Texas Instruments SN74ABTE16245DGGR, SN74ABTE16245DL, SN74ABTE16245DLR Datasheet
SN54ABTE16245, SN74ABTE16245
16-BIT INCIDENT-WAVE SWITCHING BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS226G – JULY 1993 – REVISED JUNE 1999
D
Members of the Texas Instruments
Widebus
D
State-of-the-Art
Family
EPIC-ΙΙB
BiCMOS Design
Significantly Reduces Power Dissipation
D
Support the VME64 ETL Specification
D
Reduced, TTL-Compatible, Input Threshold
Range
D
High-Drive Outputs (I
= –60 mA,
OH
IOL = 90 mA) Support 25-Ω Incident-Wave
Switching
D
VCCBIAS Pin Minimizes Signal Distortion
During Live Insertion
D
Internal Pullup Resistor on OE Keeps
Outputs in High-Impedance State During
Power Up or Power Down
D
Distributed VCC and GND Pin Configuration
Minimizes High-Speed Switching Noise
D
Equivalent 25-Ω Series Damping Resistor
on B Port
D
Bus Hold on Data Inputs Eliminates the
Need for External Pullup/Pulldown
Resistors
D
Package Options Include Plastic Shrink
Small-Outline (DL) and Thin Shrink
Small-Outline (DGG) Packages and 380-Mil
Fine-Pitch Ceramic Flat (WD) Packages
Using 25-mil Center-to-Center Spacings
SN54ABTE16245 . . . WD P ACKAGE
SN74ABTE16245 . . . DGG OR DL PACKAGE
1DIR
1B1
2B1
GND
1B2
2B2
V
CC
1B3
2B3
GND
1B4
2B4
1B5
2B5
GND
1B6
2B6
V
CC
1B7
2B7
GND
1B8
2B8
2DIR
(TOP VIEW)
1
48
2
47
3
46
4
45
5
44
6
43
7
42
8
41
9
40
10
39
11
38
12
37
13
36
14
35
15
34
16
33
17
32
18
31
19
30
20
29
21
28
22
27
23
26
24
25
V
CC
1A1
2A1
GND
1A2
2A2
V
CC
1A3
2A3
GND
1A4
2A4
1A5
2A5
GND
1A6
2A6
V
CC
1A7
2A7
GND
1A8
2A8
OE
BIAS
description
The ’ABTE16245 devices are 16-bit (dual-octal) noninverting 3-state transceivers designed for synchronous
two-way communication between data buses. The control-function implementation minimizes external timing
requirements. These devices can be used as two 8-bit transceivers or one 16-bit transceiver. They allow data
transmission from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the
direction-control (DIR) input. The output-enable (OE
are effectively isolated. When OE is low , the device is active.
The B port has an equivalent 25-Ω series output resistor to reduce ringing. Active bus-hold inputs are also on
the B port to hold unused or floating inputs at a valid logic level.
The A port provides for the precharging of the outputs via VCCBIAS, which establishes a voltage between 1.3 V
and 1.7 V when VCC is not connected.
The SN54ABTE16245 is characterized for operation over the full military temperature range of –55°C to 125°C.
The SN74ABTE16245 is characterized for operation from –40°C to 85°C.
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.
Widebus and EPIC-ΙΙB are trademarks of Texas Instruments Incorporated.
PRODUCTION DATA information is 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.
) input can be used to disable the device so that the buses
Copyright 1999, Texas Instruments Incorporated
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
1
SN54ABTE16245, SN74ABTE16245
OPERATION
16-BIT INCIDENT-WAVE SWITCHING BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS226G – JULY 1993 – REVISED JUNE 1999
FUNCTION TABLE
(each 8-bit section)
INPUTS
DIR
OE
L L A data to B bus
L H B data to A bus
H X Isolation
logic diagram (positive logic)
1DIR
OE
1B1
1
25
2
To Seven Other Channels
47
1A1
2DIR
2B1
24
3
To Seven Other Channels
46
2A1
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
Input voltage range, VI (except I/O ports) (see Note 1) –0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the high state or power-off state, VO –0.5 V to 5.5 V. . . . . . . . . . . . . .
Current into any output in the low state, I
Input clamp current, I
Output clamp current, I
Package thermal impedance, θ
Storage temperature range, T
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51.
–0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CC
(V
< 0) –18 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IK
I
(V
OK
< 0) –50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
O
JA
O
(see Note 2): DGG package 89°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DL package 94°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
stg
128 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
UNIT
VIHHigh-level input voltage
V
VILLow-level input voltage
V
IOHHigh-level output current
mA
IOLLow-level output current
mA
SN54ABTE16245, SN74ABTE16245
16-BIT INCIDENT-WAVE SWITCHING BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS226G – JULY 1993 – REVISED JUNE 1999
recommended operating conditions (see Note 3)
SN54ABTE16245 SN74ABTE16245
MIN NOM MAX MIN NOM MAX
V
V
∆t/∆v Input transition rise or fall rate Outputs enabled 10 10 ns/V
T
NOTE 3: All unused control inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Supply voltage 4.5 5 5.5 4.5 5 5.5 V
CC
p
p
Input voltage 0 V
I
p
p
Operating free-air temperature –55 125 –40 85 °C
A
Implications of Slow or Floating CMOS Inputs
OE 2 2
Except OE 1.6 1.6
OE 0.8 0.8
Except OE 1.4 1.4
CC
B bus –12 –12
A bus –24 –60
B bus 12 12
A bus 64 90
, literature number SCBA004.
0 V
CC
V
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