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SN54ABTE16245, SN74ABTE16245 16-BIT INCIDENT-WAVE SWITCHING BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
SCBS226G - JULY 1993 - REVISED JUNE 1999
D D D D D D D D D D D
Members of the Texas Instruments Widebus TM Family State-of-the-Art EPIC-BTM BiCMOS Design Significantly Reduces Power Dissipation Support the VME64 ETL Specification Reduced, TTL-Compatible, Input Threshold Range High-Drive Outputs (IOH = -60 mA, IOL = 90 mA) Support 25- Incident-Wave Switching VCCBIAS Pin Minimizes Signal Distortion During Live Insertion Internal Pullup Resistor on OE Keeps Outputs in High-Impedance State During Power Up or Power Down Distributed VCC and GND Pin Configuration Minimizes High-Speed Switching Noise Equivalent 25- Series Damping Resistor on B Port Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors 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 PACKAGE SN74ABTE16245 . . . DGG OR DL PACKAGE (TOP VIEW)
1DIR 1B1 2B1 GND 1B2 2B2 VCC 1B3 2B3 GND 1B4 2B4 1B5 2B5 GND 1B6 2B6 VCC 1B7 2B7 GND 1B8 2B8 2DIR
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25
VCCBIAS 1A1 2A1 GND 1A2 2A2 VCC 1A3 2A3 GND 1A4 2A4 1A5 2A5 GND 1A6 2A6 VCC 1A7 2A7 GND 1A8 2A8 OE
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) input can be used to disable the device so that the buses are effectively isolated. When OE is low, the device is active. The B port has an equivalent 25- 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 -55C to 125C. The SN74ABTE16245 is characterized for operation from -40C to 85C.
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-B 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.
Copyright (c) 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.
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SN54ABTE16245, SN74ABTE16245 16-BIT INCIDENT-WAVE SWITCHING BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
SCBS226G - JULY 1993 - REVISED JUNE 1999
FUNCTION TABLE (each 8-bit section) INPUTS OE L L H DIR L H X OPERATION A data to B bus B data to A bus Isolation
logic diagram (positive logic)
1DIR 1 2DIR 24
OE
25
1B1
2
2B1
3
47
1A1
46
2A1
To Seven Other Channels
To Seven Other Channels
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 V to 7 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, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA Input clamp current, IIK (VI < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -18 mA Output clamp current, IOK (VO < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -50 mA Package thermal impedance, JA (see Note 2): DGG package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89C/W DL package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94C/W Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65C to 150C
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.
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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 MIN VCC VIH VIL VI IOH IOL t/v Supply voltage High-level High level input voltage Low-level Low level input voltage Input voltage High-level High level output current Low-level Low level output current Input transition rise or fall rate B bus A bus B bus A bus Outputs enabled OE Except OE OE Except OE 0 4.5 2 1.6 0.8 1.4 VCC -12 -24 12 64 10 0 NOM 5 MAX 5.5 SN74ABTE16245 MIN 4.5 2 1.6 0.8 1.4 VCC -12 -60 12 90 10 NOM 5 MAX 5.5 UNIT V V V V mA mA ns/V
TA Operating free-air temperature -55 125 -40 85 C 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, Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
