- 您现在的位置：买卖IC网 > PDF目录97098 > SNJ54LS490FKR (TEXAS INSTRUMENTS INC) LS SERIES, ASYN NEGATIVE EDGE TRIGGERED 4-BIT UP DECADE COUNTER, CQCC20 PDF资料下载
参数资料
| 型号： | SNJ54LS490FKR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 计数器 |
| 英文描述： | LS SERIES, ASYN NEGATIVE EDGE TRIGGERED 4-BIT UP DECADE COUNTER, CQCC20 |
| 封装： | CERAMIC, QCC-20 |
| 文件页数： | 5/9页 |
| 文件大小： | 147K |
| 代理商： | SNJ54LS490FKR |
SN54LS490, SN74LS490
DUAL 4-BIT DECADE COUNTERS
SDLS125A – OCTOBER 1976 – REVISED JULY 1998
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC (see Note 1)
–0.5 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clear and set-to-9 voltage
–0.5 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clock input voltage
–0.5 V to 5.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance,
θJA (see Note 2): D package
113
°C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
N package
78
°C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, Tstg
–65
°C to 150°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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. Voltage values are with respect to network ground terminal.
2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace
length of zero.
recommended operating conditions
SN54LS490
SN74LS490
UNIT
MIN
NOM
MAX
MIN
NOM
MAX
UNIT
VCC
Supply voltage
4.5
5
5.5
4.75
5
5.25
V
IOH
High-level output current
–400
A
IOL
Low-level output current
4
8
mA
fcount
Count frequency
0
25
0
25
MHz
tw
Pulse width (any input)
20
ns
tsu
Clear or set-to-9 inactive-state setup time
25
↓
25
↓
ns
TA
Operating free-air temperature
–55
125
0
70
°C
The arrow (
↓) indicates that the falling edge of the clock pulse is used for reference.
相关PDF资料 |
PDF描述 |
|---|---|
| SNJ54LS490FK | LS SERIES, ASYN NEGATIVE EDGE TRIGGERED 4-BIT UP DECADE COUNTER, CQCC20 |
| SNJ54LS490J | LS SERIES, ASYN NEGATIVE EDGE TRIGGERED 4-BIT UP DECADE COUNTER, CDIP16 |
| SNJ54LS589J | LS SERIES, 8-BIT RIGHT PARALLEL IN SERIAL OUT SHIFT REGISTER, TRUE OUTPUT, CDIP16 |
| SN74LS589N | LS SERIES, 8-BIT RIGHT PARALLEL IN SERIAL OUT SHIFT REGISTER, TRUE OUTPUT, PDIP16 |
| SN54LS589FK | LS SERIES, 8-BIT RIGHT PARALLEL IN SERIAL OUT SHIFT REGISTER, TRUE OUTPUT, CQCC20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SNJ54LS490W | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述: |
| SNJ54LS49J | 制造商:Texas Instruments 功能描述:Decoder/Driver Single 4-to-7 14-Pin CDIP Tube 制造商:Rochester Electronics LLC 功能描述:BCD-TO-SEVEN-SEGMENT DECODER - Bulk |
| SNJ54LS51FK | 制造商:Rochester Electronics LLC 功能描述:DUAL AND-OR-INVERT GATE - Bulk 制造商:Texas Instruments 功能描述: |
| SNJ54LS51J | 制造商:Rochester Electronics LLC 功能描述:DUAL AND-OR-INVERT GATE - Bulk |
| SNJ54LS51W | 制造商:Texas Instruments 功能描述: |
发布紧急采购，3分钟左右您将得到回复。