参数资料
型号: 74ABT657PW,118
厂商: NXP Semiconductors
文件页数: 16/17页
文件大小: 0K
描述: IC TRANSCVR 3ST 8BIT 24TSSOP
产品培训模块: Logic Packages
标准包装: 2,500
系列: 74ABT
逻辑类型: 收发器,非反相
元件数: 1
每个元件的位元数: 8
输出电流高,低: 32mA,64mA
电源电压: 4.5 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 24-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 24-TSSOP
包装: 带卷 (TR)
其它名称: 74ABT657PW-T
74ABT657PW-T-ND
935178900118
74ABT657_3
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 03 — 15 March 2010
8 of 17
NXP Semiconductors
74ABT657
Octal transceiver with parity generator/checker; 3-state
10. Dynamic characteristics
[1]
These delay times reect the 3-state recovery time only and do not include the delay through the buffers and the parity check circuitry
which affect the ERROR output. To ensure valid information at the ERROR pin, time must be allowed for the signal to propagate
through the drivers (B to A), through the parity check circuitry (same as A to PARITY), and to the ERROR output. Valid data at the
ERROR pin
≥ (B to A) + (A to PARITY).
Table 7.
Dynamic characteristics
GND = 0 V; for test circuit, see Figure 9.
Symbol Parameter
Conditions
25
°C; V
CC = 5.0 V
40 °C to +85 °C;
VCC = 5.0 V ± 0.5 V
Unit
Min
Typ
Max
Min
Max
tPLH
LOW to HIGH
propagation delay
An to Bn or Bn to An; see Figure 6
1.1
2.5
4.1
1.1
4.6
ns
An to PARITY; see Figure 5 and 6
2.5
5.1
6.7
2.5
8.1
ns
ODD/EVEN to PARITY and ERROR;
see Figure 5 and 6
1.7
3.5
4.6
1.7
5.3
ns
Bn to ERROR; see Figure 5 and 6
3.9
7.3
10.2
3.9
12.3
ns
PARITY to ERROR; see Figure 5 and 6
2.7
4.5
5.9
2.7
7.7
ns
tPHL
HIGH to LOW
propagation delay
An to Bn or Bn to An; see Figure 6
1.2
3.0
3.9
1.2
4.3
ns
An to PARITY; see Figure 5 and 6
2.8
5.0
7.4
2.8
8.9
ns
ODD/EVEN to PARITY and ERROR;
see Figure 5 and 6
1.9
3.7
5.1
1.9
5.8
ns
Bn to ERROR; see Figure 5 and 6
4.0
7.9
10.5
4.0
12.9
ns
PARITY to ERROR; see Figure 5 and 6
3.2
5.2
6.7
3.2
8.1
ns
tPZH
OFF-state to HIGH
propagation delay
see Figure 7 and 8
1.3
3.6
5.5
1.3
6.5
ns
tPZL
OFF-state to LOW
propagation delay
see Figure 7 and 8
1.9
4.2
5.3
1.9
6.5
ns
tPHZ
HIGH to OFF-state
propagation delay
see Figure 7 and 8
2.4
3.6
5.6
2.4
6.2
ns
tPLZ
LOW to OFF-state
propagation delay
see Figure 7 and 8
2.2
3.4
7.3
2.2
7.8
ns
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