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SN54ABTE16245, SN74ABTE16245 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)
PARAMETER VIK B port VOH A port TEST CONDITIONS VCC = 4.5 V, VCC = 5.5 V, VCC = 4 5 V 4.5 VCC = 5.5 V, VCC = 4 5 V 4.5 VCC = 4 5 V 4.5 VCC = 4 5 V 4.5 VCC = 4 5 V 4.5 VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5 5 V, 5.5 V II = -18 mA IOH = -100 A IOH = -1 mA IOH = -12 mA IOH = -1 mA IOH = -32 mA IOH = -64 mA IOL = 1 mA IOL = 12 mA IOL = 64 mA IOL = 90 mA VI = 0.8 V VI = 2 V VI = 0 to 5.5 V VI = VCC or GND VI = VCC or GND VO = 2.7 V VO = 0.5 V VO = 2.5 V 25 -50 -25 -120 -52 28 38 20 0.02 0.33 10 13 100 -100 500 1 20 10 -10 -180 -90 100 36 48 32 28 38 20 0.02 0.33 2.5 4.5 4 8 -50 -25 2.4 2 4.5 2.4 0.4 0.55 100 -100 500 1 20 10 -10 -180 -90 100 36 48 32 mA/ MHz pF pF mA A A A mA A A 2.4 2 0.4 0.8 0.55 0.9 V MIN SN54ABTE16245 TYP MAX -1.2 VCC-0.2 2.4 2 4.5 V MIN SN74ABTE16245 TYP MAX -1.2 VCC-0.2 UNIT V
B port VOL A port
II(hold) ( )
B port Control inputs A or B ports A port A port A port B port
II IOZH IOZL IO Ioff ICC
A or B ports
VCC = 0, VI or VO 4.5 V, VCCBIAS = 0 Outputs high VCC = 5.5 V, Outputs low IO = 0, VI = VCC or GND Outputs disabled VCC = 5 V, , CL = 50 pF VI = 2.5 V or 0.5 V VO = 2.5 V or 0.5 V OE high OE low
ICCD Ci Cio
A or B ports Control inputs I/O ports
All typical values are at VCC = 5 V, TA = 25C. The parameters IOZH and IOZL include the input leakage current.
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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
PARAMETER TEST CONDITIONS VCC = 0 to 4.5 V, VCCBIAS = 4.5 V to 5.5 V, IO(DC) = 0 VCC = 4.5 V to 5.5 V, VCCBIAS = 4.5 V to 5.5 V, IO(DC) = 0 VCC = 0 VCC = 0 VCCBIAS = 4.5 V to 5.5 V VCCBIAS = 4.75 V to 5.25 V VO = 0, VO = 3 V, VCCBIAS = 4.5 V VCCBIAS = 4.5 V 1.1 1.3 -20 20 MIN SN54ABTE16245 TYP MAX 250 700 20 1.5 1.5 1.9 1.7 -100 100 1.1 1.3 -20 20 1.5 1.5 MIN SN74ABTE16245 TYP MAX 250 700 A 20 1.9 1.7 -100 100 V A UNIT
ICC (VCCBIAS)
VO IO
A port A port
All typical values are at VCC = 5 V, TA = 25C. VCC - 0.5 V < VCCBIAS
switching characteristics over recommended ranges of supply voltage and operating free-air temperature, CL = 50 pF (unless otherwise noted) (see Figure 2)
PARAMETER tPLH tPHL tPLH tPHL tPZH tPZL tPZH tPZL tPHZ tPLZ tPHZ tPLZ FROM (INPUT) TO (OUTPUT) VCC = 5 V, TA = 25C MIN 1.5 1.5 1.5 1.5 2 2 2 2 2 2 2 2 TYP 3.3 3.8 3 3.1 3.9 4.4 4.5 5 4.9 3.7 5.2 4 MAX 4.2 4.6 3.8 4 5.3 5.9 6 6.4 5.9 4.6 6.2 5 SN54ABTE16245 MIN 1.5 1.5 1.5 1.5 2 2 2 2 2 2 2 2 MAX 5.4 5.4 4.7 4.7 6.4 7 7.3 7.5 7 5.4 7.2 5.8 SN74ABTE16245 MIN 1.5 1.5 1.5 1.5 2 2 2 2 2 2 2 2 MAX 5.2 5.2 4.5 4.5 6.2 6.8 7.1 7.3 6.7 5.1 7 5.5 ns ns ns ns ns ns UNIT
A B
B A A B A B
OE OE OE OE
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SN54ABTE16245, SN74ABTE16245 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, CL = 50 pF (unless otherwise noted) (see Figure 2)
PARAMETER tPLH tPHL tPLH tPHL tPLH tPHL B tsk( ) sk(p) A B B tsk(o) tt tt A B B A A B A A B A A B RX = 26 RX = 26 Rise or fall time 10%-90% 0.5 3.5 RX = 26 RX = Open B A B A FROM (INPUT) TO (OUTPUT) LOAD VCC = 5 V, TA = 25C MIN RX = 13 RX = 26 RX = 56 RX = Open 1.5 1.5 1.5 1.5 1.5 1.5 TYP 3.2 3.8 3.1 3.5 3 3.3 0.1 0.4 0.3 0.3 0.7 0.5 0.8 5.5 MAX 4 4.7 4 4.4 3.8 4.2 0.6 0.8 0.8 0.7 1.1 1 1.5 7.3 0.5 3.5 SN54ABTE16245 MIN 1.5 1.5 1.5 1.5 1.5 1.5 MAX 5 5.8 4.8 5.2 4.7 5.1 2 2 2 1.3 1.3 1.3 1.5 8.1 0.5 3.5 SN74ABTE16245 MIN 1.5 1.5 1.5 1.5 1.5 1.5 MAX 4.8 5.6 4.6 4.9 4.5 4.7 2 2 2 1.3 1.3 1.3 1.5 7.9 ns ns ns ns ns UNIT
B
A
ns
ns
tt is measured between 1 V and 2 V of the output waveform. tt is measured between 10% and 90% of the output waveform.
