TI SN75LBC978DL

SN75LBC978
9-CHANNEL DIFFERENTIAL TRANSCEIVER
SLLS134E – APRIL 1992 – REVISED MAY 1997
D
D
D
D
D
D
D
D
D
Nine Differential Channels for the Data and
Control Paths of the Differential Small
Computer Systems Interface (SCSI)
Meets or Exceeds the Requirements of
ANSI Standard RS-485 and ISO
8482:1987(E)
Packaged in Shrink Small-Outline Package
With 25-mil Terminal Pitch
Designed to Operate at 10 Million Transfers
Per Second
Low Disabled Supply Current
1.4 mA Typ
Thermal Shutdown Protection
Power-Up/Power-Down Glitch Protection
Positive and Negative Output-Current
Limiting
Open-Circuit Fail-Safe Receiver Design
DL PACKAGE
(TOP VIEW)
NC
WRAP2
WRAP1
1A
1DE/RE
2A
2DE/RE
3A
3DE/RE
4A
4DE/RE
VCC
GND
GND
GND
GND
GND
VCC
5A
5DE/RE
6A
6DE/RE
7A
7DE/RE
8A
8DE/RE
9A
9DE/RE
description
The SN75LBC978 is a nine-channel differential
transceiver based on the 75LBC176 LinASIC
cell. Use of TI’s LinBiCMOS† process technology allows the power reduction necessary to
integrate nine differential balanced transceivers†.
On-chip enabling logic makes this device
applicable for the data path (eight data bits plus
parity) and the control path (nine bits) for the Small
Computer Systems Interface (SCSI) standard.
The WRAP function allows in-circuit testing and
wired-OR channels for the BSY, RST, and SEL
signals of the SCSI bus.
1
56
2
55
3
54
4
53
5
52
6
51
7
50
8
49
9
48
10
47
11
46
12
45
13
44
14
43
15
42
16
41
17
40
18
39
19
38
20
37
21
36
22
35
23
34
24
33
25
32
26
31
27
30
28
29
NC
NC
CE
9B +
9B –
8B +
8B –
7B +
7B –
6B +
6B –
VCC
GND
GND
GND
GND
GND
VCC
5B +
5B –
4B +
4B –
3B +
3B –
2B +
2B –
1B +
1B –
Pins 13 through 17 and 40 through 44 are
connected together to the package lead
frame and signal ground.
The SN75LBC978 is packaged in a shrink
small-outline package (DL) with improved thermal
characteristics using heat-sink terminals. This
package is ideal for low-profile, space-restricted
applications such as hard disk drives.
The switching speed of the SN75LBC978 is sufficient to transfer data over the data bus at 10 million transfers
per second. Each of the nine identical channels conforms to the requirements of the ANSI RS-485 and
ISO 8482:1987(E) standards referenced by ANSI X3.131-1993 (SCSI-2) and the proposed SCSI-3 standards.
The SN75LBC978 is characterized for operation from 0°C to 70°C.
† Patent Pending
LinASIC and LinBiCMOS are trademarks of Texas Instruments Incorporated.
Copyright  1997, 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
SN75LBC978
9-CHANNEL DIFFERENTIAL TRANSCEIVER
SLLS134E – APRIL 1992 – REVISED MAY 1997
logic diagram (positive logic)
1A
WRAP1
1DE/RE
CE
2A
2DE/RE
3A
3DE/RE
4A
4DE/RE
5A
5DE/RE
6A
4
30
3
29
54
6
7
32
Channel 2
8
9
34
Channel 3
Channel 4
35
38
19
20
33
36
10
11
31
Channel 5
37
47
21
Channel 6
46
23
49
2
48
WRAP2
7DE/RE
8A
8DE/RE
9A
9DE/RE
2
1B –
5
6DE/RE 22
7A
1B+
2B+
2B –
3B+
3B –
4B+
4B –
5B+
5B –
6B+
6B –
7B+
7B –
24
51
25
26
50
Channel 9
53 9B+
52
9B –
27
28
8B+
Channel 8
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
8B –
SN75LBC978
9-CHANNEL DIFFERENTIAL TRANSCEIVER
SLLS134E – APRIL 1992 – REVISED MAY 1997
schematics of inputs and outputs
ALL INPUTS EXCEPT CE
INPUT CE
VCC
VCC
22 kΩ
300 Ω
300 Ω
Input
Input
50 kΩ
B+ AND B – I/O PORTS
RECEIVER OUTPUT
VCC
VCC
100 kΩ
B+ Only
3 kΩ
18 kΩ
Receiver
Driver
A Output
100 kΩ
B – Only
12 kΩ
1 kΩ
B+ or B –
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage range, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to 7 V
Bus voltage range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 10 V to 15 V
Data I/O and control (A-side) voltage range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to 7 V
Continuous power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . internally limited
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.
