TI SN75LBC777DW

SN75LBC777
SINGLE CHIP GEOPORT/AppleTalk TRANSCEIVER
SLLS227 – SEPTEMBER 1996
D
D
D
D
D
D
D
D
Single-Chip Interface Solution for the 9-Pin
GeoPort Peripheral Data CircuitTerminating Equipment (DCE) for the
Intelligent Network Port
Designed to Operate up to 4-Mbits/s Full
Duplex
Single 5-V Supply Operation
10-kV ESD Protection on Bus Terminals
Backward Compatible with AppleTalk and
LocalTalk LANs
Combines Multiple Components into a
Single Chip Solution
Complements the SN75LBC776 9-Terminal
GeoPort Host Data Terminal Equipment
(DTE) Interface Device
LinBiCMOS Process Technology
DW PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
DA1
VEE
C–
C+
SHDN
DZ2
DY2
GND
DEN
DA2
20
19
18
17
16
15
14
13
12
11
GND
VCC
DY1
DY3
DA3
RB2
RY2
RB1
RA1
RY1
logic diagram (positive logic)
description
The SN75LBC777 is a low-power LinBiCMOS
device that incorporate the drivers and receivers
for a 9-pin GeoPort peripheral interface. GeoPort
combines hybrid EIA/TIA-422-B and EIA/
TIA-423-B drivers and receivers to transmit data
up to four-Mbit/s full duplex. GeoPort is a serial
communications standard that is intended to
replace the RS-232, AppleTalk, and printer ports
all in one connector in addition to providing
real-time
data
transfer
capability.
The
SN75LBC777 provides point-to-point connections between GeoPort-compatible devices with
data transmission rates up to 4-Mbit/s full duplex
over a 4-foot cable. Applications include connection to telephone, integrated services digital
network (ISDN), digital sound and imaging,
fax-data modems, and other traditional serial and
parallel connections. The GeoPort is backwardly
compatible to both LocalTalk and AppleTalk LANs.
While the SN75LBC777 is powered off (VCC = 0)
the outputs are in a high-impedance state. When
the shutdown (SHDN) terminal is high, the charge
pump is powered down and the outputs are in a
high-impedance state. When high, the driver
enable (DEN) terminal puts the outputs of the
differential driver into a high-impedance state.
DA2
DEN
RY1
DA1
DA3
RY2
SHDN
VCC
GND
7
10
6
9
11
DZ2
12
RA1
13
RB1
1
18
16
17
14
DY2
15
DY1
DY3
RB2
5
19
8
Charge Pump
2
VEE
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.
GeoPort, LocalTalk, and AppleTalk are trademarks of Apple Computer, Incorporated.
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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
SN75LBC777
SINGLE CHIP GEOPORT/AppleTalk TRANSCEIVER
SLLS227 – SEPTEMBER 1996
description (continued)
A switched-capacitor voltage converter generates the negative voltage required from a single 5-V supply using
two 0.33-µF capacitors. One capacitor is between the C+ and C– terminals and the other is between VEE and
ground.
The SN75LBC777 is characterized for operation over the 0°C to 70°C temperature range.
DRIVER FUNCTION TABLE
INPUTS
ENABLE
OUTPUTS
DA1
DA2
DA3
SHDN
DEN
DY1
DY2
DZ2
DY3
H
X
H
L
X
L
X
X
H
L
X
L
L
X
H
X
X
L
X
H
X
L
L
X
H
L
X
X
L
X
L
L
X
L
H
X
OPEN
OPEN
OPEN
L
L
L
H
L
H
X
X
X
H
X
Z
Z
Z
Z
X
X
X
X
H
X
Z
Z
X
X
X
X
OPEN
OPEN
Z
Z
Z
Z
H = high level, L= low level, X = irrelevant, ? = indeterminate, Z = high impedance (off)
RECEIVER FUNCTION TABLE
INPUTS
RA1
ENABLE
OUTPUTS
RB1
RB2
SHDN
RY1
H
L
H
L
H
L
L
H
L
L
L
H
OPEN
SHORT†
L
H
H
L
?
?
