SN75LBC775DW [TI]
SINGLE-CHIP APPLETALKE AND LOCALTALKE TRANSCEIVER; 单芯片APPLETALKE和LOCALTALKE收发器
| 型号： | SN75LBC775DW |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | SINGLE-CHIP APPLETALKE AND LOCALTALKE TRANSCEIVER |
| 文件： | 总11页 (文件大小：156K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN75LBC775
SINGLE-CHIP APPLETALK AND LOCALTALK TRANSCEIVER
SLLS216A – MAY 1995 – REVISED JANUARY 1996
DW PACKAGE
(TOP VIEW)
Single-Chip Interface Solution for
AppleTalk and LocalTalk
Designed to Operate Up To 1 Mbps In
AppleTalk and LocalTalk
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
HSKA
GND
V
V
SS
CC
C–
C+
DEN
DY
DZ
HSKY
RY2
RA2
RB2
RB1
RA1
RY1
REN
Switched-Capacitor Voltage Converter
Allows for Single 5-V Operation
4-kV ESD Protection on Bus Terminals
Combines Multiple Components into a
Single Chip Solution
GND
V
LinBiCMOS Process Technology
CC
DA
description
The SN75LBC775 is a low-power LinBiCMOS
device that incorporates the drivers and receivers
for an AppleTalk or a LocalTalk interface and a
switched-capacitor voltage converter for a single
5-V supply operation. LocalTalk uses a hybrid of
RS-422 with the transceiver connected to the
network through a small isolation transformer.
The AppleTalk mode provides point-to-point
communications and uses the same differential
driver and receiver as LocalTalk with the addition
of a hybrid RS-423, single-ended handshake
driver (HSK) and receiver. In the AppleTalk mode,
the port connects directly to the receiver with no
isolation transformer.
functional diagram
1
18
HSKY
HSKA
6
7
DY
DZ
10
DA
5
DEN
13
14
RA1
RB1
12
RY1
While the device power is turned off (V
= 0) or
CC
disabled in the LocalTalk mode, the outputs are in
a high-impedance state. When the driver enable
(DEN) terminal is high, both the differential and
serial driver outputs are in a high-impedance
state.
16
15
RA2
RB2
17
RY2
11
The receiver output can be disabled and becomes
a high impedance when the REN terminal is low.
REN
19
V
CC
V
SS
–5 V
2
Aswitched-capacitorvoltageconvertergenerates
the negative voltage required from a single 5-V
supply using two 22-µF capacitors. One capacitor
is between the C+ and C– terminals and the
Charge Pump
8
GND
second is between V and ground.
SS
The SN75LBC775 is characterized for operating
over the temperature range of 0°C to 70°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.
LocalTalk and AppleTalk are trademarks of Apple Computer, Inc.
LinBiCMOS is a trademark of Texas Instruments Incorporated.
Copyright 1996, 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.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
SN75LBC775
SINGLE-CHIP APPLETALK AND LOCALTALK TRANSCEIVER
SLLS216A – MAY 1995 – REVISED JANUARY 1996
DRIVER FUNCTION TABLE
RECEIVER FUNCTION TABLE
INPUT
HSKA
ENABLE
OUTPUT
INPUT
ENABLE
OUTPUT
DA
DEN
A
H
L
B
L
HSKY
RA
RB
L
REN
H
RY
H
L
H
X
L
L
L
L
L
X
X
L
H
L
L
X
X
H
H
X
X
L
H
H
X
X
H
OPEN
H
H
?
†
X
L
H
L
SHORT
X
H
OPEN
OPEN
L
Z
Z
†
X
X
X
X
H
Z
Z
Z
Z
–0.2 V < V < 0.2 V
ID
OPEN
Z
H = high level,
L = low level,
X = irrelevant,
? = indeterminate,
Z = high impedance (off)
schematics of inputs and outputs
ALL LOGIC INPUTS
RECEIVER INPUTS
V
CC
V
CC
A Input
5 kΩ
Only
24 kΩ
Input
Input
1 kΩ
B Input
Only
10 kΩ
HSKY OUTPUT
DY AND DZ OUTPUTS
RECEIVER OUTPUTS
V
CC
V
CC
V
CC
DZ
Output
DY
Output
4 kΩ
Output
Output
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
SN75LBC775
SINGLE-CHIP APPLETALK AND LOCALTALK TRANSCEIVER
SLLS216A – MAY 1995 – REVISED JANUARY 1996
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
Supply voltage range, V
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –7 to 0.5 V
CC
SS
Receiver input voltage range, V (RA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –15 V to 15 V
Receiver differential input voltage range, V
Receiver output voltage range, V (RY) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 5.5 V
Driver output voltage range, V
I
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –12 V to 12 V
ID
O
(Power Off) (DY, DZ, HSKY) . . . . . . . . . . . . . . . . . . . . . . . . . –15 V to 15 V
(Power On) (DY, DZ, HSKY) . . . . . . . . . . . . . . . . . . . . . . . . –11 V to 11 V
O
Driver input voltage range, V (DA, HSKA, DEN, REN) . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to V
+ 0.4 V
I
CC
Electrostatic discharge (see Note 2)
Class 3, A: Bus terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 kV
All other terminals . . . . . . . . . . . . . . . . . . . . . . . . . . 2 kV
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
Operating free-air temperature range,T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
A
†
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. All voltage values are with respect to network ground terminal unless otherwise noted.