NOTE 1: All voltage values are dc and with respect to GND.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
3
SN75LBC978
9-CHANNEL DIFFERENTIAL TRANSCEIVER
SLLS134E – APRIL 1992 – REVISED MAY 1997
recommended operating conditions
Supply voltage, VCC
MIN
NOM
MAX
UNIT
4.75
5
5.25
V
12
mode) VO, VI, or VIC
Voltage at any bus terminal (separately or common
common-mode),
B + or B –
High-level input voltage, VIH
All except B + and B –
Low-level input voltage, VIL
All except B + and B –
–7
2
V
0.8
V
– 60
mA
A
–8
mA
B + or B –
60
mA
8
mA
70
°C
B + or B –
High level output current,
High-level
current IOH
Low level output current,
Low-level
current IOL
V
A
Operating free-air temperature, TA
0
device electrical characteristics over recommended ranges of operating conditions
PARAMETER
IIH
IIL
ICC
CO
Cpd
d
High level input current
High-level
Low level input current
Low-level
Supply current
TEST CONDITIONS
A, WRAP, DE/RE
CE
A, WRAP, DE/RE
All receivers enabled
No load,
CE at 5 V,
VID = 5 V,
WRAP and DE/RE at 0 V
All drivers enabled
No load,
WRAP at 0 V
CE and DE/RE at 5 V,
UNIT
µA
100
µA
µA
100
µA
1.4
3
mA
29
45
mA
7
10
mA
VIL = 0
0.8
8V
CE at 0 V
MAX
– 200
– 200
See Figure 1
All drivers and receivers
disabled
Power dissipation capacitance
TYP†
VIH = 2 V
CE
Bus port output capacitance
MIN
B + or B –
19
pF
One driver
460
pF
40
pF
One receiver
driver electrical characteristics over recommended ranges of operating conditions (unless
otherwise noted)
PARAMETER
| VOD |
Differential output voltage
IOS
IOZ
Output short-circuit current
4
TEST CONDITIONS
Vtest = – 7 V to 12 V,
See Figure 3
High-impedance-state output current
MIN
TYP
1
2
See Figure 2
See receiver input current
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
MAX
UNIT
V
± 250
mA
SN75LBC978
9-CHANNEL DIFFERENTIAL TRANSCEIVER
SLLS134E – APRIL 1992 – REVISED MAY 1997
receiver electrical characteristics over recommended ranges of operating conditions (unless
otherwise noted) (see Figure 3)
PARAMETER
TEST CONDITIONS
VOH
VOL
High-level output voltage
VIT+
VIT–
Differential-input high-level threshold voltage
Vhys
Receiver input hysteresis voltage ( VIT+ – VIT– )
II
IOZ
VID = 200 mV,
VID = – 200 mV,
Low-level output voltage
Differential-input low-level threshold voltage
Receiver input current
B+ and B –
High impedance state output current
High-impedance-state
IOH = – 8 mA
IOL = 8 mA
IOH = – 8 mA
IOL = 8 mA
MIN
TYP†
MAX
2.5
UNIT
V
0.8
V
0.2
V
– 0.2
V
45
mV
VI = 12 V,
Other input at 0 V
VCC = 5 V,
0.7
1
mA
VI = 12 V,
Other input at 0 V
VCC = 0 V,
0.8
1
mA
VI = – 7 V,
Other input at 0 V
VCC = 5 V,
– 0.5
– 0.8
mA
VI = – 7 V,
Other input at 0 V
VCC = 0 V,
– 0.4
– 0.8
mA
VO = GND
VO = VCC
– 200
50
µA
driver switching characteristics over recommended ranges of operating conditions (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
See Figure 4
td(OD)
(
)
tsk(lim)
k(li )
tsk(p)
tt