X
H
Z
Z
OPEN
SHORT†
X
X
RY2
X
X
X
OPEN
Z
Z
† –0.2 V < VID < 0.2 V
H = high level, L= low level, X = irrelevant, ? = indeterminate,
Z = high impedance (off)
2
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
SN75LBC777
SINGLE CHIP GEOPORT/AppleTalk TRANSCEIVER
SLLS227 – SEPTEMBER 1996
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Positive supply voltage range, VCC, (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 to 7 V
Negative supply voltage range, VEE, (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 7 to 0.5 V
Receiver input voltage range (RA1, RB1, RB2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 15 V to 15 V
Receiver differential input voltage range, VID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 12 V to 12 V
Receiver output voltage range (RY1, RY2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 5.5 V
Driver output voltage range (Power Off)(DY1, DY2, DZ2, DY3) . . . . . . . . . . . . . . . . . . . . . . . . . . . – 15 V to 15 V
Driver output voltage range (Power On)(DY1, DY2, DZ2, DY3) . . . . . . . . . . . . . . . . . . . . . . . . . . . – 11 V to 11 V
Driver input voltage range (DA, SHDN, DEN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to VCC +0.4 V
Electrostatic discharge (see Note 2)
Bus Pins (Class 3 A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 kV
Bus Pins (Class 3 B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600 V
All Pins (Class 3, A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 kV
All Pins (Class 3 B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 V
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150 °C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
† 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 voltages values are with respect to the network ground terminal unless otherwise noted.
2. This rating is measured using MIL-STD-883C Method, 3015.7.
DISSIPATION RATING TABLE
PACKAGE
DW
TA ≤ 25°C
POWER RATING
1125 mW
POST OFFICE BOX 655303
DERATE FACTOR
ABOVE TA = 25°C
9.0°C
• DALLAS, TEXAS 75265
TA = 70°C
POWER RATING
720 mW
3
SN75LBC777
SINGLE CHIP GEOPORT/AppleTalk TRANSCEIVER
SLLS227 – SEPTEMBER 1996
recommended operating conditions
Supply voltage, VCC
High-level input voltage, VIH
(DA, SHDN, DEN)
Low-level input voltage, VIL
(DA, SHDN, DEN)
MIN
NOM
MAX
UNIT
4.75
5
5.25
V
5.25
V
0.8
V
V
2
Receiver common-mode input voltage, VIC
–7
7
Receiver differential input voltage, VID
–12
12
Voltage converter filter capacitance
0.33
Voltage converter filter capacitor equivalent series resistance (ESR)
V
µF
0
Operating free-air temperature, TA
0.2
Ω
70
°C
driver electrical characteristics over operating free-air temperature range (unless otherwise
noted)
PARAMETER
VOH
TEST CONDITIONS
High level output voltage
High-level
Single
g ended,,
See Figure 1
VOL
Low level output voltage
Low-level
|VOD|
Magnitude of differential output voltage
|VDY – VDZ|
∆|VOD|
Change in differential voltage magnitude
VOC
Common-mode output voltage
|∆VOC(SS)|
Magnitude of change, common-mode steadystate output voltage
|∆VOC(PP)|
Magnitude of change, common-mode
peak-to-peak output voltage
ICC
Supply current
IOZ
High-impedance output current
IOS
Short-circuit output current
MIN
TYP
RL= 12 kΩ
3.6
4.5
RL= 120 Ω
2
3.6
UNIT
V
V
RL= 12 kΩ
– 4.5
–3.6
V
RL = 120 Ω
– 2.7
– 1.8
V
RL = 120 Ω,,
See Figure
g
2
4
V
250
–1
3
200
See Figure 3
700
SHDN = DEN = 0 V,
No Load
SHDN = DEN = 5 V,
No Load
VCC = 0 or 5 V,
VCC = 5.25 V,
See Note 3
–10 ≤ VO ≤ 10 V
– 5 V ≤ VO ≤ 5 V,
NOTE 3: Not more than one output should be shorted at one time.
