRIPTION 74F(U.L.) HIGH/LOW 1.0/0.033 1.0/0.033 OC/40 OC/106.7 LOAD VALUE HIGH/LOW 20A/20A 20A/20A OC/24mA OC/64mA
NOTE: One (1.0) FAST unit load is defined as: 20A in the High state and 0.6mA in the Low state. OC = Open Collector.
1996 Jan 05
2
853-0380 16185
Philips Semiconductors
Product specification
Octal bus transceiver, non-inverting (open collector)
74F621
LOGIC SYMBOL
2 3 4 5 6 7 8 9
LOGIC SYMBOL (IEEE/IEC)
19 1 EN1 EN2 18 2 3
A0
A1
A2
A3
A4
A5
A6
A7
2
1
1 19
OEAB OEBA 4 B0 B1 B2 B3 B4 B5 B6 B7 5 6 7
17 16 15 14 13
18 VCC = Pin 20 GND = Pin 10
17
16
15
14
13
12
11
SF01126
9
8
12 11
SF01137
LOGIC DIAGRAM
19 OEBA OEAB 1
FUNCTION TABLE
INPUTS OPERATING MODES OEBA L OEAB L H L H B data to A bus A data to B bus OFF B data to A bus L A data to B bus
A0 2
18
B0
H H
A1
3
17
B1
A2
4
16
B2
A3 5
15
B3
H= L= X= OFF=
High voltage level Low voltage level Don't care High if pull-up resistor is connected to open collector output
A4 6
14
B4
A5 7
13
B5
A6 8
12
B6
A7
9
11
B7
VCC = GND =
Pin 20 Pin 10
SF01130
1996 Jan 05
3
Philips Semiconductors
Product specification
Octal bus transceiver, non-inverting (open collector)
74F621
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
RECOMMENDED OPERATING CONDITIONS
LIMITS SYMBOL VCC VIH VIL IIK VOH IO OL Tamb Supply voltage High-level input voltage Low-level input voltage Input clamp current High-level output current A0-A7 Low level output current Low-level Operating free-air temperature range B0-B7 0 PARAMETER MIN 4.5 2.0 0.8 -18 4.5 24 64 70 NOM 5.0 MAX 5.5 UNIT V V V mA V mA mA C
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.) LIMITS SYMBOL IOH PARAMETER High-level output current A0-A7 A0 A7 VO OL Low-level output voltage B0-B7 B0 B7 VIK II IIH IIL ICC Input clamp voltage Input current at maximum in ut input voltage OEBA, OEAB others TEST CONDITIONSNO TAG MIN VCC = MIN, VIL = MAX, VIH=MIN, VOH = MAX VCC = MIN, VIL = MAX MAX, VIH = MIN, VCC = MIN, II = IIK VCC = MAX, VI = 7.0V VCC = 0.0V, VI = 5.5V VCC = MAX, VI = 2.7V VCC = MAX, VI = 0.5V ICCH ICCL VCC = MAX OEBA = OEAB = A0-A7 = 4.5V OEBA = OEAB = 4.5V, A0-A7 = GND 105 105 IO = 24mA OL IOL = 48mA IOL = 64mA 10%VCC 5%VCC 10%VCC 5%VCC 0.35 0.35 0.38 0.42 -0.73 TYP
NO TAG
UNIT MAX 250 0.50 0.50 0.55 0.55 -1.2 100 1 20 -20 140 140 A V V V V V A mA A A mA mA
High-level input current Low-level input current Supply current (total)
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.
1996 Jan 05
4
Philips Semiconductors
Product specification
Octal bus transceiver, non-inverting (open collector)
74F621
AC ELECTRICAL CHARACTERISTICS
LIMITS SYMBOL PARAMETER TEST CONDITION VCC = +5V Tamb = +25C CL = 50pF, RL = 500 MIN tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL Propagation delay An to Bn Propagation delay Bn to An Propagation delay OEBA to An Propagation delay OEAB to Bn Waveform 1 Waveform 1 Waveform 2 Waveform 3 6.0 4.0 6.0 3.5 6.0 3.5 7.0 3.5 TYP 9.5 6.0 9.0 5.5 10.0 6.5 12.0 6.5 MAX 12.0 8.0 12.0 7.5 13.5 10.5 15.0 9.5 VCC = +5V 10% Tamb = 0C to +70C CL = 50pF, RL = 500 MIN 5.5 3.5 5.5 3.0 5.5 3.0 6.0 3.0 MAX 13.0 8.5 12.5 8.0 14.0 11.0 17.0 10.0 ns ns ns ns UNIT
AC WAVEFORMS
For all waveforms, VM = 1.5V.
An or Bn
VM tPLH
VM tPHL
Bn or An
VM
VM
SF01132
Waveform 1. For Non-Inverting Outputs
OEBA
VM tPLH
VM tPHL
OEAB
VM tPHL
VM tPLH
Bn
VM
VM
Bn
VM
VM
SF01138
SF01139
Waveform 2. Propagation Delay, OEBA to An
Waveform 3. Propagation Delay, OEAB to Bn
1996 Jan 05
5
Philips Semiconductors
Product specification
Octal bus transceiver, non-inverting (open collector)
74F621
TYPICAL PROPAGATION DELAYS VERSUS LOAD FOR OPEN COLLECTOR OUTPUTS
18 16 14 12 10 Propagation delay (ns) 8 6 4 2 0 0 100 200 300 400 Load Resistor (W) 500 600
SF01153
tPLH
tPHL
NOTE: When using open-collector parts, the value of the pull-up resistor greatly affects the value of the tPLH. For example, changing the pull-up resistor value from 500W to 100W will improve the tPLH up to 50% with only slight increase in the tPHL. However, if the pull-up resistor is changed, the user must take certain that the total IOL current through the resistor and the total IIL's of the receivers do not exceed the IOL maximum specification.
TEST CIRCUIT AND WAVEFORMS
VCC 7.0V 90% VIN PULSE GENERATOR RT D.U.T. VOUT RL NEGATIVE PULSE 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 90% AMP (V)
Test Circuit for Open Collector Outputs
VM
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 Definition INPUT PULSE REQUIREMENTS family amplitude VM 74F 3.0V 1.5V rep. rate 1MHz tw 500ns tTLH 2.5ns tTHL 2.5ns
SF00027
1996 Jan 05
6
Philips Semiconductors
Product specification
Octal bus transceiver, non-inverting (open collector)
74F621
DIP20: plastic dual in-line package; 20 leads (300 mil)
SOT146-1
1996 Jan 05
7
Philips Semiconductors
Product specification
Octal bus transceiver, non-inverting (open collector)
74F621
SO20: plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
1996 Jan 05
8
Philips Semiconductors
Product specification
Octal bus transceiver, non-inverting (open collector)
74F621
NOTES
1996 Jan 05
9
Philips Semiconductors
Product specification
Octal bus transceiver, non-inverting (open collector)
74F621
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 9397-750-05147

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