Differential delay time, high- to low-level output (td(ODH)) or lowto high-level output
out ut (td(ODL))
Skew limit,, the maximum difference in propagation
g
delay
y times
between any two drivers on any two devices
Pulse skew (|td(ODL) – td(ODH)|)
MIN
11.8
VCC = 5 V,
See Figure 4
TA = 25°C,
VCC = 5 V,
See Figure 4
TA = 70°C,
VCC = 5 V,
See Note 2
MAX
UNIT
26.4
14
18
22
18
22
26
15
8
0
See Figure 4
Transition time (tr or tf)
TYP†
6
10
ns
ns
ns
ns
receiver switching characteristics over recommended ranges of operating conditions (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
See Figure 5
tpd
Propagation delay time, high- to low-level output (tPHL) or low- to
high-level out
ut (tPLH)
output
tsk(lim)
k(li )
Skew limit,, the maximum difference in propagation
g
delay
y times
between any two drivers on any two devices
tsk(p)
Pulse skew ( |tPHL – tPLH| )
TYP†
19.5
VCC = 5 V,
See Figure 5
TA = 25°C,
VCC = 5 V,
See Figure 5
TA = 70°C,
VCC = 5 V,
See Note 2
MAX
tt
Transition time ( tr or tf )
† All typical values are at VCC = 5 V, TA = 25°C.
‡ Cpd determines the no-load dynamic current consumption; IS = Cpd ⋅ VCC ⋅ f + ICC.
NOTE 2: This specification applies to any 5°C band within the operating temperature range.
• DALLAS, TEXAS 75265
UNIT
30.7
20.2
24.7
29.2
21.1
25.6
30.1
12
See Figure 5
POST OFFICE BOX 655303
MIN
9
2
3
6
ns
ns
ns
ns
5
SN75LBC978
9-CHANNEL DIFFERENTIAL TRANSCEIVER
SLLS134E – APRIL 1992 – REVISED MAY 1997
transceiver switching characteristics over recommended ranges of operating conditions
PARAMETER
TEST CONDITIONS
ten(TXL)
ten(TXH)
Enable time, transmit-to-receive to low-level output
ten(RXL)
ten(RXH)
Enable time, receive-to-transmit to low-level output
tsu
Setup time, WRAP1 or WRAP2 before active input(s) or output(s)
MIN
Enable time, transmit-to-receive to high-level output
See Figure 6
Enable time, receive-to-transmit to high-level output
MAX
UNIT
80
ns
80
ns
150
ns
150
ns
150
ns
thermal characteristics
PARAMETER
TEST CONDITIONS
RθJA
Junction-to-free-air thermal resistance
RθJC
Junction-to-case thermal resistance
MIN
Board mounted, No air flow
TYP
12
°C/ W
Vtest
R1 = 165 Ω
B+
A
RL = 75 Ω
VOD
B–
CE and
DE/RE at 2 V,
WRAP1 and
WRAP2 at 0.8 V
R2 = 165 Ω
Vtest
Figure 1. Driver VOD Test Circuit
CE at 2 V,
DE/RE and WRAP1
or WRAP2 at 0.8 V
(see Note A)
– II,
– IIH,
or
– IIL
VI, VIC,
VIH,
or
VIL
VIT +,
VIT – ,
or
VID
B+
A
B–
VOH
or
VOL
NOTE A: For the IOZ measurement, CE is at 0.8 V.
Figure 2. Receiver Test Circuit and Input Conditions
6
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
UNIT
°C/ W
PARAMETER MEASUREMENT INFORMATION
0 V or 3 V
MAX
50
– IOH, – IOL,
or
– IOZ
SN75LBC978
9-CHANNEL DIFFERENTIAL TRANSCEIVER
SLLS134E – APRIL 1992 – REVISED MAY 1997
PARAMETER MEASUREMENT INFORMATION
B+
B–
A
– IIH
or
– IIL
VIH
or
VIL
VOD
– IOH, – IOL, – IOS,
or
– IOZ
VO,
VOH,
or
VOL
CE and
DE/RE at 2 V,
WRAP1 and
WRAP2 at 0.8 V
(see Note A)
NOTE A: For the IOZ test, the CE input is at 0.8 V.