4
MAX
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
7
±170
mV
V
mV
mV
15
mA
100
µA
±100
µA
±450
mA
SN75LBC777
SINGLE CHIP GEOPORT/AppleTalk TRANSCEIVER
SLLS227 – SEPTEMBER 1996
driver switching characteristics over recommended operating conditions (unless otherwise
noted)
PARAMETER
TEST CONDITIONS
tPHL
tPLH
Propagation delay time, high-to-low level output
tPZL
tPZH
Driver output enable time to low-level output
SHDN
Driver output enable time to high-level output
SHDN
tPLZ
tPHZ
Driver output disable time from low-level output
SHDN
Driver output disable time from high-level output
SHDN
tr
tf
Rise time
Fall time
tPHL
tPLH
Propagation delay time, high-to-low level output
Propagation delay time, low-to-high level output
tPZL
Driver output enable time to low-level
low level output
tPZH
Driver output enable time to high-level
high level output
tPLZ
MIN
Propagation delay time, low-to-high level output
Driver output disable time from low-level
low level output
TYP
MAX
40
75
UNIT
ns
40
75
ns
25
100
µs
25
100
µs
30
100
ns
30
100
ns
10
25
75
ns
10
25
75
ns
40
75
ns
40
75
ns
SHDN
25
100
µs
DEN
35
100
ns
25
100
µs
35
150
ns
30
100
ns
DEN
30
100
ns
SHDN
35
100
ns
DEN
35
100
ns
Single-ended,
RL = 120 Ω
Ω,
See Figure 4
SHDN
Differential,
RL = 120 Ω
Ω,
See Figure 5
DEN
SHDN
tPHZ
Driver output disable time from high-level
high level output
tr
tf
Rise time
10
25
75
ns
Fall time
10
25
75
ns
tSK(P)
Pulse skew, |tPLH – tPHL|
22
ns
receiver electrical characteristics over free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
VIT+
VIT–
Positive-going input threshold voltage
Vhys
VOH
Differential input voltage hysteresis (VIT+ – VIT–)
VOL
Low-level output voltage
Negative-going input threshold voltage
High-level output voltage (see Note 4)
MIN
TYP
MAX
UNIT
200
mV
–200
mV
50
IOH = 2 mA,
IOL = –2 mA,
IOS
Short circuit output current
Short-circuit
VO = 0
VO = 5.25 V
RI
Input resistance
VCC = 0 or 5.25 V,
VIC = 0
VIC = 0
2
4.9
0.2
–85
6
V
0.8
– 45
45
–12 V ≤ VI ≤ 12 V
mV
30
V
mA
85
mA
kΩ
NOTE 4: If the inputs are left unconnected, RA1 interprets this as a high-level input and RB1 and RB2 interpret this as a low-level input so that
all outputs are at the high level.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
5
SN75LBC777
SINGLE CHIP GEOPORT/AppleTalk TRANSCEIVER
SLLS227 – SEPTEMBER 1996
receiver switching characteristics over free-air temperature range (unless otherwise noted)
TYP
MAX
tPHL
tPLH
Propagation delay time, high-to-low level output
PARAMETER
30
75
ns
Propagation delay time, low-to-high level output
30
75
ns
tr
tf
Rise time
15
30
ns
15
30
ns
tsk(p)
