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
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
3
SN54ABTE16245, SN74ABTE16245
PARAMETER
TEST CONDITIONS
UNIT
V
V
V
V
V
4.5 V
B port
V
V
V
V
A port
V
V
V
4.5 V
()
I
A
I
V
V
V
mA
V
CC
I
A or B ports
CC
,
16-BIT INCIDENT-WAVE SWITCHING BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS226G – JULY 1993 – REVISED JUNE 1999
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN54ABTE16245 SN74ABTE16245
V
IK
B port
OH
A port
p
OL
p
I
I(hold)
I
I
OZH
I
OZL
O
I
off
I
CC
CCD
C
i
C
io
†
All typical values are at VCC = 5 V, TA = 25°C.
‡
The parameters I
B port
Control inputs VCC = 5.5 V, VI = VCC or GND ±1 ±1
A or B ports VCC = 5.5 V, VI = VCC or GND ±20 ±20
‡
A port VCC = 5.5 V, VO = 2.7 V 10 10 µA
‡
A port VCC = 5.5 V, VO = 0.5 V –10 –10 µA
A port
B port
A or B ports
p
Control inputs VI = 2.5 V or 0.5 V 10 2.5 4 pF
I/O ports VO = 2.5 V or 0.5 V 13 4.5 8 pF
OZH
VCC = 4.5 V, II = –18 mA –1.2 –1.2 V
VCC = 5.5 V, IOH = –100 µA VCC–0.2 VCC–0.2
= 4.5
CC
VCC = 5.5 V, IOH = –1 mA 4.5 4.5
=
CC
= 4.5
CC
= 4.5
CC
=
CC
VCC = 5.5 V, VI = 0 to 5.5 V ±500 ±500
= 5.5 V,
CC
VCC = 0, VI or VO ≤ 4.5 V, VCCBIAS = 0 ±100 ±100 µA
=
= 5.5 V,
IO = 0,
VI = VCC or GND
V
= 5 V,
CL = 50 pF
and I
include the input leakage current.
OZL
MIN TYP
IOH = –1 mA 2.4 2.4
IOH = –12 mA 2 2
IOH = –32 mA 2.4 2.4
IOH = –64 mA 2
IOL = 1 mA 0.4 0.4
IOL = 12 mA 0.8
IOL = 64 mA 0.55 0.55
IOL = 90 mA 0.9
VI = 0.8 V 100 100
VI = 2 V –100 –100
= 2.5
O
Outputs high 28 36 28 36
Outputs low 38 48 38 48
Outputs disabled 20 32 20 32
OE high 0.02 0.02
OE low 0.33 0.33
–50 –120 –180 –50 –180
–25 –52 –90 –25 –90
†
MAX MIN TYP
†
MAX
µA
µ
mA
mA/
MHz
4
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PARAMETER
TEST CONDITIONS
UNIT
I
(VCCBIAS)
A
VOA port
V
0
V
IOA port
V
0
A
(INPUT)
(OUTPUT)
A
B
ns
B
A
ns
OE
A
ns
OE
B
ns
OE
A
ns
OE
B
ns
SN54ABTE16245, SN74ABTE16245
16-BIT INCIDENT-WAVE SWITCHING BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS226G – JULY 1993 – REVISED JUNE 1999
live-insertion specifications over recommended operating free-air temperature range
SN54ABTE16245 SN74ABTE16245
MIN TYP†MAX MIN TYP†MAX
VCC = 0 to 4.5 V, VCCBIAS = 4.5 V to 5.5 V,
I
= 0
CC
p
p
†
All typical values are at VCC = 5 V, TA = 25°C.
‡
VCC – 0.5 V < VCCBIAS
O(DC)
VCC = 4.5 V to 5.5 V‡, VCCBIAS = 4.5 V to 5.5 V,
I
= 0
O(DC)
CC
CC
=
=
VCCBIAS = 4.5 V to 5.5 V 1.1 1.5 1.9 1.1 1.5 1.9
VCCBIAS = 4.75 V to 5.25 V 1.3 1.5 1.7 1.3 1.5 1.7
VO = 0, VCCBIAS = 4.5 V –20 –100 –20 –100
VO = 3 V, VCCBIAS = 4.5 V 20 100 20 100
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, C
PARAMETER
t
PLH
t
PHL
t
PLH
t
PHL
t
PZH
t
PZL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
PHZ
t
PLZ
= 50 pF (unless otherwise noted) (see Figure 2)
L
FROM
TO
VCC = 5 V,
TA = 25°C
MIN TYP MAX MIN MAX MIN MAX
1.5 3.3 4.2 1.5 5.4 1.5 5.2
1.5 3.8 4.6 1.5 5.4 1.5 5.2
1.5 3 3.8 1.5 4.7 1.5 4.5
1.5 3.1 4 1.5 4.7 1.5 4.5
2 3.9 5.3 2 6.4 2 6.2
2 4.4 5.9 2 7 2 6.8
2 4.5 6 2 7.3 2 7.1
2 5 6.4 2 7.5 2 7.3
2 4.9 5.9 2 7 2 6.7
2 3.7 4.6 2 5.4 2 5.1
2 5.2 6.2 2 7.2 2 7
2 4 5 2 5.8 2 5.5
250 700 250 700
20 20
SN54ABTE16245 SN74ABTE16245
µ
µ
UNIT
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
5
SN54ABTE16245, SN74ABTE16245
(INPUT)
(OUTPUT)
BAR
Ω
ns
BAR
Ω
ns
BAR
Ω
ns
)
sk( )
)
sk(o)
PARAMETER
TEST CONDITIONS
LOAD
UNIT
t
CC
,
ns
16-BIT INCIDENT-WAVE SWITCHING BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS226G – JULY 1993 – REVISED JUNE 1999
extended switching characteristics over recommended ranges of supply voltage and operating
free-air temperature, C
PARAMETER
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
sk(p
t
sk(o
†
t
t
‡
t
t
†
tt is measured between 1 V and 2 V of the output waveform.
