TheTTL - Al Kossow's Bitsavers

SN54S484A, SN54S485A, SN74S484A, SN74S485A
BCD·TO·BINARY AND BINARY·TO·BCD CONVERTERS
absolute maximum ratings over operating free·air temperature (unless otherwise noted)
Supply voltage, Vee (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7 V
Input voltage ............................................................ , 5.5 V
Off·state output voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5.5 V
Operating free-air temperature range: SN54S484A, SN54S485A . . . . . . . . . . . .. - 55°C to 125°e
SN74S484A, SN74S485A ................ ooe to 70 0 e
Storage temperature range ......................................... - 65 °e to 150 0 e
recommended operating conditions
SN54S'
SN74S'
MIN NOM MAX MIN NOM MAX
Supply voltage. Vee 4.5 5 5.5 4.75 5 5.25 V
High-level output current. 10H -2 -6.5 mA
Low-level output current. 10L 16 16 mA
Operating free-air temperature -55 125 0 70 °e
electrical characteristics over recommended operating free-air temperature range (unless otherwise
noted)
PARAMETER TEST CONDITIONSt MIN TYP:I: MAX UNIT
VIH High-level input voltage 2 V
VIL Low-level input voltage 0.8 V
VIK Input clamp voltage Vee = MIN. II = -18 mA -1.2 V
VOH
VOL
10ZH
10ZL
II
High-level output voltage
Low-level output voltage
Off-state output current.
high-level voltage applied
Off-state output current.
low-level voltage applied
Input current at maximum
input voltage
VVV = MIN. VIH = 2 V. VIL = 0.8 V.
10H = MAX
Vee = MIN. VIH = 2 V. VIL = 0.8 V
10L = MAX
UNIT
2.4 3.1 V
0.5 V
Vee = MAX. VIH = 2 V. Vo = 2.4 V 50 p.A
Vee = MAX. VIH = 2 V. Vo = 0.5 V -50 p.A
Vee = MAX. VI = 5.5 V 1 mA
IIH High-level input current Vee = MAX. VI = 2.7 V 25 p.A
IlL Low-level input current Vee = MAX. VI = 0.5 V -0.25 mA
lOS Short-circuit output current 9 Vee = MAX. -30 -100 mA
lee Supply current Vee = MAX. See Note 2 75 100 mA
switching characteristics over recommended ranges of TA and Vee (unless otherwise noted)
TEST SN54S' SN74S'
PARAMETER
CONDITIONS MIN TYP:I: MAX MIN TYP:I: MAX
talA) Access time from address
45 75 45 70
eL = 30 pF.See Note 3
ta(S) Access time from chip select 20 40 20 35
tpxz Output disable time eL - 5 pF, See Note 3 15 35 15 30
UNIT
ns
ns
ns
tFor conditions shown as MIN or MAX. use the appropriate value specified under recommended operating condtions.
tAli typical values are at Vee = 5 V. TA = 25°. .
§Not more than one output should be shorted at a time and duration of the short-circuit should not exceed one second.
NOTES: 1. Voltage values are with respect to network ground terminal.
2. With outputs open and enable (G) inputs grounded. lee is measured first by selecting a word that contains the maximum
number of high-level outputs. then by selecting a word that contains the maximum number of low-level inputs.
3. Load circuits and voltage waveforms are shown in Section 1.
5-40
TEXAS -1!1
INSTRUMENTS
POST OFFICE BOX 225012 • DALLAS, TEXAS 75265