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BCD-TO-SEVEN-SEGMENT DECODERS / DRIVERS

SN54 / 74LS247 SN54 / 74LS248 SN54 / 74LS249

BCD-TO-SEVEN-SEGMENT DECODERS / DRIVERS
SN54 / 74LS247 SN54 / 74LS248 SN54 / 74LS249
BCD-TO-SEVEN-SEGMENT DECODERS / DRIVERS
LOW POWER SCHOTTKY
J SUFFIX CERAMIC CASE 620-09
N SUFFIX PLASTIC CASE 648-08
· Open-Collector Outputs Drive Indicators Directly · Lamp-Test Provision · Leading / Trailing Zero Suppression
LS248 · Internal Pull-Ups Eliminate Need for External Resistors · Lamp-Test Provision · Leading / Trailing Zero Suppression LS249 · Open-Collector Outputs · Lamp-Test Provision · Leading / Trailing Zero Suppression
D SUFFIX SOIC CASE 751B-03
ORDERING INFORMATION
SN54LSXXXJ Ceramic SN74LSXXXN Plastic SN74LSXXXDW SOIC
NUMERICAL DESIGNATIONS AND RESULTANT DISPLAYS
SEGMENT IDENTIFICATION
FAST AND LS TTL DATA 5-1
SN54 / 74LS247 · SN54 / 74LS248 · SN54 / 74LS249
SN54 / 74LS248 SN54 / 74LS259 (TOP VIEW)
SN54 / 74LS247 (TOP VIEW)
INPUTS
3 4 LAMP RB TEST OUT PUT
INPUTS
3 4 LAMP RB TEST OUT PUT
INPUTS
ALL CIRCUIT TYPES FEATURE LAMP INTENSITY MODULATION CAPABILITY
DRIVER OUTPUTS TYPE SN54LS247 SN54LS248 SN54LS249 SN74LS247 SN74LS248 SN74LS249 ACTIVE LEVEL low high high low high high OUTPUT CONFIGURATION open-collector 2.0 k pull-up open-collector open-collector 2.0 k pull-up open-collector SINK CURRENT 12 mA 2.0 mA 4.0 mA 24 mA 6.0 mA 8.0 mA MAX VOLTAGE 15 V 5.5 V 5.5 V 15 V 5.5 V 5.5 V TYPICAL POWER DISSIPATION 35 mW 125 mW 40 mW 35 mW 125 mW 40 mW
LOGIC DIAGRAM LS247
(13) INPUT (7) A INPUT (1) B INPUT (2) C INPUT (6) D BI / RBO BLANKING (4) INPUT OR RIPPLE-BLANKING OUTPUT (3) (14) (12) OUTPUT a INPUT (7) A OUTPUT b OUTPUT c OUTPUT d OUTPUT e OUTPUT f OUTPUT g LAMP TEST INPUT (3) (14) INPUT (1) B INPUT (2) C INPUT (6) D BLANKING (4) INPUT OR RIPPLE-BLANKING OUTPUT (12)
LS248, LS249
OUTPUT a
OUTPUT b OUTPUT c OUTPUT d OUTPUT e OUTPUT f OUTPUT g
LAMP TEST INPUT RBI (5) RIPPLE-BLANKING INPUT
RIPPLE-BLANKING (5) INPUT
FAST AND LS TTL DATA 5-2
SN54 / 74LS247 · SN54 / 74LS248 · SN54 / 74LS249
LS247 FUNCTION TABLE
LS248, LS249 FUNCTION TABLE
FAST AND LS TTL DATA 5-3
SN54 / 74LS247
GUARANTEED OPERATING RANGES
Symbol VCC TA IOH IOL VO(off) IO(on) Supply Voltage Operating Ambient Temperature Range Output Current - High BI / RBO Output Current - Low BI / RBO Off-State Output Voltage a - g On-State Output Current a - g On-State Output Current a - g Parameter 54 74 54 74 54, 74 54 74 54, 74 54 74 Min 4.5 4.75 - 55 0 Typ 5.0 5.0 25 25 Max 5.5 5.25 125 70 - 50 1.6 3.2 15 12 24 Unit V °C µA mA V mA
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
IO(off) VO(on)
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
Limits S b l Symbol tPLH tPHL tPHL tPLH P Parameter Turn-Off Time from A Input Turn-On Time from A Input Turn-Off Time from RBI Input Turn-On Time from RBI Input Min Typ Max 100 100 100 100 U i Unit ns ns T Test C di i Conditions
FAST AND LS TTL DATA 5-4
SN54 / 74LS248
GUARANTEED OPERATING RANGES
Symbol VCC TA IOH Supply Voltage Operating Ambient Temperature Range Output Current - High BI / RBO Output Current - High IOL a-g Parameter 54 74 54 74 54, 74 54, 74 54 74 54 74 Min 4.5 4.75 - 55 0 Typ 5.0 5.0 25 25 Max 5.5 5.25 125 70 - 50 - 100 1.6 3.2 2.0 6.0 mA Unit V °C µA
Output Current - Low BI / RBO Output Current - Low BI / RBO Output Current - Low a - g Output Current - Low a - g
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
FAST AND LS TTL DATA 5-5
SN54 / 74LS249
GUARANTEED OPERATING RANGES
Symbol VCC TA IOH IOL VOH IOL Supply Voltage Operating Ambient Temperature Range Output Current - High BI / RBO Output Current - Low BI / RBO Output Current - Low BI / RBO Output Voltage - High a - g Output Current - Low a - g Output Current - Low a - g Parameter 54 74 54 74 54, 74 54 74 54, 74 54 74 Min 4.5 4.75 - 55 0 Typ 5.0 5.0 25 25 Max 5.5 5.25 125 70 - 50 1.6 3.2 5.5 4.0 8.0 Unit V °C µA mA V mA
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
FAST AND LS TTL DATA 5-6