Figure 3. Driver Test and Input Conditions
GND
R1 = 165 Ω
B+
A
Input
(see Note A)
RL = 75 Ω
Output
B–
R2 = 165 Ω
50 pF†
50 pF†
5V
CE and
DE/RE at VCC
TEST CIRCUIT
3V
1.5 V
0V
Input
td(ODH)
Output
td(ODL)
90%
90%
10%
tr
10%
0V
tf
VOLTAGE WAVEFORMS
† Includes probe and jig capacitance.
NOTE A: The input is provided by a pulse generator with an output of 0 to 3 V, PRR of 1 MHz, 50% duty cycle,
tr and tf < 6 ns, and ZO = 50 Ω.
Figure 4. Driver Propagation Delay Time Test Circuit and Waveforms
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
7
SN75LBC978
9-CHANNEL DIFFERENTIAL TRANSCEIVER
SLLS134E – APRIL 1992 – REVISED MAY 1997
PARAMETER MEASUREMENT INFORMATION
CE at VCC,
DE/RE, WRAP1 and
WRAP2 at GND
Input
(see Note A)
B+
1.5 V
B–
A
15 pF†
Output
TEST CIRCUIT
3V
1.5 V
0V
Input
tPLH
tPHL
90%
Output
90%
10%
tr
10%
VOH
1.4 V
VOL
tf
VOLTAGE WAVEFORMS
† Includes probe and jig capacitance.
NOTE A: The input is provided by a pulse generator with an output of 0 to 3 V, PRR
of 1 MHz, 50% duty cycle, tr and tf < 6 ns, and ZO = 50 Ω.
Figure 5. Receiver Propagation Delay Time Test Circuit and Waveforms
8
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
SN75LBC978
9-CHANNEL DIFFERENTIAL TRANSCEIVER
SLLS134E – APRIL 1992 – REVISED MAY 1997
PARAMETER MEASUREMENT INFORMATION
0V 3V
S1
0V
S3
5V
R1 = 165 Ω
74HC241
B+
A
50 pF†
75 Ω
50 pF†
B–
VOD
R2 = 165 Ω
DE/RE
Input
(see Note A)
CE at VCC,
WRAP1 and WRAP2
at GND
5V
S2
0V
VA
TEST CIRCUIT
3V
Input
0V
ten(RXL)
VA
1.4 V
S1 to 0 V
S2 to 5 V
S3 to 3 V
ten(TXH)
0V
VOD
3V
Input
0V
ten(RXH)
1.4 V
VA
S1 to 5 V
S2 to 0 V
S3 to 0 V
ten(TXL)
VOD
0V
VOLTAGE WAVEFORMS
† Includes probe and jig capacitance.
NOTE A: The input is provided by a pulse generator with an output of 0 to 3 V, PRR of 1 MHz, 50% duty cycle, tr and tf < 6 ns,
and ZO = 50 Ω.
