Datasheet

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SN54ABT620, SN74ABT620

OCTAL BUS TRANSCEIVERS

WITH 3-STATE OUTPUTS

SCBS113D – FEBRUARY 1991 – REVISED APRIL 1998

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

State-of-the-Art

EPIC-

ΙΙ

 BiCMOS Design

Significantly Reduces Power Dissipation

ESD Protection Exceeds 2000 V Per

MIL-STD-883, Method 3015; Exceeds 200 V

Using Machine Model (C = 200 pF, R = 0)

Latch-Up Performance Exceeds 500 mA Per

JESD 17

Typical V

OLP

(Output Ground Bounce) < 1 V

at V

= 5 V, T

= 25°C

High-Drive Outputs (–32-mA I

64-mA I

)

Package Options Include Plastic

Small-Outline (DW), Shrink Small-Outline

(DB), and Thin Shrink Small-Outline (PW)

Packages, Ceramic Chip Carriers (FK), and

Plastic (N) and Ceramic (J) DIPs

description

These octal bus transceivers provide for

asynchronous communication between data

buses. The control-function implementation

allows for maximum flexibility in timing. The

’ABT620 devices provide inverted data at the

outputs.

These devices allow data transmission from the

A bus to the B bus or from the B bus to the A bus,

depending on the logic levels at the output-enable

(OEAB and OEBA

) inputs.

The output-enable inputs can be used to disable the device so that the buses are effectively isolated. The

dual-enable configuration gives the transceivers the capability of storing data by simultaneously enabling OEAB

and OEBA

. When both OEAB and OEBA are enabled and all other data sources to the two sets of bus lines

are at high impedance, both sets of bus lines (16 total) remain at their last states. In this way, each output

reinforces its input in this configuration.

To ensure the high-impedance state during power up or power down, OEBA

should be tied to V

through a

pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

OEAB should be tied to GND through a pulldown resistor; the minimum value of the resistor is determined by

the current-sourcing capability of the driver.

The SN54ABT620 is characterized for operation over the full military temperature range of –55°C to 125°C. The

SN74ABT620 is characterized for operation from –40°C to 85°C.

UNLESS OTHERWISE NOTED this document contains PRODUCTION

DATA information current as of publication date. Products conform to

specifications per the terms of Texas Instruments standard warranty.

Production processing does not necessarily include testing of all

parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

EPIC-ΙΙB is a trademark of Texas Instruments Incorporated.

OEAB

GND

OEBA

SN54ABT620 ...J PACKAGE

SN74ABT620 . . . DB, DW, N, OR PW PACKAGE

(TOP VIEW)

3212019

910111213

SN54ABT620 . . . FK PACKAGE

(TOP VIEW)

OEAB

B6 OEBA

GND

Summary of content (11 pages)

PAGE 1
SN54ABT620, SN74ABT620 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCBS113D – FEBRUARY 1991 – REVISED APRIL 1998 D D D D SN54ABT620 . . . J PACKAGE SN74ABT620 . . . DB, DW, N, OR PW PACKAGE (TOP VIEW) OEAB A1 A2 A3 A4 A5 A6 A7 A8 GND 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 VCC OEBA B1 B2 B3 B4 B5 B6 B7 B8 SN54ABT620 . . . FK PACKAGE (TOP VIEW) description These octal bus transceivers provide for asynchronous communication between data buses.
PAGE 2
SN54ABT620, SN74ABT620 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCBS113D – FEBRUARY 1991 – REVISED APRIL 1998 FUNCTION TABLE INPUTS OEAB L L B data to A bus H B data to A bus, A data to B bus L H L Isolation H H A data to B bus logic symbol† 19 OEBA OEAB 1 OPERATION OEBA logic diagram (positive logic) OEBA EN1 EN2 OEAB A1 A2 A3 A4 A5 A6 A7 A8 2 18 1 3 1 1 2 17 4 16 5 15 6 14 7 13 8 12 9 11 19 1 B1 A1 2 18 B1 B2 B3 B4 B5 To Seven Other Channels B6 B7 B8 † This
PAGE 3
SN54ABT620, SN74ABT620 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCBS113D – FEBRUARY 1991 – REVISED APRIL 1998 recommended operating conditions (see Note 3) SN54ABT620 VCC VIH Supply voltage VIL VI Low-level input voltage IOH IOL High-level output current ∆t/∆v Input transition rise or fall rate High-level input voltage SN74ABT620 MIN MAX MIN MAX 4.5 5.5 4.5 5.5 2 2 0.8 Input voltage 0 Low-level output current Outputs enabled VCC –24 V V 0.
PAGE 4
SN54ABT620, SN74ABT620 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCBS113D – FEBRUARY 1991 – REVISED APRIL 1998 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VOH TEST CONDITIONS VCC = 4.5 V, VCC = 4.5 V, II = –18 mA IOH = –3 mA VCC = 5 V, VCC = 4 4.5 5V VOL VCC = 4 4.5 5V MIN MIN –1.2 MAX SN74ABT620 MIN –1.2 2.5 IOH = –3 mA IOH = –24 mA 3 3 3 2 2 IOH = –32 mA IOL = 48 mA 2* IOZH‡ IOZL‡ VCC = 5.5 V, VCC = 5.
PAGE 5
SN54ABT620, SN74ABT620 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCBS113D – FEBRUARY 1991 – REVISED APRIL 1998 switching characteristics over recommended ranges of supply voltage and operating free-air temperature, CL = 50 pF (unless otherwise noted) (see Figure 1) FROM (INPUT) TO (OUTPUT) tPLH tPHL A or B B or A tPZH tPZL OEBA A tPHZ tPLZ OEBA A tPZH tPZL OEAB B tPHZ tPLZ OEAB B PARAMETER VCC = 5 V, TA = 25°C SN54ABT620 MIN MAX MIN 1 4.1 1 MAX SN74ABT620 MIN MAX 1 1 4.
PAGE 6
SN54ABT620, SN74ABT620 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCBS113D – FEBRUARY 1991 – REVISED APRIL 1998 PARAMETER MEASUREMENT INFORMATION 7V S1 500 Ω From Output Under Test Open GND CL = 50 pF (see Note A) 500 Ω TEST S1 tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open 7V Open LOAD CIRCUIT 3V Timing Input 1.5 V 0V tw tsu 3V Input 1.5 V 1.5 V th 3V Data Input 1.5 V 1.5 V 0V 0V VOLTAGE WAVEFORMS PULSE DURATION VOLTAGE WAVEFORMS SETUP AND HOLD TIMES 3V 1.5 V Input 1.
PAGE 7
PACKAGE OPTION ADDENDUM www.ti.
PAGE 8
PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.
PAGE 9
PACKAGE MATERIALS INFORMATION www.ti.com 26-Jan-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant SN74ABT620DWR SOIC DW 20 2000 330.0 24.4 10.8 13.0 2.7 12.0 24.0 Q1 SN74ABT620NSR SO NS 20 2000 330.0 24.4 8.2 13.0 2.5 12.0 24.
PAGE 10
PACKAGE MATERIALS INFORMATION www.ti.com 26-Jan-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN74ABT620DWR SOIC DW 20 2000 367.0 367.0 45.0 SN74ABT620NSR SO NS 20 2000 367.0 367.0 45.
PAGE 11
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