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 ST26C31B
CMOS quad 3-state differential line driver
Features

TTL input compatible Typical propagation delay: 6 ns Typical output skew: 0.5 ns Output will not load line when VCC = 0 V Meets the requirements of EIA standard RS-422 Operation from single 5 V supply 3-state outputs for connection to system buses Low quiescent current Available in surface mount
TSSOP16 DIP-16 SO-16
Description
The ST26C31B is a quad differential line driver designed for digital data transmission over balanced lines and meets all the requirements of EIA standard RS-422 while retaining the low power characteristics of CMOS. The ST26C31B accepts TTL or CMOS input levels and translates these to RS-422 output levels. This part uses special outputs circuitry common to all four drivers. All outputs are protected against damage due to electrostatic discharge by diode to VCC and ground.
Table 1.
Device summary
Temperature range -40 to 85 C -40 to 85 C -40 to 85 C Package DIP-16 SO-16 (tape and reel) TSSOP16 (tape and reel) Packaging 25 parts per tube / 40 tube per box 2500 parts per reel 2500 parts per reel
Order codes ST26C31BN ST26C31BDR ST26C31BTR
June 2008
Rev 8
1/15
www.st.com 15
Contents
ST26C31B
Contents
1 2 3 4 5 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2/15
ST26C31B
Pin configuration
1
Figure 1.
Pin configuration
Pin connections
Table 2.
Pin n 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Pin description
Symbol AIN AOUT AOUT EN BOUT BOUT BIN GND CIN COUT COUT EN DOUT DOUT DIN VCC Input A Channel A output Channel A output ENABLE Channel B output Channel B output Input B Ground Input C Channel C output Channel C output ENABLE Channel D output Channel D output Input D Supply voltage Name and function
3/15
Pin configuration
ST26C31B
Table 3.
Truth table
Enable H Input X L Output Z L H Output Z H L
Enable L
All other combinations of enable inputs H
Note:
L = Low voltage state H = High logic state X = Don't care Z = High impedance
4/15
ST26C31B
Maximum ratings
2
Table 4.
Symbol VCC VIN VOUT IIK IOUT ICC TSTG
Maximum ratings
Absolute maximum ratings (1) (2)
Parameter Supply voltage DC input voltage DC output voltage (high or low state) Clamp diode current DC output current per pin DC VCC or gnd current Storage temperature range Value -0.5 to 7 -0.5 to (VCC + 0.5) -0.5 to 7 20 150 150 -65 to +150 Unit V V V mA mA mA C
1. Absolute maximum ratings are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the device should be operated at these limits. The table of electrical characteristics provide conditions for actual device operation. 2. Unless otherwise specified, all voltage are referenced to ground. All currents into the device pins are positive; all currents out of the device pins are negative.
Table 5.
Symbol VCC VIN VOUT VOUT TA tr, tf
Recommended operating conditions
Parameter Supply voltage DC input voltage DC output voltage (high or low state) DC output voltage (VCC = 0 V or high impedance) Operating temperature range Maximum enable input rise or fall times Value 4.5 to 5.5 0 to VCC 0 to VCC 0 to 5 -40 to +85 500 Unit V V V V C ns
5/15
Electrical characteristics
ST26C31B
3
Table 6.
Symbol VIH VIL VOH VOL VT VT-VT VOS VOSVOS IIN ICC IOZ ISC IOFF
Electrical characteristics
Electrical characteristics (VCC = 5 V 10 %, unless otherwise specified (1))
Value Parameter High level input voltage Low level input voltage High level output voltage Low level output voltage VIN = VIH or VIL, IOUT = -20mA VIN = VIH or VIL, IOUT = +20mA 2 2.5 3.4 0.3 3.1 0.4 1.8 3 0.4 1 200 0.8 0.5 -30 500 2 5 -150 100 -100 0.5 Test conditions Min. 2 0.8 Typ. Max. V V V V V V V V A A mA A mA A A Unit
Differential output voltage RL = 100 (2) Difference in differential output voltage Common mode output voltage Difference in common mode output voltage Input current Quiescent supply current
(2)
RL = 100 (2) RL = 100 (2) RL = 100 (2) VIN = VCC, GND, VIH or VIL IOUT = 0 A VIN = VCC or GND VIN = 2.4 or 0.5 V
(3)
3-state output leakage current Output short circuit current Power off output leakage current (2)
VOUT = VCC or GND ENABLE = VIH ENABLE = VIL VIN = (2) (4) VCC or GND VOUT = 6 V VOUT = -0.25 V
VCC = 0 V
1. Unless otherwise specified, min./max. limits apply across the recommended operating temperature range. All typical are given for VCC = 5 V and TA = 25 C 2. See EIA Specification RS422 for exact test conditions. 3. Measured per pin input. All other input at VCC or GND. 4. This is the current sourced when a high output is shorted to ground. Only one output at time should be shorted.
6/15
ST26C31B Table 7.