tPZL
Pulse skew |tPLH-tPHL|
20
ns
35
100
ns
tPZH
tPLZ
Receiver output enable time to high-level output
35
100
ns
21
100
ns
tPHZ
Receiver output disable time from high-level output
21
100
ns
tPZL
tPZH
Receiver output enable time to low-level output
12
25
µs
12
25
µs
tPLZ
tPHZ
Receiver output disable time from low-level output
25
100
ns
125
400
ns
6
TEST CONDITIONS
RL = 2 kΩ,
kΩ
See Figure 6
CL = 15 pF,
F
Fall time
Receiver output enable time to low-level output
Receiver output disable time from low-level output
Receiver output enable time to high-level output
Differential,
See Figure 7
Single-ended,
g
,
See Figure 7
Receiver output disable time from high-level output
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
CL = 50 pF,
CL = 50 pF,,
MIN
UNIT
SN75LBC777
SINGLE CHIP GEOPORT/AppleTalk TRANSCEIVER
SLLS227 – SEPTEMBER 1996
PARAMETER MEASUREMENT INFORMATION
CL
IO
CL
II
IO
DY1
VO
CL
DA2
RL
VI
DY2
II
DA1
RL
VO
VI
IO
DZ2
SHDN
RL
VO
DEN or
SHDN
TEST CIRCUIT
NOTES: A. CL = 50 pF
B. Driver 3 is a noninverting version of driver 1.
Figure 1. Single-Ended Driver DC Parameter Test Circuits
60 Ω
DY2
II
IO
VOD
DA2
VI
60 Ω
DZ2
50 pF
DEN or
SHDN
TEST CIRCUIT
Figure 2. Differential Driver DC Parameter Test Circuit
60 Ω
DY2
VOD
DA2
VI
DZ2
60 Ω
VOC
15 pF
DEN or
SHDN
TEST CIRCUIT (see Note A)
3V
VI
1.5 V
1.5 V
0V
VOC
0V
V
VOC(PP) OC(SS)
VOLTAGE WAVEFORM
NOTE A. Measured 3dB Bandwidth = 300 MHz
Figure 3. Differential Driver Common-Mode Output Voltage Test Circuit and Waveform
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
7
SN75LBC777
SINGLE CHIP GEOPORT/AppleTalk TRANSCEIVER
SLLS227 – SEPTEMBER 1996
PARAMETER MEASUREMENT INFORMATION
CL
IO
CL
II
DY1
DA1
RL
DY2
VO
CL
DA2
RL
VO
VI
SHDN
IO
DZ2
RL
VO
SHDN
or
DEN
TEST CIRCUIT
(see Note A)
3V
SHDN
or
DEN
1.5 V
1.5 V
1.5 V
1.5 V
0V
3V
1.5 V
DA
1.5 V
0V
tPLH
tPHL
tPLZ
tPZL
90%
DY1, DZ2
tPHZ
90%
10%
90%
50%
10%
10%
90%
0V
50%
10%
VOL
tPZH
tf
tPLZ
tr
tPHL
tPHZ
tPLH
VOH
tPZH
DY2
90%
90%
tPZL
90%
50%
10%
10%
VOH
90%
50%
10%
0V
10%
tf
tr
VOLTAGE WAVEFORM
(see Note B)
NOTES: A. CL = 50 pF, RL = 120 Ω
B. The input waveform tr, tf ≤ 10 ns.
C. Driver 3 is a noninverting version of driver 1.
Figure 4. Single-Ended Driver Propagation and Transition Times Test Circuits and Waveform
8
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
VOL
SN75LBC777
SINGLE CHIP GEOPORT/AppleTalk TRANSCEIVER
SLLS227 – SEPTEMBER 1996
PARAMETER MEASUREMENT INFORMATION
RL = 60 Ω
DY2
VOD
DA2
VI
RL = 60 Ω
DZ2
50 pF
SHDN
or
DEN
TEST CIRCUIT
3V
SHDN
or
DEN
1.5 V
1.5 V
1.5 V
1.5 V
0V
3V
1.5 V
DA
1.5 V
0V
tPHL
tPLH
tPHZ
tPZH
90%
90%
VOD(H)
90%
10%
50%
90%
VOD
tPLZ
50%
10%
0V
10%
10%
tPZL
VOD(L)
tf
tr
VOLTAGE WAVEFORM
NOTE A: For the input waveform tr, tf < = 10 ns
Figure 5. Differential Driver Propagation and Transition Times Test Circuit and Waveforms
VCC
II
Input
VI
2.5 V
VI
2 kΩ
RA +
RB _
RY
0V
– 2.5 V
IO
15 pF
0V
tPLH
Output
VO
SHDN
VO
tPHL
90%
10%
tr
TEST CIRCUIT
90%
VOH
1.5 V
10% V
OL
tf
VOLTAGE WAVEFORM
NOTE A: For the input waveform tr, tf < = 10 ns
Figure 6. Receiver Propagation and Transition Times Test Circuit and Waveform
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
9
SN75LBC777
SINGLE CHIP GEOPORT/AppleTalk TRANSCEIVER
SLLS227 – SEPTEMBER 1996
PARAMETER MEASUREMENT INFORMATION
VCC
RA +
RB _
– 2.5 V or 2.5 V
RY
RL = 500 Ω
S1
CL = 50 pF
SHDN
TEST CIRCUIT
3V
SHDN
1.5 V
1.5 V
0V
tPLZ
tPZL
VCC
S1 at VCC
90%
10%
VO
tPHZ
VOL
tPZH
VOH
90%
S1 at GND
10%
0V
VOLTAGE WAVEFORM
NOTE A: For the input waveform tr, tf < = 10 ns
Figure 7. Receiver Enable and Disable Test Circuit and Waveforms
10
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
SN75LBC777
SINGLE CHIP GEOPORT/AppleTalk TRANSCEIVER
SLLS227 – SEPTEMBER 1996
APPLICATION INFORMATION
GeoPort
Host
SN75LBC776
9-Terminal
DTE
13
RxD–
6
12
RxD +
7
7
6
TxD +
12
13
18
15
RESET/ATT
SCLK
TxD –
GND
15
18
19
17
Power
16 TxHS/Wake-Up
VCC
0.33 µF
Standard
19 Peripheral
SN75LBC777
9-Terminal
DCE
4
+
3
GeoPort
Peripheral
Device
SN75LBC777
9-Terminal
DCE
RESET/ATT
10
11
TxD
5
SHDN
14
1
SCLK
16
TxHS/WAKE-UP
9
DEN
6
RxD –
7
RxD +
RxD
GeoPort
Control
Logic
DTR
RTXC
CTS
RTS
17 TxHS/WAKE-UP
12
TxD +
13
TxD –
6
3
–5 V
0.33 µF
VEE
2
+
8
20
GND
15
RESET/ATT
18
SCLK
7
VCC
8
4
9
1
2
5
Power
NOTE A: A potential charge pump capacitor is the AVX 0805YC334MATXA or an equivalent.