2. This maximum rating is tested according to MIL-STD-883C, Method 3015.7.
DISSIPATION RATING TABLE
T
≤ 25°C
DERATING FACTOR
T = 85°C
A
POWER RATING
A
PACKAGE
POWER RATING
ABOVE T = 25°C
A
DW
1125 mW
9.0 mW/°C
585 mW
recommended operating conditions
MIN NOM
4.75
MAX
UNIT
V
Supply voltage, V
5
5.25
CC
High-level input voltage, V
DA, HSKA, DEN, REN
DA, HSKA, DEN, REN
2
V
IH
Low-level input voltage, V
IL
Receiver input common-mode voltage range, V
0.8
7
V
‡
–7
–12
22
V
ICR
‡
Differential input voltage, V
ID
12
V
Voltage-converter filter capacitance
Voltage-converter filter-capacitor equivalent series resistance (ESR)
Operating free-air temperature, T
µF
2
Ω
°C
0
70
A
‡
The algebraic convention, in which the less-positive (more negative) limit is designated minimum, is used in this data sheet.
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
SN75LBC775
SINGLE-CHIP APPLETALK AND LOCALTALK TRANSCEIVER
SLLS216A – MAY 1995 – REVISED JANUARY 1996
DRIVER
electrical characteristics over recommend operating characteristics (unless otherwise noted)
†
PARAMETER
High-level output voltage
Low-level output voltage
TEST CONDITIONS
R = 3 kΩ, See Figure 1
L
MIN TYP
MAX
UNIT
V
V
V
3.7
OH
Single ended
–3.7
V
OL
|V
|
Magnitude of differential output voltage (V
Change in differential voltage magnitude
– V )
DZ
See Figure 2
See Figure 2
See Figure 3
See Figure 3
4.0
–1
5.6
10
V
OD
DY
∆|V
|
250
3
mV
V
OD
‡
Common-mode output voltage
V
OC
∆V
Change in steady-state common-mode output voltage
High-impedance output current
±200
±100
450
mV
µA
OC(SS)
I
V = 0, –10 V ≤ V ≤ 10 V
CC O
OZ
I
Short-circuit output current
–5 V ≤ V ≤ 5 V
mA
mA
OS
CC
IH
O
DEN at 0 V,
No load
REN at 5 V,
I
I
Supply current
5
10
High-level input current
V
I
= 5 V
200
µA
µA
µA
All terminals except REN
–100 –200
–300 –455
I
IL
low-level input current
REN
V = 0
I
†
‡
All typical values are at V
= 5 V and T = 25°C.
A
CC
The algebraic convention, in which the less positive (more negative) limit is designated minimum, is used in this data sheet.
switching characteristics over recommend operating conditions (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
155
115
140
115
100
100
100
100
135
90
MAX
300
180
300
180
250
250
250
250
300
180
300
180
50
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Single ended
Differential
t
t
Propagation delay time, high- to low-level
PHL
Single ended
Differential
Propagation delay time, low- to high-level
PLH
t
t
Propagation delay time, high-impedance to low-level output
Propagation delay time, high-impedance to high-level output
Propagation delay time, low-level to high-impedance output
Propagation delay time, high-level to high-impedance output
PZL
PZH
tPLZ
tPHZ
See Figures 1 and 2
Single ended
t
t
t
Rise time
r
Differential
Single ended
145
95
Fall time
f
Differential
Single ended
15
Pulse skew, |t
-t |
PLH PHL
sk(p)
Differential
2
22
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
SN75LBC775
SINGLE-CHIP APPLETALK AND LOCALTALK TRANSCEIVER
SLLS216A – MAY 1995 – REVISED JANUARY 1996
RECEIVER
electrical characteristics over recommended operating conditions (unless otherwise noted)
†
PARAMETER
TEST CONDITIONS
MIN TYP
MAX
UNIT
mV
mV
mV
V
V
IT+
V
IT–
V
hys
V
OH
V
OL
Positive-going differential input voltage threshold
Negative-going differential input voltage threshold
200
‡
–200
I
= 2 mA,
OH
See Figure 4
I
= –2mA,
OL
Input voltage hysteresis (V
High-level output voltage
Low-level output voltage
– V
30
IT+
IT–)
2
4.5
0.8
85
V
V
V
V
= 0
= V
8
–85
6
50
mA
mA
kΩ
O
‡
I
Short-circuit output current
Input resistance
OS
–50
–8
O
CC
r
i
= 0 or 5.25 V, –12 V ≤ V ≤ 12 V
I
CC
†
‡
All typical values are at V
= 5 V and T = 25°C.