Symbol tPLH tPHL Skew tTLH tTHL tPZH tPZL tPHZ tPLZ CPD CIN
Electrical characteristics Switching characteristics (VCC = 5 V 10 %, tr = tf 6 ns (1))
Value Parameter Test conditions Min. Propagation delay input to output
(2)
Unit Typ. 6 0.5 6 11 13 5 7 50 6 Max. 11 2 10 19 21 9 11 ns ns ns ns ns ns ns pF pF
S1 Open S1 Open S1 Open S1 Closed S1 Closed
2
Differential output rise and fall times Output enable time Output enable time Output disable time
(3)
S1 Closed S1 Closed
(4)
Output disable time (3) Power dissipation capacitance Input capacitance
1. Unless otherwise specified, min./max. limits apply across the recommended operating temperature range. All typical are given for VCC = 5 V and TA = 25 C 2. Skew is defined as the difference in propagation delays between complementary outputs at the 50 % point. 3. Output disable time is the delay from the control input being switched to the output transistors tuning off. The actual disable times are less than indicated due to the delay added by RC time constant of the load. 4. CPD determines the no load dynamic power consumption, PD = CPDVCC2, f = ICCVCC, and the no load dynamic current consumption, PD = CPD VCCf + ICC .
7/15
Package mechanical data
ST26C31B
4
Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK(R) packages. These packages have a lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com
8/15
ST26C31B
Package mechanical data
Plastic DIP-16 (0.25) mechanical data
mm. Dim. Min. a1 B b b1 D E e e3 F I L Z 3.3 1.27 8.5 2.54 17.78 7.1 5.1 0.130 0.050 0.51 0.77 0.5 0.25 20 0.335 0.100 0.700 0.280 0.201 1.65 Typ. Max. Min. 0.020 0.030 0.020 0.010 0.787 0.065 Typ. Max. inch.
P001C
9/15
Package mechanical data
ST26C31B
SO-16 mechanical data
Dim. A a1 a2 b b1 C c1 D E e e3 F G L M S 3.8 4.6 0.5 9.8 5.8 1.27 8.89 4.0 5.3 1.27 0.62 8 (max.) 0.149 0.181 0.019 10 6.2 0.35 0.19 0.5 45 (typ.) 0.385 0.228 0.050 0.350 0.157 0.208 0.050 0.024 0.393 0.244 0.1 mm. Min. Typ. Max. 1.75 0.25 1.64 0.46 0.25 0.013 0.007 0.019 0.004 Min. inch. Typ. Max. 0.068 0.010 0.063 0.018 0.010
0016020D
10/15
ST26C31B
Package mechanical data
TSSOP16 mechanical data
mm. Dim. Min. A A1 A2 b c D E E1 e K L 0 0.45 0.60 0.05 0.8 0.19 0.09 4.9 6.2 4.3 5 6.4 4.4 0.65 BSC 8 0.75 0 0.018 0.024 1 Typ. Max. 1.2 0.15 1.05 0.30 0.20 5.1 6.6 4.48 0.002 0.031 0.007 0.004 0.193 0.244 0.169 0.197 0.252 0.173 0.0256 BSC 8 0.030 0.004 0.039 Min. Typ. Max. 0.047 0.006 0.041 0.012 0.0079 0.201 0.260 0.176 inch.
A
A2 A1 b e K c L E
D
E1
PIN 1 IDENTIFICATION
1
0080338D
11/15
Package mechanical data
ST26C31B
Tape & reel SO-16 mechanical data
mm. Dim. Min. A C D N T Ao Bo Ko Po P 6.45 10.3 2.1 3.9 7.9 12.8 20.2 60 22.4 6.65 10.5 2.3 4.1 8.1 0.254 0.406 0.082 0.153 0.311 Typ. Max. 330 13.2 0.504 0.795 2.362 0.882 0.262 0.414 0.090 0.161 0.319 Min. Typ. Max. 12.992 0.519 inch.
12/15
ST26C31B
Package mechanical data
Tape & reel TSSOP16 mechanical data
mm. Dim. Min. A C D N T Ao Bo Ko Po P 6.7 5.3 1.6 3.9 7.9 12.8 20.2 60 22.4 6.9 5.5 1.8 4.1 8.1 0.264 0.209 0.063 0.153 0.311 Typ. Max. 330 13.2 0.504 0.795 2.362 0.882 0.272 0.217 0.071 0.161 0.319 Min. Typ. Max. 12.992 0.519 inch.
13/15
Revision history
ST26C31B
5
Table 8.
Date
Revision history
Document revision history
Revision 7 8 Order codes updated. Added: Table 1 on page 1. Changes
02-May-2006 12-Jun-2008
14/15
ST26C31B
Please Read Carefully:
Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries ("ST") reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST's terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein.
UNLESS OTHERWISE SET FORTH IN ST'S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE, ST PRODUCTS ARE NOT RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY, DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER'S OWN RISK.
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15/15


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