extended output characteristics over recommended ranges of supply voltage and operating free-air temperature, CL = 50 pF (see Figures 1 and 2)
PARAMETER tsk(temp) k(t ) tsk(load) FROM (INPUT) A B B TO (OUTPUT) B A B TEST CONDITIONS VCC = constant, , TA = 20C VCC = constant, Temperature = constant LOAD SN54ABTE16245 MIN MAX 3 RX = 56 RX = 13, 26, or 56 4.5 4.5 SN74ABTE16245 MIN MAX 2.5 4 4 UNIT ns ns
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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 A
B
Y2 Yn
Device 1 - Y1 tPLH1 Device 1 - Yn tPLH2 Device n - Yn B Y2 Yn tPHL1
In
Device n
tsk(o) tsk(load) tsk(temp) Y1
NOTES: A. Pulse skew, tsk(p), is defined as the difference in propagation delay times tPLH1 and tPHL1 on the same terminal at identical operating conditions. B. Output skew, tsk(o), is defined as the difference in propagation delay of any two outputs of the same device switching in the same direction (e.g., |tPLH1 - tPLH2|). C. Temperature skew, tsk(temp), is the output skew of two devices, both having the same value of VCC 1% and with package temperature differences of 20C. D. Load skew, tsk(load), is measured with RX in Figure 2 at 13 for one unit and 56 for the other unit.
W
W
Figure 1. Voltage Waveforms for Extended Characteristics
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SN54ABTE16245, SN74ABTE16245 16-BIT INCIDENT-WAVE SWITCHING BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
SCBS226G - JULY 1993 - REVISED JUNE 1999
PARAMETER MEASUREMENT INFORMATION
7V S2 Open SWITCHING TABLE LOADS tPLH/tPHL (A and B port) tPLZ/tPZL tPHZ/tPZH S1 Up Up Up S2 Open 7V Open
500
3.65 V
S1 From Output Under Test CL = 50 pF (see Note A) 500
94 RX
2 nF
EXTENDED SWITCHING TABLE LOADS tPLH/tPHL/tsk (A port) tPLH/tPHL/tsk (B port) tt (A port) (see Note E) tt (B port) (see Note F)
S1 Down Up Down Up
S2 X Open X Open
RX = 13, 26, or 56 LOAD CIRCUIT FOR OUTPUTS Output Control (low-level enabling) tPZL 3V Input 1.5 V 1.5 V 0V tPLH Output 1.5 V tPHL VOH 1.5 V VOL VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES Output Waveform 2 S2 at Open (see Note B) Output Waveform 1 S2 at 7 V (see Note B) tPZH 1.5 V 3V 1.5 V 1.5 V 0V tPLZ 3.5 V 1.5 V VOL + 0.3 V VOL tPHZ VOH VOH - 0.3 V 0V VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES
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 , 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
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Copyright (c) 1999, Texas Instruments Incorporated

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