SN75207B Datasheet, PDF (1/12 Pages) Texas Instruments – DUAL SENSE AMPLIFIER FOR MOS MEMORIES OR DUAL HIGH-SENSITIVITY LINE RECEIVERS

SN75207B
DUAL SENSE AMPLIFIER FOR MOS MEMORIES
OR DUAL HIGH-SENSITIVITY LINE RECEIVERS
SLLS096C – JULY 1973 – REVISED MARCH 1997
D Plug-In Replacement for SN75107A and
SN75107B With Improved Characteristics
D ± 10-mV Input Sensitivity
D TTL-Compatible Circuitry
D Standard Supply Voltages . . . ± 5 V
D Differential Input Common-Mode Voltage
Range of ± 3 V
D Strobe Inputs for Channel Selection
D Totem-Pole Outputs
D SN75207B Has Diode-Protected Input Stage
for Power-Off Condition
D Sense Amplifier for MOS Memories
D Dual Comparator
D High-Sensitivity Line Receiver
N PACKAGE
(TOP VIEW)
1A ₁
1B ₂
NC ₃
1Y ₄
1G ₅
S₆
GND ₇
14 V_{CC +}
13 V_{CC –}
12 ^2A
11 ^2B
10 ^NC
9 ^2Y
8 ^2G
NC – No internal connection
description
The SN75207B is a terminal-for-terminal replacement for the SN75107B. The improved input sensitivity makes
it more suitable for MOS memory sense amplifiers and can result in faster memory cycles. Improved sensitivity
also makes it more useful in line-receiver applications by allowing use of longer transmission line lengths. The
SN75207B features a TTL-compatible, active-pullup output.
Input protection diodes are in series with the collectors of the differential-input transistors of the SN75207B.
These diodes are useful in certain party-line systems that may have multiple V_{CC +} power supplies and may be
operated with some of the V_{CC +} supplies turned off. In such a system, if a supply is turned off and allowed to
go to ground, the equivalent input circuit connected to that supply would be as follows:
Input
SN75207B
This would be a problem in specific systems that might have the transmission lines biased to some potential
greater than 1.4 V.
This device is characterized for operation from 0°C to 70°C.
FUNCTION TABLE
DIFFERENTIAL INPUTS ^STROBES
A–B
GS
VID ≥ 10 mV
XX
XL
– 10 mV < VID < 10 mV
LX
HH
XL
VID ≤ –10 mV
LX
HH
H = high level, L = low level, X = irrelevant
OUTPUT
Y
H
H
H
Indeterminate
H
H
L
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.
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
Copyright © 1997, Texas Instruments Incorporated
1