Figure 8. GeoPort 9-terminal DCE Connection Application
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
11
SN75LBC777
SINGLE CHIP GEOPORT/AppleTalk TRANSCEIVER
SLLS227 – SEPTEMBER 1996
generator characteristics
PARAMETER
TEST CONDITIONS
232/V.28
MIN
Output voltage magnitude
IOS
RO(OFF)
Short-circuit output current
IO(OFF)
SR
3 kΩ ≤ RL ≤ 7 kΩ
RL = 450 Ω
MAX
25
4
6
5
Power-off source resistance
|VO| < 2 V
Power-off output current
VCC = 0,
|VO| < 6 V
0.04
10% to 90%
V
V
V
60
mA
Ω
300
±100
30
VO(RING) Output voltage ringing
† ui is the unit interval and is the inverse of the signaling rate (a.k.a. bit time).
13.2
3.7
NA
NA
UNIT
NA
NA
±3 V to ±3 V
MAX
150
300
Output voltage slew rate
Output transition time
NA
MIN
3.6
100
±3.3 V to ±3.3 V
tt
15
NA
VO = 0
VCC = 0,
562
MIN
Open circuit
|VO|
423/V.10
MAX
µA
NA
NA
4
30
V/µs
NA
0.22
2.1
µs
ui†
ui†
NA
NA
NA
0.3
NA
10%
NA
5%
receiver characteristics
PARAMETER
|VI|
VIT
RI
12
TEST CONDITIONS
232/V.28
MIN
MAX
Input voltage
Input voltage threshold
Input resistance
423/V.10
MIN
25
|VI| < 15 V
|VI| < 10 V
3 V < |VI| < 15 V
|VI| < 10 V
POST OFFICE BOX 655303
–3
3
NA
3
NA
• DALLAS, TEXAS 75265
MAX
MIN
10
NA
–0.2
7
562
NA
4
–3
0.2
MAX
25
V
3
V
7
kΩ
NA
3
NA
UNIT
V
kΩ
SN75LBC777
SINGLE CHIP GEOPORT/AppleTalk TRANSCEIVER
SLLS227 – SEPTEMBER 1996
MECHANICAL INFORMATION
DW (R-PDSO-G**)
PLASTIC SMALL-OUTLINE PACKAGE
16 PIN SHOWN
PINS **
0.050 (1,27)
16
20
24
28
A MAX
0.410
(10,41)
0.510
(12,95)
0.610
(15,49)
0.710
(18,03)
A MIN
0.400
(10,16)
0.500
(12,70)
0.600
(15,24)
0.700
(17,78)
DIM
0.020 (0,51)
0.014 (0,35)
16
0.010 (0,25) M
9
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°
A
0.050 (1,27)
0.016 (0,40)
Seating Plane
0.104 (2,65) MAX
0.012 (0,30)
0.004 (0,10)
0.004 (0,10)
4040000 / B 03/95
NOTES: A.
B.
C.
D.
All linear dimensions are in inches (millimeters).
This drawing is subject to change without notice.
Body dimensions do not include mold flash or protrusion not to exceed 0.006 (0,15).
Falls within JEDEC MS-013
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
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