A
CC
The algebraic convention, in which the less positive (more negative) limit is designated minimum, is used in this data sheet.
switching characteristics over recommended operating conditions (unless otherwise noted)
†
PARAMETER
Propagation delay time, high- to low-level output
Propagation delay time, low- to high-level output
Rise time
TEST CONDITIONS
MIN TYP
MAX
60
UNIT
ns
t
t
t
t
t
25
22
8
PHL
60
ns
PLH
R
= 2 kΩ,
C = 15 pF,
L
L
25
ns
r
See Figure 4
Fall time
7
25
ns
f
Pulse skew, |t
– t
|
3
20
ns
SK(P)
PLH PHL
t
t
t
t
Receiver output enable time to low-level output
Receiver output enable time to high-level output
Receiver output disable time to low-level output
Receiver output disable time to high-level output
50
50
50
50
ns
ns
ns
ns
PZL
PZH
PLZ
PHZ
C
= 80 pF,
See Figure 5
L
†
All typical values are at V
= 5 V and T = 25°C.
A
CC
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
SN75LBC775
SINGLE-CHIP APPLETALK AND LOCALTALK TRANSCEIVER
SLLS216A – MAY 1995 – REVISED JANUARY 1996
PARAMETER MEASUREMENT INFORMATION
776 pF
Inputs
3 V
1.5 V
0 V
I
I
I
51 Ω
3 kΩ
DA, HSKA
HSKY
HSKA
t
t
PLH
PHL
V
V
V
I
O
776 pF
3 kΩ
776 pF
3 kΩ
V
OH
Outputs
DY
90% 90%
0 V
V
10%
10%
51 Ω
51 Ω
DY
DZ
OL
I
t
f
t
r
V
V
O
DA
V
OH
0 V
90%
90%
I
DZ, HSKY
10%
10%
V
OL
O
t
f
t
r
DEN
TEST CIRCUIT
VOLTAGE WAVEFORM
(see Note A)
Figure 1. Driver Propagation and Transition Times for AppleTalk
220 pF
51 Ω
DY
V
OD
DA
220 pF
DEN
DZ
51 Ω
TEST CIRCUIT
3 V
DEN
DA
1.5 V
1.5 V
1.5 V
1.5 V
0 V
3 V
1.5 V
1.5 V
0 V
t
t
PZH
PHZ
t
t
PLZ
t
PHL
PLH
V
ODH
V
OD
V
ODL
t
t
r
t
f
PZL
VOLTAGE WAVEFORM
(see Note A)
NOTE A: The input waveform t , t < = 10 ns
r f
Figure 2. Driver Propagation and Transition Times for LocalTalk
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
SN75LBC775
SINGLE-CHIP APPLETALK AND LOCALTALK TRANSCEIVER
SLLS216A – MAY 1995 – REVISED JANUARY 1996
PARAMETER MEASUREMENT INFORMATION
DY
47 Ω
V
OD
DA
47 Ω
V
OC
DEN
DZ
TEST CIRCUIT
1.5 V
3 V
0 V
0 V
1.5 V
V
IN
V
OC
∆V
OC(SS)
VOLTAGE WAVEFORM
Figure 3. Differential Driver Common Mode Output Voltage Tests
V
CC
+2.5 V
–2.5 V
RB
V
I
0 V
0 V
2 kΩ
RA
RA
RB
I
O
+
_
V
I
t
t
PLH
PHL
V
OH
+1.5 V
90% 90%
V
O
V
O
15 pF
10%
10%
REN
V
OL
t
f
t
r
TEST CIRCUIT
VOLTAGE WAVEFORM
(see Note A)
NOTE A: The input waveform t , t < = 10 ns
r f
Figure 4. Receiver Propagation and Transition Times
V
CC
±2.5 V
or
–2.5 V
RA
RB
RY
R
= 500 Ω
+
_
L
S1
C
L
REN
TEST CIRCUIT
3 V
0 V
1.5 V
1.5 V
REN
t
t
t
PLZ
PZL
V
OH
0 V
V
O
S1 to V
CC
RA at – 2.5 V
V
OL
t
PHZ
PZH
V
OH
V
O
0 V
S1 at GND
RA at 2.5 V
V
OL
VOLTAGE WAVEFORM
Figure 5. Receiver Enable and Disable Test Circuit and Waveform
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
SN75LBC775
SINGLE-CHIP APPLETALK AND LOCALTALK TRANSCEIVER
SLLS216A – MAY 1995 – REVISED JANUARY 1996
TYPICAL CHARACTERISTICS
MAXIMUM DRIVER DATA RATE
vs
CAPACITIVE LOAD
3
2.5
2
1.5
1
0.5
V
= 0