‡
tt is measured between 10% and 90% of the output waveform.
FROM
B A RX = Open 0.1 0.6 2 2
A B 0.4 0.8 2 2
B A RX = 26 Ω 0.3 0.8 2 2
B A RX = Open 0.3 0.7 1.3 1.3
A B 0.7 1.1 1.3 1.3
B A RX = 26 Ω 0.5 1 1.3 1.3
B A RX = 26 Ω 0.5 0.8 1.5 0.5 1.5 0.5 1.5 ns
A B
= 50 pF (unless otherwise noted) (see Figure 2)
L
TO
LOAD
= 13
X
= 26
X
= 56
X
Rise or fall
time
10%–90%
VCC = 5 V,
TA = 25°C
MIN TYP MAX MIN MAX MIN MAX
1.5 3.2 4 1.5 5 1.5 4.8
1.5 3.8 4.7 1.5 5.8 1.5 5.6
1.5 3.1 4 1.5 4.8 1.5 4.6
1.5 3.5 4.4 1.5 5.2 1.5 4.9
1.5 3 3.8 1.5 4.7 1.5 4.5
1.5 3.3 4.2 1.5 5.1 1.5 4.7
3.5 5.5 7.3 3.5 8.1 3.5 7.9 ns
SN54ABTE16245 SN74ABTE16245
UNIT
ns
ns
extended output characteristics over recommended ranges of supply voltage and operating
free-air temperature, C
FROM TO
(INPUT) (OUTPUT)
sk(temp)
t
sk(load)
A B
B A
B B
= 50 pF (see Figures 1 and 2)
L
V
= constant,
∆TA = 20°C
VCC = constant,
Temperature = constant
SN54ABTE16245 SN74ABTE16245
MIN MAX MIN MAX
3 2.5
RX = 56 Ω 4.5 4
RX = 13, 26,
or 56 Ω
4.5 4 ns
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54ABTE16245, SN74ABTE16245
16-BIT INCIDENT-WAVE SWITCHING BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS226G – JULY 1993 – REVISED JUNE 1999
PARAMETER MEASUREMENT INFORMATION
Device 1
A
Y1
B
Device
1 – Y1
t
PLH1
Device
1 – Yn
t
PLH2
Device
n – Yn
NOTES: A. Pulse skew, t
operating conditions.
B. Output skew, t
direction (e.g., |t
C. Temperature skew, t
temperature differences of 20°C.
D. Load skew, t
A
t
PHL1
, is defined as the difference in propagation delay times t
sk(p)
, is defined as the difference in propagation delay of any two outputs of the same device switching in the same
sk(o)
– t
PLH1
sk(temp)
, is measured with RX in Figure 2 at 13 W for one unit and 56 W for the other unit.
sk(load)
|).
PLH2
, is the output skew of two devices, both having the same value of VCC ± 1% and with package
In
Device n
B
PLH1
and t
on the same terminal at identical
PHL1
Y2
Yn
t
sk(load)
t
sk(temp)
Y1
Y2
Yn
t
Figure 1. Voltage Waveforms for Extended Characteristics
sk(o)
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
7
SN54ABTE16245, SN74ABTE16245
16-BIT INCIDENT-WAVE SWITCHING BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS226G – JULY 1993 – REVISED JUNE 1999
PARAMETER MEASUREMENT INFORMATION
From Output
Under Test
CL = 50 pF
(see Note A)
†
RX = 13, 26, or 56 Ω
Input
t
PLH
Output
500 Ω
500 Ω
7 V
Open
†
R
X
S2
S1
LOAD CIRCUIT FOR OUTPUTS
1.5 V 1.5 V
1.5 V 1.5 V
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
3.65 V
t
PHL
94 Ω
2 nF
3 V
0 V
V
V
OH
OL
t
Output
Control
(low-level
enabling)
Output
Waveform 1
S2 at 7 V
(see Note B)
Output
Waveform 2
S2 at Open
(see Note B)
SWITCHING TABLE
LOADS
PLH/tPHL
t
PLH/tPHL/tsk
t
PLH/tPHL/tsk
tt (A port) (see Note E)
tt (B port) (see Note F)
(A and B port)
t
PLZ/tPZL
t
PHZ/tPZH
EXTENDED
SWITCHING TABLE
LOADS
(A port)
(B port)
1.5 V 1.5 V
t
PZL
1.5 V
t
PZH
1.5 V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
S1 S2
Up
Up
Up
S1
Down
Up
Down
Up
VOL + 0.3 V
t
VOH – 0.3 V
Open
Open
Open
Open
t
PLZ
PHZ
7 V
S2
X
X
3 V
0 V
3.5 V
V
OL
V
OH
≈ 0 V
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf≤ 2.5 ns.
D. The outputs are measured one at a time with one transition per measurement.
E. tt is measured between 1 V and 2 V of the output waveform.
F. tt is measured between 10% and 90% of the output waveform.Figure 1
Figure 2. Load Circuit and Voltage Waveforms
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
IMPORTANT NOTICE
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any product or service without notice, and advise customers to obtain the latest version of relevant information
to verify, before placing orders, that information being relied on is current and complete. All products are sold
subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those
pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty . Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF
DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR
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CRITICAL APPLICA TIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERST OOD TO
BE FULLY AT THE CUSTOMER’S RISK.
In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent
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party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright 1999, Texas Instruments Incorporated
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