Figure 6. Enable Time Test Circuit and Voltage Waveforms
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
9
SN75LBC978
9-CHANNEL DIFFERENTIAL TRANSCEIVER
SLLS134E – APRIL 1992 – REVISED MAY 1997
TYPICAL CHARACTERISTICS
INPUT CURRENT
vs
INPUT VOLTAGE
AVERAGE SUPPLY CURRENT
vs
FREQUENCY
0
400
–10
I I – Input Current – µ A
I CC – Average Supply Current – mA
1000
100
40
9 Unloaded Receivers
10
4
1
0.001
9 Unloaded Drivers
0.004 0.01
VCC = 4.75 V
TA = 25°C
A, DE/RE, WRAP1, WRAP2
– 20
– 30
– 40
– 50
0.04
1
2
4
– 60
0
10
0.5
1
1.5
f – Frequency – MHz
INPUT CURRENT
vs
INPUT VOLTAGE
5
4
VCC = 4.75 V
TA = 25°C
B + and B –
3
I I – Input Current – mA
2.5
Figure 8
Figure 7
2
1
0
–1
–2
–3
–4
–5
– 20 –16 –12 – 8 – 4
0
4
8
12
VI – Input Voltage – V
Figure 9
10
2
3
VI – Input Voltage – V
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
16
20
3.5
4
4.5
SN75LBC978
9-CHANNEL DIFFERENTIAL TRANSCEIVER
SLLS134E – APRIL 1992 – REVISED MAY 1997
TYPICAL CHARACTERISTICS
DRIVER
DRIVER
LOW-LEVEL OUTPUT VOLTAGE
vs
LOW-LEVEL OUTPUT CURRENT
HIGH-LEVEL OUTPUT VOLTAGE
vs
HIGH-LEVEL OUTPUT CURRENT
5
2.1
VOH – High-Level Output Voltage – mV
1.9
1.8
1.7
1.6
1.5
1.4
1.3
4.75
4.5
4.25
4
VCC = 5.25 V
3.75
VCC = 5 V
3.5
3.25
3
2.75
1.2
VCC = 4.75 V
2.5
1.1
0
10
20
30
40
50
60
70
80
0
90 100
10
20
30
40
50
60
70
80
90
IOH – High-Level Output Current – mA
IOL – Low-Level Output Current – mA
Figure 10
Figure 11
DRIVER
DIFFERENTIAL OUTPUT VOLTAGE
vs
OUTPUT CURRENT
5
TA = 25°C
VOD – Differential Output Voltage – V
VOL – Low-Level Output Voltage – V
B+ and B –
VCC = 5 V
B+ and B –
2
4
3
VCC = 5 V
2
VCC = 5.25 V
1
VCC = 4.75 V
0
0
10
20
30
40
50
60
70
80
90 100
IO – Output Current – mA
Figure 12
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
11
SN75LBC978
9-CHANNEL DIFFERENTIAL TRANSCEIVER
SLLS134E – APRIL 1992 – REVISED MAY 1997
TYPICAL CHARACTERISTICS
DRIVER
DRIVER
LOW-LEVEL OUTPUT CURRENT
vs
SUPPLY VOLTAGE
HIGH-LEVEL OUTPUT CURRENT
vs
SUPPLY VOLTAGE
80
0
B+ and B –
70
I OH – High-Level Output Current – mA
I OL – Low-Level Output Current – mA
B+ and B –
60
50
40
30
20
10
0
2
2.5
3
3.5
4
4.5
5
–10
– 20
– 30
– 40
– 50
– 60
– 70
– 80
5.5
2
2.5
VCC – Supply Voltage – V
3
Figure 13
4
4.5
5
5.5
Figure 14
RECEIVER
RECEIVER
HIGH-LEVEL OUTPUT VOLTAGE
vs
HIGH-LEVEL OUTPUT CURRENT
LOW-LEVEL OUTPUT VOLTAGE
vs
LOW-LEVEL OUTPUT CURRENT
2
5.5
VCC = 5 V
VOL – Low-Level Output Voltage – V
5
VOH – High-Level Output Voltage – V
3.5
VCC – Supply Voltage – V
4.5
VCC = 5.25 V
4
VCC = 5 V
3.5
3
2.5
2
1.5
VCC = 4.75 V
1
VCC = 4.75 V
1.5
VCC = 5.25 V
1
0.5
0.5
0
0
0
–10
– 20
– 30
– 40
– 50
– 60
–70
IOH – High-Level Output Current – mA
0
10
Figure 15
12
20
30
Figure 16
POST OFFICE BOX 655303
40
50
IOL – Low-Level Output Current – mA
• DALLAS, TEXAS 75265
60
SN75LBC978
9-CHANNEL DIFFERENTIAL TRANSCEIVER
SLLS134E – APRIL 1992 – REVISED MAY 1997
TYPICAL CHARACTERISTICS
RECEIVER
DRIVER
PROPAGATION DELAY
vs
FREE-AIR TEMPERATURE
DIFFERENTIAL OUTPUT VOLTAGE
vs
FREE-AIR TEMPERATURE
26.5
1
tpd – Propagation Delay Time – ns
0.8
0.6
0.4
0.2
0
160
26
VCC = 4.75 V
25.5
25
VCC = 5.25 V
24.5
24
165
175
170
0
10
20
30
40
50
60
70
TA – Free-Air Temperature – °C
TA – Free-Air Temperature – °C
Figure 17
Figure 18
DRIVER
