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SN64BCT2827C 10-BIT BUS/MOS MEMORY DRIVER WITH 3-STATE OUTPUTS
SCBS415 - APRIL 1987 - REVISED NOVEMBER 1993
* * * * * * *
State-of-the-Art BiCMOS Design Significantly Reduces ICCZ ESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0) Output Ports Have Equivalent 33- Series Resistors, So No External Resistors Are Required High-Impedance State During Power Up and Power Down 3-State Outputs Drive Bus Lines or Buffer-Memory Address Registers Flow-Through Architecture Optimizes PCB Layout Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic 300-mil DIPs (NT)
DW OR NT PACKAGE (TOP VIEW)
OE1 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 GND
1 2 3 4 5 6 7 8 9 10 11 12
24 23 22 21 20 19 18 17 16 15 14 13
VCC Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8 Y9 Y10 OE2
description
This 10-bit buffer and bus/MOS driver provides a high-performance bus interface for wide data paths or buses carrying parity. The 3-state control gate is a 2-input AND gate with active-low inputs so that if either output-enable (OE1 or OE2) input is high, all ten outputs are in the high-impedance state. The outputs are also in the high-impedance state during power-up and power-down conditions. The outputs remain in the high-impedance state while the device is powered down. The outputs, which are designed to source or sink up to 12 mA, include 33- series resistors to reduce overshoot and undershoot. The SN64BCT2827C is characterized for operation from - 40C to 85C and 0C to 70C.
FUNCTION TABLE INPUTS OE1 L L H X OE2 L L X H A L H X X OUTPUT Y L H Z Z
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) 1993, Texas Instruments Incorporated
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* DALLAS, TEXAS 75265
1
SN64BCT2827C 10-BIT BUS/MOS MEMORY DRIVER WITH 3-STATE OUTPUTS
SCBS415 - APRIL 1987 - REVISED NOVEMBER 1993
logic symbol
1 OE1 OE2 13 & EN
logic diagram (positive logic)
OE1 OE2 1 13
2 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 2 3 4 5 6 7 8 9 10 11 1 23 22 21 20 19 18 17 16 15 14 A1 Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8 Y9 Y10
23 Y1
To Nine Other Channels
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
schematic of each output
VCC
Output
GND
2
POST OFFICE BOX 655303
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SN64BCT2827C 10-BIT BUS/MOS MEMORY DRIVER WITH 3-STATE OUTPUTS
SCBS415 - APRIL 1987 - REVISED NOVEMBER 1993
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 (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 0.5 V to 7 V Voltage range applied to any output in the disabled or power-off state, VO . . . . . . . . . . . . . . . - 0.5 V to 5.5 V Voltage range applied to any output in the high state, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 0.5 V to VCC Input clamp current, IIK (VI < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 30 mA Current into any output in the low state, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 mA Operating free-air temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 40C to 85C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 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. NOTE 1: The input negative-voltage rating may be exceeded if the input clamp-current rating is observed.
recommended operating conditions (see Note 2)
MIN VCC VIH VIL IIK IOH IOL t /VCC Supply voltage High-level input voltage Low-level input voltage Input clamp current High-level output current Low-level output current Power-up ramp rate 2 - 40 85 4.5 2 0.8 -18 -1 12 NOM 5 MAX 5.5 UNIT V V V mA mA mA s / V C
TA Operating free-air temperature NOTE 2: Unused or floating inputs must be held high or low.
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER VIK VOH VOL II IIH IIL IOZ IOZH IOZL IOL(sink) IO ICCL ICCZ Ci VCC = 4.5 V, VCC = 4.5 V to 5.5 V, VCC = 4 5 V 4.5 VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 0 to 2.3 V (power up) VCC = 1.8 to 0 (power down) VCC = 5.5 V, VCC = 5.5 V, VCC = 4.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5 V, TEST CONDITIONS II = -18 mA IOH = - 1 mA IOL = 1 mA IOL = 12 mA VI = 7 V VI = 2.7 V VI = 0.5 V VO = 2.7 or 0.5 V, 27 05V VO = 2.7 V VO = 0.5 V VO = 2 V VO = 2.25 V Outputs open Outputs open VI = VCC or GND VO = VCC or GND 50 - 30 28 3.8 5 -112 40 6 OE = 0 8 V 0.8 MIN VCC - 2 0.15 0.35 0.5 0.8 0.1 20 - 0.2 20 20 20 - 20 TYP MAX -1.2 UNIT V V V mA A mA A A A mA mA mA mA pF
Co VCC = 5 V, 8 pF All typical values are at VCC = 5 V, TA = 25C. The output conditions have been chosen to produce a current that closely approximates one half ot the true short-circuit output current, IOS.
POST OFFICE BOX 655303
* DALLAS, TEXAS 75265
3
SN64BCT2827C 10-BIT BUS/MOS MEMORY DRIVER WITH 3-STATE OUTPUTS
SCBS415 - APRIL 1987 - REVISED NOVEMBER 1993
switching characteristics over recommended range of supply voltage, CL = 50 pF (unless otherwise noted) (see Note 3)
PARAMETER tPLH tPHL tPZH tPZL tPHZ tPLZ FROM (INPUT) A TO (OUTPUT) Y Y Y VCC = 5 V, TA = 25C MIN 0.9 2 2.8 5 3.2 2.7 TYP 3.6 5.1 5.6 8.9 6.7 5.3 MAX 5.2 7.2 8 11 10.5 8.5 TA = - 40C to 85C MIN 0.9 2 2.8 5 3.2 2.7 MAX 6.6 8.2 11.5 13.7 14 11 TA = 0C to 70C MIN 0.9 2 2.8 5 3.2 2.7 MAX 6 7.8 10.7 12.9 13 10 ns ns ns UNIT
OE OE
NOTE 3: Load circuits and voltage waveforms are shown in Section 1.
4
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Copyright (c) 1998, Texas Instruments Incorporated

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