O
No Load
0
0
100 200 300 400 500 600 700 800
C
– Capacitive Load – pF
L
Figure 6
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
SN75LBC775
SINGLE-CHIP APPLETALK AND LOCALTALK TRANSCEIVER
SLLS216A – MAY 1995 – REVISED JANUARY 1996
APPLICATION INFORMATION
V
CC
0.1 µF
SN75LBC775
HSKA
20
19
18
17
16
15
14
13
12
11
1
2
Single-Ended Driver Input
GND
22 pF
51 Ω
V
SS
V
CC
3
22 µF
To Single-Ended Receiver
C–
HSKY
+
22 µF
4
Receiver 2 Output
+Receiver 2 Input
–Receiver 2 Input
–Receiver 1 Input
+Receiver 1 Input
+
C+
RY2
5
DEN
RA2
RB2
RB1
RA1
To
Receiver
51 Ω
0.1 µF
0.1 µF
6
DY
7
DZ
8
51 Ω
GND
9
V
CC
RY1
Receiver 1 Output
10
DA
REN
0.1 µF
Differential Driver Input
APPLETALK
V
CC
0.1 µF
SN75LBC775
20
19
18
17
16
15
14
13
12
11
1
HSKA
GND
NC
2
3
V
V
CC
SS
22 µF
NC
C–
HSKY
Isolation
Transformer
+
22 µF
4
+
Receiver 2 Output
+Receiver 2 Input
–Receiver 2 Input
–Receiver 1 Input
+Receiver 1 Input
C+
RY2
5
DEN
RA2
RB2
RB1
RA1
51 Ω
51 Ω
To
LAN
220 pF
220 pF
6
DY
7
DZ
8
GND
9
V
CC
RY1
Receiver 1 Output
10
DA
REN
0.1 µF
Differential Driver Input
LOCALTALK
NC – No internal connection
RB
RA
–
+
RS-423 Input
RY
Receiver Output
Figure 7. Receiving RS-423 Signals With a Differential Receiver
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
SN75LBC775
SINGLE-CHIP APPLETALK AND LOCALTALK TRANSCEIVER
SLLS216A – MAY 1995 – REVISED JANUARY 1996
MECHANICAL INFORMATION
DW (R-PDSO-G**)
PLASTIC SMALL-OUTLINE PACKAGE
16 PIN SHOWN
PINS **
0.050 (1,27)
16
20
24
28
DIM
0.020 (0,51)
0.014 (0,35)
0.010 (0,25)
M
0.410
0.510
0.610
0.710
A MAX
(10,41) (12,95) (15,49) (18,03)
16
9
0.400
0.500
0.600
0.700
A MIN
(10,16) (12,70) (15,24) (17,78)
0.419 (10,65)
0.400 (10,15)
0.010 (0,25) NOM
0.299 (7,59)
0.293 (7,45)
Gage Plane
0.010 (0,25)
1
8
0°–8°
0.050 (1,27)
0.016 (0,40)
A
Seating Plane
0.004 (0,10)
0.012 (0,30)
0.004 (0,10)
0.104 (2,65) MAX
4040000/B 10/94
NOTES: B. All linear dimensions are in inches (millimeters).
C. This drawing is subject to change without notice.
D. Body dimensions do not include mold flash or protrusion, not to exceed 0.006 (0,15).
E. Falls within JEDEC MS-013
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
IMPORTANT NOTICE
Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue
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
WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER
CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD 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
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
intellectual property right of TI covering or relating to any combination, machine, or process in which such
semiconductor products or services might be or are used. TI’s publication of information regarding any third
party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright 1998, Texas Instruments Incorporated
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