PROPAGATION DELAY TIME
vs
FREE-AIR TEMPERATURE
23
22
tpd – Propagation Delay Time – ns
VOD – Differential Output Voltage – V
B+ and B –
21
VCC = 4.75 V
20
19
18
VCC = 5.25 V
17
16
15
0
10
20
30
40
50
60
70
TA – Free-Air Temperature – °C
Figure 19
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
13
SN75LBC978
9-CHANNEL DIFFERENTIAL TRANSCEIVER
SLLS134E – APRIL 1992 – REVISED MAY 1997
APPLICATION INFORMATION
function tables
Table 1. Channel Configuration for
Totem Pole Circuit
Table 2. Channel Configuration for
Emitter Follower Circuit
CE is high,
WRAP1 or WRAP2 is high
CE is high,
WRAP1 or WRAP2 is low
Emitter Follower
Totem Pole
DE/RE
B+
A
B–
B+
DE/RE
A
B–
Open Collector
INPUTS
DE/RE
L
L
H
H
A
X
X
L
H
B +†
L
H
X
X
OUTPUTS
B –†
H
L
X
X
A
L
H
Z
Z
B+
Z
Z
L
H
Z
Z
H
L
H = high level L = low level X = irrelevant Z = high
impedance
† An H in this column represents a voltage 200 mV
higher than the other bus input. An L represents a
voltage 200 mV lower than the other bus input. Any
voltage less than 200 mV results in an indeterminate
receiver output.
14
INPUTS
B–
POST OFFICE BOX 655303
OUTPUTS
DE/RE
B+
B–
A
B+
B–
L
L
H
H
L
H
X
X
H
L
X
X
L
H
H
H
Z
Z
H
H
Z
Z
L
L
H = high level L = low level X = irrelevant Z = high
impedance
• DALLAS, TEXAS 75265
SN75LBC978
9-CHANNEL DIFFERENTIAL TRANSCEIVER
SLLS134E – APRIL 1992 – REVISED MAY 1997
MECHANICAL INFORMATION
DL (R-PDSO-G**)
PLASTIC SMALL-OUTLINE PACKAGE
48 PIN SHOWN
0.025 (0,635)
0.012 (0,305)
0.008 (0,203)
48
0.005 (0,13) M
25
0.006 (0,15) NOM
0.299 (7,59)
0.291 (7,39)
0.420 (10,67)
0.395 (10,03)
Gage Plane
0.010 (0,25)
1
0°– 8°
24
0.040 (1,02)
A
0.020 (0,51)
Seating Plane
0.110 (2,79) MAX
0.004 (0,10)
0.008 (0,20) MIN
PINS **
28
48
56
A MAX
0.380
(9,65)
0.630
(16,00)
0.730
(18,54)
A MIN
0.370
(9,40)
0.620
(15,75)
0.720
(18,29)
DIM
4040048 / C 03/97
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 MO-118
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
15
IMPORTANT NOTICE
Texas Instruments (TI) reserves the right to make changes to its products or to discontinue any semiconductor
product or service without notice, and advises its customers to obtain the latest version of relevant information
to verify, before placing orders, that the information being relied on is current and complete.
TI warrants performance of its semiconductor products and related software 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, INTENDED, AUTHORIZED, OR WARRANTED
TO BE SUITABLE FOR USE IN LIFE-SUPPORT APPLICATIONS, DEVICES OR SYSTEMS OR OTHER
CRITICAL APPLICATIONS.
Inclusion of TI products in such applications is understood to be fully at the risk of the customer. Use of TI
products in such applications requires the written approval of an appropriate TI officer. Questions concerning
potential risk applications should be directed to TI through a local SC sales office.
In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards should be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance, customer product design, software performance, or
infringement of patents or services described herein. Nor does TI 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.
Copyright  1998, Texas Instruments Incorporated